{"id":99287,"date":"2025-02-27T09:40:41","date_gmt":"2025-02-27T06:10:41","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/javascript-non-mutating-array-methods-filter-map-slice-concat-1ndb\/"},"modified":"2025-02-27T09:40:41","modified_gmt":"2025-02-27T06:10:41","slug":"javascript-non-mutating-array-methods-filter-map-slice-concat-1ndb","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/javascript-non-mutating-array-methods-filter-map-slice-concat-1ndb\/","title":{"rendered":"JS | \u0622\u0631\u0627\u06cc\u0647 \u063a\u06cc\u0631 \u0645\u062a\u0645\u0627\u06cc\u0632: \u0641\u06cc\u0644\u062a\u0631 \u060c \u0646\u0642\u0634\u0647 \u060c \u0628\u0631\u0634 \u060c Concat \u062a\u0648\u0636\u06cc\u062d \u062f\u0627\u062f\u0647 \u0634\u062f\u0647!"},"content":{"rendered":"<div data-article-id=\"2300189\" id=\"article-body\">\n<p>\u0633\u0644\u0627\u0645 \u062f\u0648\u0633\u062a\u0627\u0646 \u062a\u0648\u0633\u0639\u0647 \u062f\u0647\u0646\u062f\u0647 \u0647\u0645\u06a9\u0627\u0631 \u0645\u0646 \u060c \u0627\u0645\u0631\u0648\u0632 \u062f\u0631 \u0645\u0648\u0631\u062f \u0631\u0648\u0634\u0647\u0627\u06cc \u0622\u0631\u0627\u06cc\u0647 \u062f\u0631 \u0645\u0648\u0631\u062f \u0627\u0633\u062a\u0631\u0648\u0626\u06cc\u062f\u0647\u0627 \u0628\u062d\u062b \u062e\u0648\u0627\u0647\u0645 \u06a9\u0631\u062f. \u0634\u0645\u0627 \u0628\u0627\u06cc\u062f \u06a9\u0645\u0631\u0628\u0646\u062f \u0627\u06cc\u0645\u0646\u06cc \u062e\u0648\u062f \u0631\u0627 \u062f\u0633\u062a \u0648 \u067e\u0646\u062c\u0647 \u0646\u0631\u0645 \u06a9\u0646\u06cc\u062f \u0632\u06cc\u0631\u0627 \u0627\u06cc\u0646 \u0633\u0641\u0631 \u06a9\u0645\u06cc \u0637\u0648\u0644\u0627\u0646\u06cc \u062e\u0648\u0627\u0647\u062f \u0628\u0648\u062f.<\/p>\n<ul>\n<li>\u0645\u0646 \u0627\u0628\u062a\u062f\u0627 \u0642\u0637\u0639\u0647 \u0647\u0627\u06cc \u06a9\u062f \u062e\u0648\u062f \u0631\u0627 \u0628\u0631 \u0631\u0648\u06cc scribbler.live \u0627\u06cc\u062c\u0627\u062f \u0645\u06cc \u06a9\u0646\u0645 \u060c \u06a9\u0647 \u06cc\u06a9 \u0628\u0633\u062a\u0631 \u062e\u0627\u0631\u0642 \u0627\u0644\u0639\u0627\u062f\u0647 \u0627\u0633\u062a \u06a9\u0647 \u0628\u0647 \u0634\u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u0628\u062f\u0648\u0646 \u0646\u06cc\u0627\u0632 \u0628\u0647 \u062a\u0646\u0638\u06cc\u0645 \u062f\u0633\u062a\u06cc \u060c \u06cc\u06a9 \u0646\u0648\u062a \u0628\u0648\u06a9 JavaScript \u060c \u06a9\u0627\u0645\u067e\u0627\u06cc\u0644\u0631 \u0622\u0646\u0644\u0627\u06cc\u0646 \u0648 \u0648\u06cc\u0631\u0627\u06cc\u0634\u06af\u0631 \u0631\u0627 \u0627\u062c\u0631\u0627 \u06a9\u0646\u06cc\u062f.<\/li>\n<li>\u0639\u0644\u0627\u0648\u0647 \u0628\u0631 \u0627\u06cc\u0646 \u060c \u0645\u0646 \u067e\u06cc\u0648\u0646\u062f\u06cc \u0628\u0647 \u0642\u0637\u0639\u0647 \u0647\u0627\u06cc \u06a9\u062f \u0631\u0627 \u0634\u0627\u0645\u0644 \u0645\u06cc \u0634\u0648\u0645 \u06a9\u0647 \u0634\u0627\u0645\u0644 \u062a\u0645\u0627\u0645 \u0646\u0645\u0648\u0646\u0647 \u0647\u0627\u06cc \u06a9\u062f \u0627\u0633\u062a \u062a\u0627 \u0628\u062a\u0648\u0627\u0646\u06cc\u062f \u0642\u0637\u0639\u0647 \u0631\u0627 \u0628\u0627\u0632 \u06a9\u0631\u062f\u0647 \u0648 \u062e\u0648\u062f\u062a\u0627\u0646 \u0622\u0646 \u0631\u0627 \u0627\u062c\u0631\u0627 \u06a9\u0646\u06cc\u062f \u062a\u0627 \u0646\u062a\u0627\u06cc\u062c \u0631\u0627 \u0628\u0628\u06cc\u0646\u06cc\u062f.<\/li>\n<li>\u0645\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u062e\u0648\u0627\u0647\u0645 \u06a9\u0631\u062f <code>scrib.show<\/code> \u0627\u0632 scribbler.live \u060c \u0645\u0639\u0627\u062f\u0644 \u0622\u0646 \u0627\u0633\u062a <code>console.log<\/code>\n<\/li>\n<\/ul>\n<p>\u0628\u06cc\u0627\u06cc\u06cc\u062f \u0634\u06cc\u0631\u062c\u0647 \u0628\u0632\u0646\u06cc\u0645.