{"id":27866,"date":"2023-06-23T12:22:26","date_gmt":"2023-06-23T08:52:26","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/mastering-optimization-writing-the-most-performant-javascript-code-1d62\/"},"modified":"2023-06-23T12:22:26","modified_gmt":"2023-06-23T08:52:26","slug":"mastering-optimization-writing-the-most-performant-javascript-code-1d62","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/mastering-optimization-writing-the-most-performant-javascript-code-1d62\/","title":{"rendered":"\u062a\u0633\u0644\u0637 \u0628\u0631 \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc: \u0646\u0648\u0634\u062a\u0646 \u06a9\u0627\u0631\u0622\u0645\u062f\u062a\u0631\u06cc\u0646 \u06a9\u062f \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a"},"content":{"rendered":"<div data-article-id=\"1514038\" id=\"article-body\">\n<p>\u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u062f\u0631 \u0642\u0644\u0628 \u0627\u06cc\u062c\u0627\u062f 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\u062e\u0648\u0627\u0647\u06cc\u0645 \u062f\u0627\u062f.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter-rtl ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u0641\u0647\u0631\u0633\u062a \u0645\u0637\u0627\u0644\u0628<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"\u062a\u063a\u06cc\u06cc\u0631 \u0648\u0636\u0639\u06cc\u062a \u0641\u0647\u0631\u0633\u062a \u0645\u0637\u0627\u0644\u0628\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nabfollower.com\/blog\/mastering-optimization-writing-the-most-performant-javascript-code-1d62\/#1_%D8%A8%D9%87_%D8%AD%D8%AF%D8%A7%D9%82%D9%84_%D8%B1%D8%B3%D8%A7%D9%86%D8%AF%D9%86_%D9%85%D8%AA%D8%BA%DB%8C%D8%B1%D9%87%D8%A7%DB%8C_%D8%AC%D9%87%D8%A7%D9%86%DB%8C\" >1. \u0628\u0647 \u062d\u062f\u0627\u0642\u0644 \u0631\u0633\u0627\u0646\u062f\u0646 \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u062c\u0647\u0627\u0646\u06cc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nabfollower.com\/blog\/mastering-optimization-writing-the-most-performant-javascript-code-1d62\/#2_%D8%A7%D8%B3%D8%AA%D9%81%D8%A7%D8%AF%D9%87_%D8%A7%D8%B2_const_%D9%88_let_%D8%A8%D8%B1_%D9%81%D8%B1%D8%A7%D8%B2_var\" >2. \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 const \u0648 let \u0628\u0631 \u0641\u0631\u0627\u0632 var<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nabfollower.com\/blog\/mastering-optimization-writing-the-most-performant-javascript-code-1d62\/#3_%D8%A7%D9%86%D8%AA%D8%AE%D8%A7%D8%A8_%D8%A8%D8%B1%D8%A7%DB%8C_%D8%A8%D8%B1%D8%B1%D8%B3%DB%8C_%D8%AF%D9%82%DB%8C%D9%82_%D8%A8%D8%B1%D8%A7%D8%A8%D8%B1%DB%8C\" >3. \u0627\u0646\u062a\u062e\u0627\u0628 \u0628\u0631\u0627\u06cc \u0628\u0631\u0631\u0633\u06cc \u062f\u0642\u06cc\u0642 \u0628\u0631\u0627\u0628\u0631\u06cc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nabfollower.com\/blog\/mastering-optimization-writing-the-most-performant-javascript-code-1d62\/#4_%D8%A7%D9%86%D8%AA%D8%AE%D8%A7%D8%A8_%D8%B3%D8%A7%D8%AE%D8%AA%D8%A7%D8%B1_%D8%AF%D8%A7%D8%AF%D9%87_%D9%85%D9%86%D8%A7%D8%B3%D8%A8\" >4. \u0627\u0646\u062a\u062e\u0627\u0628 \u0633\u0627\u062e\u062a\u0627\u0631 \u062f\u0627\u062f\u0647 \u0645\u0646\u0627\u0633\u0628<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nabfollower.com\/blog\/mastering-optimization-writing-the-most-performant-javascript-code-1d62\/#5_%D8%A7%D8%AC%D8%AA%D9%86%D8%A7%D8%A8_%D8%A7%D8%B2_%D8%AD%D9%84%D9%82%D9%87_%D9%87%D8%A7%DB%8C_%D8%BA%DB%8C%D8%B1_%D8%B6%D8%B1%D9%88%D8%B1%DB%8C\" >5. \u0627\u062c\u062a\u0646\u0627\u0628 \u0627\u0632 \u062d\u0644\u0642\u0647 \u0647\u0627\u06cc \u063a\u06cc\u0631 \u0636\u0631\u0648\u0631\u06cc<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"1_%D8%A8%D9%87_%D8%AD%D8%AF%D8%A7%D9%82%D9%84_%D8%B1%D8%B3%D8%A7%D9%86%D8%AF%D9%86_%D9%85%D8%AA%D8%BA%DB%8C%D8%B1%D9%87%D8%A7%DB%8C_%D8%AC%D9%87%D8%A7%D9%86%DB%8C\"><\/span>\n<p>  1. \u0628\u0647 \u062d\u062f\u0627\u0642\u0644 \u0631\u0633\u0627\u0646\u062f\u0646 \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u062c\u0647\u0627\u0646\u06cc<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u06cc\u06a9\u06cc \u0627\u0632 \u0627\u0635\u0648\u0644 \u0627\u0633\u0627\u0633\u06cc \u0646\u0648\u0634\u062a\u0646 \u06a9\u062f \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u0628\u0647\u06cc\u0646\u0647\u060c \u0645\u062d\u062f\u0648\u062f \u06a9\u0631\u062f\u0646 \u062f\u0627\u0645\u0646\u0647 \u0645\u062a\u063a\u06cc\u0631\u0647\u0627 \u0627\u0633\u062a.  \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u0633\u0631\u0627\u0633\u0631\u06cc\u060c \u062f\u0631 \u062d\u0627\u0644\u06cc \u06a9\u0647 \u0631\u0627\u062d\u062a \u0647\u0633\u062a\u0646\u062f\u060c \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u0628\u0647 \u0633\u0631\u0639\u062a \u0641\u0636\u0627\u06cc \u0646\u0627\u0645 \u062c\u0647\u0627\u0646\u06cc \u0631\u0627 \u0628\u0647 \u0647\u0645 \u0631\u06cc\u062e\u062a\u0647 \u0648 \u0628\u0647 \u0637\u0648\u0631 \u0628\u0627\u0644\u0642\u0648\u0647 \u0645\u0646\u062c\u0631 \u0628\u0647 \u062a\u062f\u0627\u062e\u0644 \u0646\u0627\u0645\u06af\u0630\u0627\u0631\u06cc \u0648 \u0646\u0634\u062a \u062d\u0627\u0641\u0638\u0647 \u0634\u0648\u062f.  \u0639\u0644\u0627\u0648\u0647 \u0628\u0631 \u0627\u06cc\u0646\u060c \u0622\u0646\u0647\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u062f\u0631\u06a9 \u0648 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u06a9\u062f \u0634\u0645\u0627 \u0631\u0627 \u0633\u062e\u062a \u062a\u0631 \u06a9\u0646\u0646\u062f.<\/p>\n<p><strong>\u06a9\u062f \u0632\u06cc\u0631 \u0628\u0647\u06cc\u0646\u0647:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">var<\/span> <span class=\"nx\">globalVar<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">I am global!<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\n\n<span class=\"kd\">function<\/span> <span class=\"nx\">showGlobalVar<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">globalVar<\/span><span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"nx\">showGlobalVar<\/span><span class=\"p\">();<\/span>  <span class=\"c1\">\/\/ Outputs: \"I am global!\"<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>\u06a9\u062f \u0628\u0647\u06cc\u0646\u0647 \u0634\u062f\u0647:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">function<\/span> <span class=\"nx\">showLocalVar<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\n  <span class=\"kd\">var<\/span> <span class=\"nx\">localVar<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">I am local!<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">localVar<\/span><span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"nx\">showLocalVar<\/span><span class=\"p\">();<\/span>  <span class=\"c1\">\/\/ Outputs: \"I am local!\"<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>\u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u0645\u062d\u0644\u06cc\u060c \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u0645 \u06a9\u062f \u062e\u0648\u062f \u0631\u0627 \u062a\u0645\u06cc\u0632\u062a\u0631 \u0646\u06af\u0647 \u062f\u0627\u0631\u06cc\u0645\u060c \u0627\u0632 \u062a\u0636\u0627\u062f\u0647\u0627\u06cc \u0627\u062d\u062a\u0645\u0627\u0644\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u06a9\u0646\u06cc\u0645 \u0648 \u0645\u0646\u0627\u0628\u0639 \u062d\u0627\u0641\u0638\u0647 \u0631\u0627 \u062d\u0641\u0638 \u06a9\u0646\u06cc\u0645.