{"id":24846,"date":"2023-05-26T13:28:59","date_gmt":"2023-05-26T09:58:59","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/from-java-to-kotlin-first-impression-on-for-loops-42f8\/"},"modified":"2023-05-26T13:28:59","modified_gmt":"2023-05-26T09:58:59","slug":"from-java-to-kotlin-first-impression-on-for-loops-42f8","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/from-java-to-kotlin-first-impression-on-for-loops-42f8\/","title":{"rendered":"\u0627\u0632 \u062c\u0627\u0648\u0627 \u062a\u0627 \u06a9\u0627\u062a\u0644\u06cc\u0646\u060c \u0627\u0648\u0644\u06cc\u0646 \u0628\u0631\u062f\u0627\u0634\u062a \u062f\u0631 \u062d\u0644\u0642\u0647\u200c\u0647\u0627\u06cc for"},"content":{"rendered":"
\n

\u0686\u06cc\u061f \u0642\u0631\u0627\u0631 \u0628\u0648\u062f \u0627\u06cc\u0646 \u0645\u062b\u0644 \u062c\u0627\u0648\u0627 \u0628\u0627\u0634\u0647\u061f \u0645\u0646 \u062d\u062a\u06cc \u0646\u0645\u06cc \u062a\u0648\u0627\u0646\u0645 \u06cc\u06a9 \u062d\u0644\u0642\u0647 for \u0628\u0646\u0648\u06cc\u0633\u0645\u061f!<\/p>\n

\u06cc\u0627 \u062d\u062f\u0627\u0642\u0644 \u0627\u06cc\u0646 \u0627\u0648\u0644\u06cc\u0646 \u0628\u0631\u062f\u0627\u0634\u062a \u0645\u0646 \u0627\u0632 \u06a9\u0627\u062a\u0644\u06cc\u0646 \u0628\u0648\u062f.
\u0633\u0639\u06cc \u06a9\u0631\u062f\u0645 \u0628\u0646\u0648\u06cc\u0633\u0645 for (int i = 0...)<\/code> \u0627\u0645\u0627 \u0628\u0639\u062f \u0628\u0647 \u0633\u0631\u0639\u062a \u0628\u0627 \u0622\u0646 \u0633\u0627\u0632\u06af\u0627\u0631 \u0634\u062f\u0645 for (var i = 0...)<\/code> \u0648 \u0633\u067e\u0633 for (var i = 0 : Int....)<\/code> \u0627\u0645\u0627 \u0641\u0647\u0645\u06cc\u062f \u06a9\u0647 \u0645\u0646 \u0628\u0647 \u0647\u06cc\u0686 \u062c\u0627 \u0646\u0645\u06cc \u0631\u0648\u0645. <\/p>\n

\u0628\u0639\u062f \u0627\u0632 \u062e\u0631\u0627\u0634\u06cc\u062f\u0646 \u0646\u0648\u06a9\u0645 \u0648 \u06af\u0641\u062a\u0646 \u0686\u0646\u062f \u062a\u0627 \u0646\u0641\u0631\u06cc\u0646<\/del> \u06a9\u0644\u0645\u0627\u062a \u062e\u0648\u062f \u062f\u0644\u06af\u0631\u0645 \u06a9\u0646\u0646\u062f\u0647 \u0645\u0646 \u0628\u0647 \u062c\u0627\u06cc \u0622\u0646 \u062d\u0644\u0642\u0647 for \u0645\u0646\u0638\u0645 \u0627\u0641\u0632\u0627\u06cc\u0634 \u06cc\u0627\u0641\u062a\u0647 \u0631\u0627 \u0627\u0646\u062a\u062e\u0627\u0628 \u06a9\u0631\u062f\u0645. \u0627\u0645\u0627 \u0627\u0641\u0633\u0648\u0633 for (n : ints)<\/code> \u0647\u0645\u0686\u0646\u06cc\u0646 \u0645\u0646\u062c\u0631 \u0628\u0647 \u06cc\u06a9 \u062e\u0637\u0627\u06cc \u06a9\u0627\u0645\u067e\u0627\u06cc\u0644 \u0634\u062f. <\/p>\n

\u067e\u0633 \u0628\u06cc\u0627\u06cc\u06cc\u062f \u0628\u0647 \u0686\u06cc\u0632\u06cc \u06a9\u0647 \u0645\u0646 \u0645\u06cc \u06af\u0648\u06cc\u0645 \u0634\u06cc\u0631\u062c\u0647 \u0628\u0632\u0646\u06cc\u0645 \u0628\u0627\u06cc\u062f<\/em> \u0627\u0646\u062c\u0627\u0645 \u062f\u0627\u062f\u0647 \u0627\u0646\u062f. <\/p>\n