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 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=\"Toggle Table of Content\"><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\/javascript-non-mutating-array-methods-filter-map-slice-concat-1ndb\/#%D9%81%D9%87%D8%B1%D8%B3%D8%AA_%D9%85%D8%B7%D8%A7%D9%84%D8%A8\" >\u0641\u0647\u0631\u0633\u062a \u0645\u0637\u0627\u0644\u0628<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nabfollower.com\/blog\/javascript-non-mutating-array-methods-filter-map-slice-concat-1ndb\/#%D8%B1%D9%88%D8%B4%D9%87%D8%A7%DB%8C_%D8%BA%DB%8C%D8%B1_%D8%AC%D9%87%D8%B4_%DB%8C%D8%A7%D9%81%D8%AA%D9%87\" >\u0631\u0648\u0634\u0647\u0627\u06cc \u063a\u06cc\u0631 \u062c\u0647\u0634 \u06cc\u0627\u0641\u062a\u0647<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nabfollower.com\/blog\/javascript-non-mutating-array-methods-filter-map-slice-concat-1ndb\/#%D8%B1%D9%85%D8%B2_%D9%86%D9%85%D9%88%D9%86%D9%87\" >\u0631\u0645\u0632 \u0646\u0645\u0648\u0646\u0647<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nabfollower.com\/blog\/javascript-non-mutating-array-methods-filter-map-slice-concat-1ndb\/#%D8%B2%D9%86%D8%AC%DB%8C%D8%B1_%DA%A9%D8%B1%D8%AF%D9%86_%D8%B1%D9%88%D8%B4%D9%87%D8%A7\" >\u0632\u0646\u062c\u06cc\u0631 \u06a9\u0631\u062f\u0646 \u0631\u0648\u0634\u0647\u0627<\/a><\/li><\/ul><\/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\/javascript-non-mutating-array-methods-filter-map-slice-concat-1ndb\/#%D8%B4%D9%85%D8%A7_%D9%85%DB%8C_%D8%AA%D9%88%D8%A7%D9%86%DB%8C%D8%AF_%D8%A8%D8%A7_%D9%85%D9%86_%D8%AA%D9%85%D8%A7%D8%B3_%D8%A8%DA%AF%DB%8C%D8%B1%DB%8C%D8%AF_%E2%80%93\" >\u0634\u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0628\u0627 \u0645\u0646 \u062a\u0645\u0627\u0633 \u0628\u06af\u06cc\u0631\u06cc\u062f &#8211;<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%D9%81%D9%87%D8%B1%D8%B3%D8%AA_%D9%85%D8%B7%D8%A7%D9%84%D8%A8\"><\/span>\n<p>  \u0641\u0647\u0631\u0633\u062a \u0645\u0637\u0627\u0644\u0628<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"%D8%B1%D9%88%D8%B4%D9%87%D8%A7%DB%8C_%D8%BA%DB%8C%D8%B1_%D8%AC%D9%87%D8%B4_%DB%8C%D8%A7%D9%81%D8%AA%D9%87\"><\/span>\n<p>  \u0631\u0648\u0634\u0647\u0627\u06cc \u063a\u06cc\u0631 \u062c\u0647\u0634 \u06cc\u0627\u0641\u062a\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0627\u06cc\u0646 \u0631\u0648\u0634 \u0647\u0627 \u0622\u0631\u0627\u06cc\u0647 \u0627\u0635\u0644\u06cc \u0631\u0627 \u062a\u063a\u06cc\u06cc\u0631 \u0646\u0645\u06cc \u062f\u0647\u062f \u0628\u0644\u06a9\u0647 \u0622\u0631\u0627\u06cc\u0647 \u062c\u062f\u06cc\u062f\u06cc \u0631\u0627 \u0628\u0631\u0627\u06cc \u0646\u062a\u06cc\u062c\u0647 \u0627\u06cc\u062c\u0627\u062f \u0645\u06cc \u06a9\u0646\u062f \u060c \u0627\u06cc\u0646 \u0645\u0648\u0627\u0631\u062f \u0634\u0627\u0645\u0644:<\/p>\n<ul>\n<li>\n<code>filter<\/code>  &#8211; \u06cc\u06a9 \u0622\u0631\u0627\u06cc\u0647 \u0631\u0627 \u0628\u0631 \u0627\u0633\u0627\u0633 \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0627\u0633\u062e \u0628\u0647 \u062a\u0645\u0627\u0633 \u0641\u06cc\u0644\u062a\u0631 \u0645\u06cc \u06a9\u0646\u062f<\/li>\n<li>\n<code>map<\/code>  &#8211; \u0628\u0631 \u0627\u0633\u0627\u0633 \u06cc\u06a9 \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0627\u0633\u062e \u0628\u0647 \u062a\u0645\u0627\u0633 \u060c \u0627\u0632 \u0622\u0631\u0627\u06cc\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f<\/li>\n<li>\n<code>slice<\/code>  &#8211; \u0628\u062e\u0634\u06cc \u0627\u0632 \u0622\u0631\u0627\u06cc\u0647 \u0631\u0627 \u0627\u0633\u062a\u062e\u0631\u0627\u062c \u06a9\u0646\u06cc\u062f<\/li>\n<li>\n<code>concat<\/code>  &#8211; \u0627\u062f\u063a\u0627\u0645 2 \u0622\u0631\u0627\u06cc\u0647<\/li>\n<li>\n<code>flat<\/code>  &#8211; \u0622\u0631\u0627\u06cc\u0647 \u0647\u0627\u06cc \u0686\u0646\u062f \u0628\u0639\u062f\u06cc \u06cc\u0627 \u062a\u0648 \u062f\u0631 \u062a\u0648 \u0631\u0627 \u0635\u0627\u0641 \u06a9\u0646\u06cc\u062f<\/li>\n<li>\n<code>flatMap<\/code>  &#8211; \u0622\u0631\u0627\u06cc\u0647 \u0647\u0627\u06cc \u0686\u0646\u062f \u0628\u0639\u062f\u06cc \u06cc\u0627 \u062a\u0648 \u062f\u0631 \u062a\u0648 \u0631\u0627 \u0628\u0627 1 \u0633\u0637\u062d \u0635\u0627\u0641 \u06a9\u0646\u06cc\u062f \u0648 \u0646\u0642\u0634\u0647 \u0628\u0631\u062f\u0627\u0631\u06cc \u0631\u0627 \u0628\u0627 \u0639\u0645\u0644\u06a9\u0631\u062f \u067e\u0627\u0633\u062e \u0628\u0647 \u062a\u0645\u0627\u0633 \u0628\u0627 \u0622\u0646 \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u06cc\u062f.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"%D8%B1%D9%85%D8%B2_%D9%86%D9%85%D9%88%D9%86%D9%87\"><\/span>\n<p>  \u0631\u0645\u0632 \u0646\u0645\u0648\u0646\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">technologies<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">HTML<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Frontend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">CSS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Frontend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">JS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Frontend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">React<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Frontend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Java<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Backend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Node<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Backend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n<span class=\"p\">]<\/span>\n\n<span class=\"kd\">const<\/span> <span class=\"nx\">otherTechnologies<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Python<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Backend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Rust<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Backend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n<span class=\"p\">]<\/span>\n\n<span class=\"c1\">\/\/ filter method<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">frontendTechs<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">technologies<\/span><span class=\"p\">.<\/span><span class=\"nf\">filter<\/span><span class=\"p\">(<\/span><span class=\"nx\">technology<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\n  <span class=\"k\">if<\/span><span class=\"p\">(<\/span><span class=\"nx\">technology<\/span><span class=\"p\">.<\/span><span class=\"nx\">type<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">Frontend<\/span><span class=\"dl\">\"<\/span><span class=\"p\">){<\/span>\n    <span class=\"k\">return<\/span> <span class=\"nx\">technology<\/span>\n  <span class=\"p\">}<\/span>\n<span class=\"p\">})<\/span>\n<span class=\"nx\">scrib<\/span><span class=\"p\">.<\/span><span class=\"nf\">show<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Frontend techs - <\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"nx\">frontendTechs<\/span><span class=\"p\">)<\/span> <span class=\"c1\">\/\/ will return an array with items with type Frontend<\/span>\n\n<span class=\"c1\">\/\/ map method<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">frontendTechsNames<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">frontendTechs<\/span><span class=\"p\">.<\/span><span class=\"nf\">map<\/span><span class=\"p\">(<\/span><span class=\"nx\">technology<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">technology<\/span><span class=\"p\">.