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"2_%D8%A7%D8%B3%D8%AA%D9%81%D8%A7%D8%AF%D9%87_%D8%A7%D8%B2_const_%D9%88_let_%D8%A8%D8%B1_%D9%81%D8%B1%D8%A7%D8%B2_var\"><\/span>\n<p>  2. \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 <code>const<\/code> \u0648 <code>let<\/code> \u0628\u0631 \u0641\u0631\u0627\u0632 <code>var<\/code><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0642\u0628\u0644 \u0627\u0632 ES6\u060c \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u0641\u0642\u0637 \u062f\u0627\u0634\u062a <code>var<\/code> \u0628\u0631\u0627\u06cc \u0627\u0639\u0644\u0627\u0645 \u0645\u062a\u063a\u06cc\u0631\u0647\u0627  \u0628\u0627 \u0627\u06cc\u0646 \u062d\u0627\u0644\u060c <code>var<\/code> \u062f\u0627\u0631\u0627\u06cc \u0628\u0631\u062e\u06cc \u0648\u06cc\u0698\u06af\u06cc\u200c\u0647\u0627\u06cc \u0639\u062c\u06cc\u0628 \u0648 \u063a\u0631\u06cc\u0628 \u0627\u0633\u062a \u06a9\u0647 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0645\u0646\u062c\u0631 \u0628\u0647 \u0628\u0627\u06af\u200c\u0647\u0627\u06cc\u06cc \u062f\u0631 \u06a9\u062f \u0634\u0645\u0627 \u0634\u0648\u062f.  \u0628\u0647 \u0637\u0648\u0631 \u062e\u0627\u0635\u060c \u0645\u062d\u062f\u0648\u062f\u0647 \u0639\u0645\u0644\u06a9\u0631\u062f \u0627\u0633\u062a\u060c \u0646\u0647 \u0645\u062d\u062f\u0648\u062f\u0647 \u0628\u0644\u0648\u06a9\u060c \u06a9\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0645\u0646\u062c\u0631 \u0628\u0647 \u0631\u0641\u062a\u0627\u0631 \u063a\u06cc\u0631\u0645\u0646\u062a\u0638\u0631\u0647 \u0634\u0648\u062f.<\/p>\n<p><strong>\u06a9\u062f \u0632\u06cc\u0631 \u0628\u0647\u06cc\u0646\u0647:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">var<\/span> <span class=\"nx\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\n<span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"kc\">true<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"kd\">var<\/span> <span class=\"nx\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span><span class=\"p\">;<\/span>  <span class=\"c1\">\/\/ Same variable!<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">x<\/span><span class=\"p\">);<\/span>  <span class=\"c1\">\/\/ 20<\/span>\n<span class=\"p\">}<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">x<\/span><span class=\"p\">);<\/span>  <span class=\"c1\">\/\/ 20 - Oops, not what we expected!<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>\u06a9\u062f \u0628\u0647\u06cc\u0646\u0647 \u0634\u062f\u0647:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">let<\/span> <span class=\"nx\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\n<span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"kc\">true<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"kd\">let<\/span> <span class=\"nx\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span><span class=\"p\">;<\/span>  <span class=\"c1\">\/\/ A different variable<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">x<\/span><span class=\"p\">);<\/span>  <span class=\"c1\">\/\/ 20<\/span>\n<span class=\"p\">}<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">x<\/span><span class=\"p\">);<\/span>  <span class=\"c1\">\/\/ 10 - That's more like it!