\u0633\u0644\u0628 \u0645\u0633\u0626\u0648\u0644\u06cc\u062a \u0633\u0631\u06cc\u0639 \u0627\u06cc\u0646 \u0627\u0633\u062a \u06a9\u0647 IntRange<\/code> \u0634\u06cc\u060c \u0648 \u0647\u0645\u0686\u0646\u06cc\u0646 \u0645\u062d\u062f\u0648\u062f\u0647 \u0647\u0627\u06cc \u062f\u06cc\u06af\u0631 \u062f\u0631 kotlin.ranges<\/code> \u0628\u0633\u062a\u0647 \u0647\u0627 \u0622\u0633\u0627\u0646 \u0647\u0633\u062a\u0646\u062f \u0648 \u0627\u063a\u0644\u0628 \u062f\u0631 \u062d\u0644\u0642\u0647 \u0647\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u0634\u0648\u0646\u062f. \u0622\u0646\u0647\u0627 \u0631\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0628\u0647 \u0631\u0627\u062d\u062a\u06cc \u0645\u0627\u0646\u0646\u062f \u0646\u0645\u0648\u0646\u0647 \u0647\u0627\u06cc \u0632\u06cc\u0631 \u0627\u06cc\u062c\u0627\u062f \u06a9\u0631\u062f:<\/p>\n