<\/span><span class=\"nx\">name<\/span><span class=\"p\">)<\/span> <span class=\"c1\">\/\/ will return an array with technology names with type Frontend<\/span>\n<span class=\"nx\">scrib<\/span><span class=\"p\">.<\/span><span class=\"nf\">show<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Frontend tech names - <\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"nx\">frontendTechsNames<\/span><span class=\"p\">)<\/span> <span class=\"c1\">\/\/ will return an array with items with type Frontend<\/span>\n\n\n<span class=\"c1\">\/\/ slice method<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">firstThreeItems<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">technologies<\/span><span class=\"p\">.<\/span><span class=\"nf\">slice<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">)<\/span> <span class=\"c1\">\/\/ first three items in the array<\/span>\n<span class=\"nx\">scrib<\/span><span class=\"p\">.<\/span><span class=\"nf\">show<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">First three items - <\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"nx\">firstThreeItems<\/span><span class=\"p\">)<\/span>\n\n<span class=\"c1\">\/\/ concat method<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">combinedTechnologies<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">technologies<\/span><span class=\"p\">.<\/span><span class=\"nf\">concat<\/span><span class=\"p\">(<\/span><span class=\"nx\">otherTechnologies<\/span><span class=\"p\">)<\/span>\n<span class=\"nx\">scrib<\/span><span class=\"p\">.<\/span><span class=\"nf\">show<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Combined technologies - <\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"nx\">combinedTechnologies<\/span><span class=\"p\">)<\/span>\n\n<span class=\"c1\">\/\/ flat method<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">nestedArrays<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">HTML<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">CSS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">JS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">REACT<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">NEXTJS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">TAILWIND<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">SCSS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">]]]]<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">oneLevelFlat<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">nestedArrays<\/span><span class=\"p\">.<\/span><span class=\"nf\">flat<\/span><span class=\"p\">()<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">twoLevelFlat<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">nestedArrays<\/span><span class=\"p\">.<\/span><span class=\"nf\">flat<\/span><span class=\"p\">(<\/span><span class=\"mi\">2<\/span><span class=\"p\">)<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">infinityLevelFlat<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">nestedArrays<\/span><span class=\"p\">.<\/span><span class=\"nf\">flat<\/span><span class=\"p\">(<\/span><span class=\"kc\">Infinity<\/span><span class=\"p\">)<\/span>\n<span class=\"nx\">scrib<\/span><span class=\"p\">.<\/span><span class=\"nf\">show<\/span><span class=\"p\">(<\/span><span class=\"nx\">oneLevelFlat<\/span><span class=\"p\">)<\/span>\n<span class=\"nx\">scrib<\/span><span class=\"p\">.<\/span><span class=\"nf\">show<\/span><span class=\"p\">(<\/span><span class=\"nx\">twoLevelFlat<\/span><span class=\"p\">)<\/span>\n<span class=\"nx\">scrib<\/span><span class=\"p\">.