<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>\u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 <code>let<\/code> \u0648 <code>const<\/code> \u0628\u0631\u0627\u06cc \u062a\u0639\u06cc\u06cc\u0646 \u0645\u062d\u062f\u0648\u062f\u0647\u060c \u0645\u0627 \u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u0645\u06cc\u200c\u062f\u0647\u06cc\u0645 \u06a9\u0647 \u0645\u062a\u063a\u06cc\u0631\u0647\u0627\u06cc \u0645\u0627 \u0641\u0642\u0637 \u062f\u0631 \u062c\u0627\u06cc\u06cc \u06a9\u0647 \u0642\u0631\u0627\u0631 \u0627\u0633\u062a \u0648\u062c\u0648\u062f \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u0646\u062f\u060c \u0627\u0632 \u0628\u0631\u0648\u0632 \u0627\u0634\u06a9\u0627\u0644 \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0645\u06cc\u200c\u06a9\u0646\u062f \u0648 \u062e\u0648\u0627\u0646\u062f\u0646 \u0648 \u062f\u0631\u06a9 \u06a9\u062f \u0645\u0627 \u0631\u0627 \u0622\u0633\u0627\u0646\u200c\u062a\u0631 \u0645\u06cc\u200c\u06a9\u0646\u062f.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"3_%D8%A7%D9%86%D8%AA%D8%AE%D8%A7%D8%A8_%D8%A8%D8%B1%D8%A7%DB%8C_%D8%A8%D8%B1%D8%B1%D8%B3%DB%8C_%D8%AF%D9%82%DB%8C%D9%82_%D8%A8%D8%B1%D8%A7%D8%A8%D8%B1%DB%8C\"><\/span>\n<p>  3. \u0627\u0646\u062a\u062e\u0627\u0628 \u0628\u0631\u0627\u06cc \u0628\u0631\u0631\u0633\u06cc \u062f\u0642\u06cc\u0642 \u0628\u0631\u0627\u0628\u0631\u06cc<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062f\u0631 \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a\u060c \u0628\u0647 \u0637\u0648\u0631 \u06a9\u0644\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0628\u0631\u0627\u0628\u0631\u06cc \u062f\u0642\u06cc\u0642 \u06a9\u0627\u0631\u0622\u0645\u062f\u062a\u0631 \u0627\u0633\u062a (<code>===<\/code>) \u0628\u06cc\u0634 \u0627\u0632 \u0628\u0631\u0627\u0628\u0631\u06cc \u0633\u0633\u062a (<code>==<\/code>).  \u0628\u0631\u0627\u0628\u0631\u06cc \u0636\u0639\u06cc\u0641 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0645\u0646\u062c\u0631 \u0628\u0647 \u0646\u062a\u0627\u06cc\u062c \u06af\u0645\u0631\u0627\u0647 \u06a9\u0646\u0646\u062f\u0647 \u0628\u0627\u0644\u0642\u0648\u0647 \u0646\u0627\u0634\u06cc \u0627\u0632 \u0627\u062c\u0628\u0627\u0631 \u0646\u0648\u0639 \u0634\u0648\u062f.  \u0639\u0644\u0627\u0648\u0647 \u0628\u0631 \u0627\u06cc\u0646\u060c \u0628\u0631\u0631\u0633\u06cc\u200c\u0647\u0627\u06cc \u062f\u0642\u06cc\u0642 \u0628\u0631\u0627\u0628\u0631\u06cc \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u0633\u0631\u06cc\u0639\u200c\u062a\u0631 \u0627\u062c\u0631\u0627 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f \u0632\u06cc\u0631\u0627 \u0646\u06cc\u0627\u0632\u06cc \u0628\u0647 \u062a\u0628\u062f\u06cc\u0644 \u0646\u0648\u0639 \u0646\u062f\u0627\u0631\u0646\u062f.<\/p>\n<p><strong>\u06a9\u062f \u0632\u06cc\u0631 \u0628\u0647\u06cc\u0646\u0647:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">var<\/span> <span class=\"nx\">x<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">5<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\n<span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nx\">x<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">5<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>  <span class=\"c1\">\/\/ This will execute<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Loose equality<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>\u06a9\u062f \u0628\u0647\u06cc\u0646\u0647 \u0634\u062f\u0647:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">var<\/span> <span