\n
val<\/span> intRange<\/span> =<\/span> (<\/span>1<\/span> ..<\/span> 5<\/span>)<\/span>\nval<\/span> theEntireEnglishAlphabet<\/span> =<\/span> (<\/span>'a'<\/span> ..<\/span> 'z'<\/span>)<\/span>\n\n\/\/ The \"..\" operator makes it an ascending range. <\/span>\n\/\/ Another option, is to use the until or downTo keywords<\/span>\n\nval<\/span> theSameAsIntRange<\/span> =<\/span> (<\/span>1<\/span> until<\/span> 5<\/span>)<\/span>\nval<\/span> descendingIntRange<\/span> =<\/span> (<\/span>5<\/span> downTo<\/span> 1<\/span>)<\/span>\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0628\u0646\u0627\u0628\u0631\u0627\u06cc\u0646\u060c \u0628\u0631\u06af\u0631\u062f\u06cc\u0645 \u0628\u0647 \u0622\u0646\u0686\u0647 \u06a9\u0647 \u0627\u06cc\u0646 \u0645\u0642\u0627\u0644\u0647 \u062f\u0631\u0628\u0627\u0631\u0647 \u0622\u0646 \u0627\u0633\u062a\u060c \u0686\u06af\u0648\u0646\u0647 \u0627\u0632 \u062d\u0644\u0642\u0647 \u0647\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u0645\u061f <\/p>\n
\u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u0686\u0646\u062f \u0646\u0645\u0648\u0646\u0647 \u0622\u0648\u0631\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a!<\/p>\n
\n
\/\/ the regular, wonderful, enhanced for-loop<\/span>\n\nval<\/span> someArr<\/span> =<\/span> intArrayOf<\/span>(<\/span>5<\/span>,<\/span> 3<\/span>,<\/span> 6<\/span>,<\/span> 32<\/span>,<\/span> 20<\/span>,<\/span> 1<\/span>)<\/span>\n\nfun<\/span> enhancedLoop<\/span>()<\/span> {<\/span>\n  for<\/span> (<\/span>num<\/span> in<\/span> someArr<\/span>)<\/span> {<\/span>\n    println<\/span>(<\/span>num<\/span>)<\/span> \/\/ -> console: 5, 3, 6, 32, 20, 1<\/span>\n  }<\/span> \n}<\/span>\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0622\u0631\u0647!  \u06cc\u06a9 \u062d\u0644\u0642\u0647!  \ud83d\ude4c \u0627\u0645\u0627 \u0686\u06af\u0648\u0646\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u0645 \u0627\u06cc\u0646\u062f\u06a9\u0633 \u0647\u0627 \u0631\u0627 \u0628\u062f\u0633\u062a \u0628\u06cc\u0627\u0648\u0631\u0645\u061f  \ud83e\udd14 
2 \u0631\u0627\u0647 \u0628\u0631\u0627\u06cc \u062f\u0633\u062a\u06cc\u0627\u0628\u06cc \u0628\u0647 \u0627\u06cc\u0646 \u0622\u0633\u0627\u0646\u06cc \u0648\u062c\u0648\u062f \u062f\u0627\u0631\u062f.  \u06cc\u06a9\u06cc \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 .indicies<\/code> \u062e\u0627\u0635\u06cc\u062a(\u061f) \u06a9\u0647 \u062f\u0631 \u0647\u0645\u0647 \u0622\u0631\u0627\u06cc\u0647 \u0647\u0627 \u0648 \u0645\u062c\u0645\u0648\u0639\u0647 \u0647\u0627 \u067e\u06cc\u062f\u0627 \u062e\u0648\u0627\u0647\u06cc\u062f \u06a9\u0631\u062f \u06a9\u0647 \u06cc\u06a9… \u062d\u062f\u0633 \u0632\u062f\u06cc\u062f! IntRange<\/code>.<\/p>\n
\n
\n\/\/ using the .indicies <\/span>\n\nval<\/span> someArr<\/span> =<\/span> intArrayOf<\/span>(<\/span>5<\/span>,<\/span> 3<\/span>,<\/span> 6<\/span>,<\/span> 32<\/span>,<\/span> 20<\/span>,<\/span> 1<\/span>)<\/span>\n\nfun<\/span> loopWithIndex<\/span>()<\/span> {<\/span>\n  for<\/span> (<\/span>i<\/span> in<\/span> someArr<\/span>.<\/span>indicies<\/span>)<\/span> {<\/span>\n    println<\/span>(<\/span>i<\/span>)<\/span> \/\/ -> 0, 1, 2, 3, 4, 5<\/span>\n  }<\/span>\n}<\/span>\n\n\/\/ and if you're looking to loop until a certain value.<\/span>\n\/\/ you can just create a new range<\/span>\n\n\/\/ top level: private const val MAX_LOOPS = 5 <\/span>\n\nfun<\/span> loopWithInlineRange<\/span>()<\/span> {<\/span>\n  for<\/span> (<\/span>i<\/span> in<\/span> 0<\/span> ..<\/span> MAX_LOOPS<\/span>)<\/span> {<\/span> \/\/ you can also use the \"until\" keyword for increased readability <\/span>\n    println<\/span>(<\/span>i<\/span>)<\/span> \/\/ -> 0, 1, 2, 3, 4, 5<\/span>\n  }<\/span>\n}<\/span>\n\n\/\/ and if you'd like to do it descending, most likely just <\/span>\n\/\/ a \"backwards loop\" <\/span>\n\nval<\/span> someOtherArr<\/span> =<\/span> intArrayOf<\/span>(<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 10<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>)<\/span>\n\nfun<\/span> loopDescendingWithRange<\/span>(){<\/span>\n  for<\/span> (<\/span>i<\/span> in<\/span> someOtherArr<\/span>.<\/span>size<\/span> -<\/span>1<\/span> downTo<\/span> 0<\/span>){<\/span>\n    println<\/span>(<\/span>someOtherArr<\/span>[<\/span>i<\/span>])<\/span> \/\/ -> 5, 4, 10 2, 1<\/span>\n  }<\/span>\n}<\/span>\n\n<\/code><\/pre>\n
\n
\n    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n
    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    \n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n
\u0627\u0645\u06cc\u062f\u0648\u0627\u0631\u0645 \u0627\u06cc\u0646 \u0645\u0637\u0627\u0644\u0639\u0647 \u06a9\u0648\u0686\u06a9 \u0628\u0631\u0627\u06cc \u0634\u0645\u0627 \u0645\u0641\u06cc\u062f \u0628\u0648\u062f\u0647 \u0628\u0627\u0634\u062f.  \u062f\u0644\u0645 \u0628\u0631\u0627\u06cc \u062e\u0648\u0628\u0645 \u062a\u0646\u06af \u0634\u062f\u0647 \u0628\u0648\u062f for (int i = 0; i < whatHaveYou.length(); i++)<\/code> \u062f\u0631 \u0627\u0628\u062a\u062f\u0627\u060c \u0627\u0645\u0627 \u0628\u0647 \u0633\u0631\u0639\u062a \u0628\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0645\u062d\u062f\u0648\u062f\u0647 \u0647\u0627 \u0639\u0644\u0627\u0642\u0647 \u0645\u0646\u062f \u0634\u062f. <\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"
\u0686\u06cc\u061f \u0642\u0631\u0627\u0631 \u0628\u0648\u062f \u0627\u06cc\u0646 \u0645\u062b\u0644 \u062c\u0627\u0648\u0627 \u0628\u0627\u0634\u0647\u061f \u0645\u0646 \u062d\u062a\u06cc \u0646\u0645\u06cc \u062a\u0648\u0627\u0646\u0645 \u06cc\u06a9 \u062d\u0644\u0642\u0647 for \u0628\u0646\u0648\u06cc\u0633\u0645\u061f! \u06cc\u0627 \u062d\u062f\u0627\u0642\u0644 \u0627\u06cc\u0646 \u0627\u0648\u0644\u06cc\u0646 \u0628\u0631\u062f\u0627\u0634\u062a \u0645\u0646 \u0627\u0632 \u06a9\u0627\u062a\u0644\u06cc\u0646 \u0628\u0648\u062f. \u0633\u0639\u06cc \u06a9\u0631\u062f\u0645 \u0628\u0646\u0648\u06cc\u0633\u0645 for (int i = 0…) \u0627\u0645\u0627 \u0628\u0639\u062f \u0628\u0647 \u0633\u0631\u0639\u062a \u0628\u0627 \u0622\u0646 \u0633\u0627\u0632\u06af\u0627\u0631 \u0634\u062f\u0645 for (var i = 0…) \u0648 \u0633\u067e\u0633 for (var i = 0 : Int….) \u0627\u0645\u0627 …<\/p>\n","protected":false},"author":2,"featured_media":24847,"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-24846","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\/24846","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=24846"}],"version-history":[{"count":0,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/24846\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media\/24847"}],"wp:attachment":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media?parent=24846"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/categories?post=24846"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/tags?post=24846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}