<\/span><span class=\"nf\">show<\/span><span class=\"p\">(<\/span><span class=\"nx\">infinityLevelFlat<\/span><span class=\"p\">)<\/span>\n\n<span class=\"c1\">\/\/ flatMap method<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">webTechnologies<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">HTML<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">CSS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">JS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">]<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">flatAndLowercase<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">webTechnologies<\/span><span class=\"p\">.<\/span><span class=\"nf\">flatMap<\/span><span class=\"p\">(<\/span><span class=\"nx\">technology<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">technology<\/span><span class=\"p\">.<\/span><span class=\"nf\">toLowerCase<\/span><span class=\"p\">())<\/span>\n<span class=\"nx\">scrib<\/span><span class=\"p\">.<\/span><span class=\"nf\">show<\/span><span class=\"p\">(<\/span><span class=\"nx\">flatAndLowercase<\/span><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>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\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<h3><span class=\"ez-toc-section\" id=\"%D8%B2%D9%86%D8%AC%DB%8C%D8%B1_%DA%A9%D8%B1%D8%AF%D9%86_%D8%B1%D9%88%D8%B4%D9%87%D8%A7\"><\/span>\n<p>  \u0632\u0646\u062c\u06cc\u0631 \u06a9\u0631\u062f\u0646 \u0631\u0648\u0634\u0647\u0627<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight javascript\"><code><span class=\"c1\">\/\/ Chaining of methods<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">technologies<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">HTML<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Frontend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">CSS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Frontend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">JS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Frontend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">React<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Frontend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Java<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Backend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n  <span class=\"p\">{<\/span>\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Node<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Backend<\/span><span class=\"dl\">\"<\/span>\n  <span class=\"p\">},<\/span>\n<span class=\"p\">]<\/span>\n\n<span class=\"c1\">\/\/ Filter and map<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">frontendNamesByChaining<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">technologies<\/span><span class=\"p\">.<\/span><span class=\"nf\">filter<\/span><span class=\"p\">(<\/span><span class=\"nx\">technology<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">technology<\/span><span class=\"p\">.<\/span><span class=\"nx\">type<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">Frontend<\/span><span class=\"dl\">\"<\/span><span class=\"p\">).<\/span><span class=\"nf\">map<\/span><span class=\"p\">(<\/span><span class=\"nx\">technology<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">technology<\/span><span class=\"p\">.<\/span><span class=\"nx\">name<\/span><span class=\"p\">)<\/span>\n<span class=\"nx\">scrib<\/span><span class=\"p\">.