class=\"nx\">x<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">5<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\n<span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nx\">x<\/span> <span class=\"o\">===<\/span> <span class=\"mi\">5<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>  <span class=\"c1\">\/\/ This won't execute<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Strict equality<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>\u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0628\u0631\u0627\u0628\u0631\u06cc \u062f\u0642\u06cc\u0642\u060c \u0627\u0632 \u062a\u0628\u062f\u06cc\u0644\u200c\u0647\u0627\u06cc \u063a\u06cc\u0631 \u0636\u0631\u0648\u0631\u06cc \u0646\u0648\u0639 \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645 \u0648 \u0645\u0642\u0627\u06cc\u0633\u0647\u200c\u0647\u0627\u06cc \u062e\u0648\u062f \u0631\u0627 \u0633\u0631\u06cc\u0639\u200c\u062a\u0631 \u0648 \u06a9\u0645\u062a\u0631 \u0645\u0633\u062a\u0639\u062f \u0627\u0634\u06a9\u0627\u0644\u0627\u062a \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"4_%D8%A7%D9%86%D8%AA%D8%AE%D8%A7%D8%A8_%D8%B3%D8%A7%D8%AE%D8%AA%D8%A7%D8%B1_%D8%AF%D8%A7%D8%AF%D9%87_%D9%85%D9%86%D8%A7%D8%B3%D8%A8\"><\/span>\n<p>  4. \u0627\u0646\u062a\u062e\u0627\u0628 \u0633\u0627\u062e\u062a\u0627\u0631 \u062f\u0627\u062f\u0647 \u0645\u0646\u0627\u0633\u0628<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u0633\u0627\u062e\u062a\u0627\u0631\u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u0645\u062e\u062a\u0644\u0641\u06cc \u0631\u0627 \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc \u062f\u0647\u062f \u06a9\u0647 \u0647\u0631 \u06a9\u062f\u0627\u0645 \u0645\u0632\u0627\u06cc\u0627 \u0648 \u0645\u0639\u0627\u06cc\u0628 \u062e\u0648\u062f \u0631\u0627 \u062f\u0627\u0631\u0646\u062f.  \u062f\u0627\u0646\u0633\u062a\u0646 \u0632\u0645\u0627\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0622\u0646 \u0628\u0631\u0627\u06cc \u0646\u0648\u0634\u062a\u0646 \u06a9\u062f \u0639\u0645\u0644\u06a9\u0631\u062f\u06cc \u0628\u0633\u06cc\u0627\u0631 \u0645\u0647\u0645 \u0627\u0633\u062a.  \u0628\u06cc\u0627\u06cc\u06cc\u062f \u0622\u0631\u0627\u06cc\u0647 \u0631\u0627 \u0645\u0642\u0627\u06cc\u0633\u0647 \u06a9\u0646\u06cc\u0645 \u0648 \u0633\u0627\u062e\u062a\u0627\u0631\u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u0631\u0627 \u0628\u0631\u0627\u06cc \u06cc\u06a9 \u0639\u0645\u0644\u06cc\u0627\u062a \u0628\u0631\u0631\u0633\u06cc \u0648\u062c\u0648\u062f\u06cc \u062a\u0646\u0638\u06cc\u0645 \u06a9\u0646\u06cc\u0645.<\/p>\n<p><strong>\u06a9\u062f \u0632\u06cc\u0631 \u0628\u0647\u06cc\u0646\u0647:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">let<\/span> <span class=\"nx\">arr<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">,<\/span> <span class=\"mi\">4<\/span><span class=\"p\">,<\/span> <span class=\"mi\">5<\/span><span class=\"p\">];<\/span>\n<span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nx\">arr<\/span><span class=\"p\">.<\/span><span class=\"nx\">includes<\/span><span class=\"p\">(<\/span><span class=\"mi\">4<\/span><span class=\"p\">))<\/span> <span class=\"p\">{<\/span>  <span class=\"c1\">\/\/ O(n) time complexity<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span>\n\n<span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Number exists in array<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>\u06a9\u062f \u0628\u0647\u06cc\u0646\u0647 \u0634\u062f\u0647:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">let<\/span> <span class=\"nx\">mySet<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nb\">Set<\/span><span class=\"p\">([<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">,<\/span> <span class=\"mi\">4<\/span><span class=\"p\">,<\/span> <span class=\"mi\">5<\/span><span class=\"p\">]);<\/span>\n<span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nx\">mySet<\/span><span class=\"p\">.<\/span><span class=\"nx\">has<\/span><span class=\"p\">(<\/span><span class=\"mi\">4<\/span><span class=\"p\">))<\/span> <span class=\"p\">{<\/span>  <span class=\"c1\">\/\/ O(1) time complexity<\/span>\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Number exists in set<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u0645\u062b\u0627\u0644\u060c <code>Set<\/code> \u0628\u0631\u0627\u06cc \u0628\u0631\u0631\u0633\u06cc \u0648\u062c\u0648\u062f \u06a9\u0627\u0631\u0622\u0645\u062f\u062a\u0631 \u0627\u0633\u062a \u0632\u06cc\u0631\u0627 \u067e\u06cc\u0686\u06cc\u062f\u06af\u06cc \u0632\u0645\u0627\u0646\u06cc O(1) \u0628\u0631\u0627\u06cc \u0622\u0646 \u062f\u0627\u0631\u062f <code>.has()<\/code> \u0631\u0648\u0634\u060c \u062f\u0631 \u0645\u0642\u0627\u06cc\u0633\u0647 \u0628\u0627 \u06cc\u06a9 \u0622\u0631\u0627\u06cc\u0647 <code>.includes()<\/code> \u06a9\u0647 \u067e\u06cc\u0686\u06cc\u062f\u06af\u06cc \u0632\u0645\u0627\u0646\u06cc O(n) \u062f\u0627\u0631\u062f.  \u0627\u0644\u0628\u062a\u0647 \u0627\u06cc\u0646 \u0628\u062f\u0627\u0646 \u0645\u0639\u0646\u0627 \u0646\u06cc\u0633\u062a \u06a9\u0647 \u0647\u0645\u06cc\u0634\u0647 \u0628\u0627\u06cc\u062f \u0627\u0632 \u06cc\u06a9 \u0645\u062c\u0645\u0648\u0639\u0647 \u0628\u0647 \u062c\u0627\u06cc \u0622\u0631\u0627\u06cc\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f\u060c \u0627\u0645\u0627 \u0645\u0647\u0645 \u0627\u0633\u062a \u06a9\u0647 \u0627\u0628\u0632\u0627\u0631 \u0645\u0646\u0627\u0633\u0628 \u0631\u0627 \u0628\u0631\u0627\u06cc \u06a9\u0627\u0631 \u0645\u0646\u0627\u0633\u0628 \u0627\u0646\u062a\u062e\u0627\u0628 \u06a9\u0646\u06cc\u062f.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"5_%D8%A7%D8%AC%D8%AA%D9%86%D8%A7%D8%A8_%D8%A7%D8%B2_%D8%AD%D9%84%D9%82%D9%87_%D9%87%D8%A7%DB%8C_%D8%BA%DB%8C%D8%B1_%D8%B6%D8%B1%D9%88%D8%B1%DB%8C\"><\/span>\n<p>  5. \u0627\u062c\u062a\u0646\u0627\u0628 \u0627\u0632 \u062d\u0644\u0642\u0647 \u0647\u0627\u06cc \u063a\u06cc\u0631 \u0636\u0631\u0648\u0631\u06cc<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062d\u0644\u0642\u0647 \u0647\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u0646\u062f \u067e\u0631\u0647\u0632\u06cc\u0646\u0647 \u0628\u0627\u0634\u0646\u062f\u060c \u0628\u0647 \u062e\u0635\u0648\u0635 \u0627\u06af\u0631 \u062f\u0631 \u062d\u0627\u0644 \u062a\u06a9\u0631\u0627\u0631 \u0631\u0648\u06cc \u0645\u062c\u0645\u0648\u0639\u0647 \u062f\u0627\u062f\u0647 \u0647\u0627\u06cc \u0628\u0632\u0631\u06af \u0647\u0633\u062a\u06cc\u062f.  \u0628\u06cc\u0627\u06cc\u06cc\u062f \u0633\u0646\u0627\u0631\u06cc\u0648\u06cc\u06cc \u0631\u0627 \u0645\u0642\u0627\u06cc\u0633\u0647 \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u062f\u0631 \u0622\u0646 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u0645 \u06cc\u06a9 \u062d\u0644\u0642\u0647 \u0631\u0627 \u0628\u0627 \u06cc\u06a9 \u0645\u062a\u062f \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u062f\u0627\u062e\u0644\u06cc \u062c\u0627\u06cc\u06af\u0632\u06cc\u0646 \u06a9\u0646\u06cc\u0645.