<\/span><span class=\"nf\">show<\/span><span class=\"p\">(<\/span><span class=\"nx\">frontendNamesByChaining<\/span><span class=\"p\">)<\/span>\n\n<span class=\"c1\">\/\/ flat and map<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">nestedArrays<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">HTML<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">CSS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">JS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">REACT<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">NEXTJS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">TAILWIND<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">SCSS<\/span><span class=\"dl\">\"<\/span><span class=\"p\">]]]]<\/span>\n<span class=\"kd\">const<\/span> <span class=\"nx\">flatAndMapChaining<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">nestedArrays<\/span><span class=\"p\">.<\/span><span class=\"nf\">flat<\/span><span class=\"p\">(<\/span><span class=\"kc\">Infinity<\/span><span class=\"p\">).<\/span><span class=\"nf\">map<\/span><span class=\"p\">(<\/span><span class=\"nx\">technology<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">technology<\/span><span class=\"p\">.<\/span><span class=\"nf\">toLowerCase<\/span><span class=\"p\">())<\/span>\n<span class=\"nx\">scrib<\/span><span class=\"p\">.<\/span><span class=\"nf\">show<\/span><span class=\"p\">(<\/span><span class=\"nx\">flatAndMapChaining<\/span><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>\u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0631\u0627 \u0648\u0627\u0631\u062f \u06a9\u0646\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>\u067e\u0631\u062f\u0627\u062e\u062a \u0627\u06cc\u0646 \u062a\u0639\u0628\u06cc\u0647 \u0634\u062f\u0647 \u0628\u0631\u0627\u06cc \u0627\u062c\u0631\u0627\u06cc \u0645\u062b\u0627\u0644 \u06a9\u062f \u0630\u06a9\u0631 \u0634\u062f\u0647 \u062f\u0631 \u0628\u0627\u0644\u0627<\/p>\n<p>\u0627\u06cc\u0646 \u0628\u0631\u0627\u06cc \u0627\u06cc\u0646 \u067e\u0633\u062a \u0627\u0633\u062a \u060c \u0628\u0647 \u0645\u0646 \u0627\u0637\u0644\u0627\u0639 \u062f\u0647\u06cc\u062f \u06a9\u0647 \u0622\u06cc\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u0645 \u062f\u0631 \u0627\u06cc\u0646 \u0645\u0642\u0627\u0644\u0647 \u067e\u06cc\u0634\u0631\u0641\u062a \u0647\u0627\u06cc\u06cc \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u0645. \u0647\u0645\u0686\u0646\u06cc\u0646 \u060c \u0648\u0628 \u0633\u0627\u06cc\u062a scribbler.live \u0631\u0627 \u0628\u0631\u0631\u0633\u06cc \u06a9\u0646\u06cc\u062f.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D8%B4%D9%85%D8%A7_%D9%85%DB%8C_%D8%AA%D9%88%D8%A7%D9%86%DB%8C%D8%AF_%D8%A8%D8%A7_%D9%85%D9%86_%D8%AA%D9%85%D8%A7%D8%B3_%D8%A8%DA%AF%DB%8C%D8%B1%DB%8C%D8%AF_%E2%80%93\"><\/span>\n<p>  \u0634\u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0628\u0627 \u0645\u0646 \u062a\u0645\u0627\u0633 \u0628\u06af\u06cc\u0631\u06cc\u062f &#8211;<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u06cc\u0646\u0633\u062a\u0627\u06af\u0631\u0627\u0645 &#8211; https:\/\/www.instagram.com\/supremacism__shubh\/<br \/>LinkedIn-https:\/\/www.linkedin.com\/in\/shubham-tiwari-b7544b193\/<br \/>\u0627\u06cc\u0645\u06cc\u0644 &#8211; shubhmtiwri00@gmail.com<\/p>\n<p>\u0634\u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0628\u0627 \u06a9\u0645\u06a9 \u0645\u0627\u0644\u06cc \u062f\u0631 \u0644\u06cc\u0646\u06a9 \u0632\u06cc\u0631 \u0628\u0647 \u0645\u0646 \u06a9\u0645\u06a9 \u06a9\u0646\u06cc\u062f \u0645\u062a\u0634\u06a9\u0631\u0645<br \/>https:\/\/www.buymeacoffee.com\/waaduheck<\/p>\n<p>\u0647\u0645\u0686\u0646\u06cc\u0646 \u0627\u06cc\u0646 \u067e\u0633\u062a \u0647\u0627 \u0631\u0627 \u0646\u06cc\u0632 \u0628\u0631\u0631\u0633\u06cc \u06a9\u0646\u06cc\u062f<\/p>\n<p><\/p><\/div>\n<p><script async src=\"\/\/www.instagram.com\/embed.js\"><\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0633\u0644\u0627\u0645 \u062f\u0648\u0633\u062a\u0627\u0646 \u062a\u0648\u0633\u0639\u0647 \u062f\u0647\u0646\u062f\u0647 \u0647\u0645\u06a9\u0627\u0631 \u0645\u0646 \u060c 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