<\/p>\n<p><strong>\u06a9\u062f \u0632\u06cc\u0631 \u0628\u0647\u06cc\u0646\u0647:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">let<\/span> <span class=\"nx\">arr<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">,<\/span> <span class=\"mi\">4<\/span><span class=\"p\">,<\/span> <span class=\"mi\">5<\/span><span class=\"p\">];<\/span>\n<span class=\"kd\">let<\/span> <span class=\"nx\">sum<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\n<span class=\"k\">for<\/span> <span class=\"p\">(<\/span><span class=\"kd\">let<\/span> <span class=\"nx\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span> <span class=\"nx\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"nx\">arr<\/span><span class=\"p\">.<\/span><span class=\"nx\">length<\/span><span class=\"p\">;<\/span> <span class=\"nx\">i<\/span><span class=\"o\">++<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\n    <span class=\"nx\">sum<\/span> <span class=\"o\">+=<\/span> <span class=\"nx\">arr<\/span><span class=\"p\">[<\/span><span class=\"nx\">i<\/span><span class=\"p\">];<\/span>\n<span class=\"p\">}<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">sum<\/span><span class=\"p\">);<\/span>  <span class=\"c1\">\/\/ Outputs: 15<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>\u06a9\u062f \u0628\u0647\u06cc\u0646\u0647 \u0634\u062f\u0647:<\/strong><\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">let<\/span> <span class=\"nx\">arr<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">,<\/span> <span class=\"mi\">4<\/span><span class=\"p\">,<\/span> <span class=\"mi\">5<\/span><span class=\"p\">];<\/span>\n<span class=\"kd\">let<\/span> <span class=\"nx\">sum<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">arr<\/span><span class=\"p\">.<\/span><span class=\"nx\">reduce<\/span><span class=\"p\">((<\/span><span class=\"nx\">a<\/span><span class=\"p\">,<\/span> <span class=\"nx\">b<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">a<\/span> <span class=\"o\">+<\/span> <span class=\"nx\">b<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">);<\/span>\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">sum<\/span><span class=\"p\">);<\/span>  <span class=\"c1\">\/\/ Outputs: 15<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u0645\u062b\u0627\u0644\u060c <code>reduce<\/code> \u0627\u06cc\u0646 \u0631\u0648\u0634 \u06a9\u062f \u0645\u0627 \u0631\u0627 \u062e\u0648\u0627\u0646\u0627\u062a\u0631 \u0648 \u0645\u062e\u062a\u0635\u0631\u062a\u0631 \u0645\u06cc \u06a9\u0646\u062f.  \u0628\u0627 \u0627\u06cc\u0646 \u062d\u0627\u0644\u060c \u0634\u0627\u06cc\u0627\u0646 \u0630\u06a9\u0631 \u0627\u0633\u062a \u06a9\u0647 \u062f\u0631 \u062d\u0627\u0644\u06cc \u06a9\u0647 \u0627\u06cc\u0646 \u0631\u0648\u06cc\u06a9\u0631\u062f \u06a9\u062f \u0634\u0645\u0627 \u0631\u0627 \u067e\u0627\u06a9\u200c\u062a\u0631 \u0645\u06cc\u200c\u06a9\u0646\u062f\u060c \u0639\u0645\u0644\u06a9\u0631\u062f \u062a\u0642\u0631\u06cc\u0628\u0627\u064b \u06cc\u06a9\u0633\u0627\u0646 \u0627\u0633\u062a.  \u06af\u0627\u0647\u06cc \u0627\u0648\u0642\u0627\u062a\u060c \u0628\u0647\u06cc\u0646\u0647\u200c\u0633\u0627\u0632\u06cc \u0628\u06cc\u0634\u062a\u0631 \u0628\u0647 \u0646\u0648\u0634\u062a\u0646 \u06a9\u062f\u0647\u0627\u06cc \u067e\u0627\u06a9\u200c\u062a\u0631 \u0648 \u0642\u0627\u0628\u0644 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc\u200c\u062a\u0631 \u0645\u0631\u0628\u0648\u0637 \u0645\u06cc\u200c\u0634\u0648\u062f \u062a\u0627 \u0622\u062e\u0631\u06cc\u0646 \u0627\u0641\u062a \u0639\u0645\u0644\u06a9\u0631\u062f.<\/p>\n<p>\u062f\u0631 \u0646\u062a\u06cc\u062c\u0647\u060c \u0646\u0648\u0634\u062a\u0646 \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u0634\u062f\u0647 \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0627\u0632 \u062f\u0631\u06a9 \u062a\u0641\u0627\u0648\u062a \u0647\u0627\u06cc \u0638\u0631\u06cc\u0641 \u0632\u0628\u0627\u0646\u060c \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0647\u0648\u0634\u0645\u0646\u062f\u0627\u0646\u0647 \u0627\u0632 \u0648\u06cc\u0698\u06af\u06cc \u0647\u0627\u06cc \u0645\u062f\u0631\u0646 \u0648 \u0627\u0646\u062a\u062e\u0627\u0628 \u0633\u0627\u062e\u062a\u0627\u0631\u0647\u0627 \u0648 \u0633\u0627\u062e\u062a\u0627\u0631\u0647\u0627\u06cc \u062f\u0627\u062f\u0647 \u0645\u0646\u0627\u0633\u0628 \u0627\u0633\u062a.  \u0639\u0645\u0644\u06a9\u0631\u062f \u0628\u0633\u06cc\u0627\u0631 \u0645\u0647\u0645 \u0627\u0633\u062a\u060c \u0627\u0645\u0627 \u0646\u0648\u0634\u062a\u0646 \u06a9\u062f \u062a\u0645\u06cc\u0632\u060c \u0642\u0627\u0628\u0644 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0648 \u0642\u0627\u0628\u0644 \u062f\u0631\u06a9 \u0628\u0647 \u0647\u0645\u0627\u0646 \u0627\u0646\u062f\u0627\u0632\u0647 \u0645\u0647\u0645 \u0627\u0633\u062a.  \u0628\u0686\u0647 \u0647\u0627 \u0628\u0631\u0646\u0627\u0645\u0647 \u0646\u0648\u06cc\u0633\u06cc \u0645\u0628\u0627\u0631\u06a9\u060c \u0627\u0632 \u062e\u0648\u0627\u0646\u062f\u0646 \u0627\u06cc\u0646 \u0645\u0637\u0644\u0628 \u0645\u062a\u0634\u06a9\u0631\u0645!<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u0628\u0647\u06cc\u0646\u0647 \u0633\u0627\u0632\u06cc \u062f\u0631 \u0642\u0644\u0628 \u0627\u06cc\u062c\u0627\u062f \u06cc\u06a9 \u062a\u062c\u0631\u0628\u0647 \u06a9\u0627\u0631\u0628\u0631\u06cc \u0631\u0648\u0627\u0646\u060c \u06a9\u0627\u0631\u0622\u0645\u062f \u0648 \u0644\u0630\u062a \u0628\u062e\u0634 \u0627\u0633\u062a. \u0648\u0642\u062a\u06cc \u0635\u062d\u0628\u062a \u0627\u0632 \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u0645\u06cc \u0634\u0648\u062f\u060c \u0632\u0628\u0627\u0646\u06cc \u06a9\u0647 \u0628\u0647 \u067e\u0648\u06cc\u0627\u06cc\u06cc \u0648 \u062a\u0637\u0628\u06cc\u0642 \u067e\u0630\u06cc\u0631\u06cc \u0627\u0634 \u0645\u0639\u0631\u0648\u0641 \u0627\u0633\u062a\u060c \u0646\u0648\u0634\u062a\u0646 \u06a9\u062f \u0628\u0647\u06cc\u0646\u0647 \u0628\u0647 \u06cc\u06a9 \u06a9\u0627\u0631 \u062c\u0627\u0644\u0628 \u062a\u0628\u062f\u06cc\u0644 \u0645\u06cc \u0634\u0648\u062f. \u0627\u06cc\u0646 \u0645\u0642\u0627\u0644\u0647 \u0646\u062d\u0648\u0647 \u0646\u0648\u0634\u062a\u0646 \u06a9\u062f \u062c\u0627\u0648\u0627 \u0627\u0633\u06a9\u0631\u06cc\u067e\u062a \u06a9\u0627\u0631\u0622\u0645\u062f\u060c \u0627\u0632 \u062c\u0645\u0644\u0647 \u0628\u0631\u062e\u06cc \u0627\u0632 \u0645\u0634\u06a9\u0644\u0627\u062a \u0631\u0627\u06cc\u062c &hellip;<\/p>\n","protected":false},"author":2,"featured_media":27867,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[339],"tags":[],"class_list":["post-27866","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dev"],"_links":{"self":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/27866","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/comments?post=27866"}],"version-history":[{"count":0,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/27866\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media\/27867"}],"wp:attachment":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media?parent=27866"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/categories?post=27866"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/tags?post=27866"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}