{"id":25645,"date":"2022-12-11T13:21:33","date_gmt":"2022-12-11T07:51:33","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-search-string-inside-array-javascript\/"},"modified":"2022-12-11T13:21:33","modified_gmt":"2022-12-11T07:51:33","slug":"solved-search-string-inside-array-javascript","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-search-string-inside-array-javascript\/","title":{"rendered":"[Solved] Search string inside array javascript"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-38552529\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"38552529\" data-parentid=\"38552424\" data-score=\"3\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Your problem lies in the <strong>use of consecutive <code>if<\/code> statements without chaining them together<\/strong> to make a complete check.<\/p>\n<p>Doing it your way, <strong>the code actually completely disregards all the <code>if<\/code> statements, but the last one<\/strong>.<\/p>\n<p>So, if <strong><code>iledefrance.indexOf(departement) != -1<\/code><\/strong> gives <strong><code>false<\/code><\/strong>, it&#8217;will always execute the code inside <strong><code>else<\/code><\/strong>, meaning it&#8217;ll set <strong><code>region = 'undennnnnfined'<\/code><\/strong>.<\/p>\n<hr>\n<p><strong>Note:<\/strong><\/p>\n<p>In the code, I replaced <strong><code>!= -1<\/code><\/strong> with <strong><code>~<\/code><\/strong> as it makes for a somewhat more succinct code. In essence, it will convert <strong><code>-1<\/code><\/strong> to <strong><code>0<\/code><\/strong>, namely <strong><code>false<\/code><\/strong>.<\/p>\n<p>Be sure to check out <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/JavaScript\/Reference\/Operators\/Bitwise_Operators\">MDN&#8217;s documentation<\/a> for more if you are not familiar.<\/p>\n<hr>\n<p>\u2022 <strong>1<sup>st<\/sup> Option<\/strong> :<\/p>\n<p>Try chaining your <strong><code>if<\/code><\/strong> statements together in an <strong><code>if\/else if\/else<\/code><\/strong> format as follows:<\/p>\n<pre><code>function checkRegion(departement){\n    var region = '';\n\n    if(~alsace.indexOf(departement)) {\n        region = \"alsace\";\n    }\n    else if(~aquitaine.indexOf(departement)) {\n        region = \"aquitaine\";\n    }\n    else if(~auvergne.indexOf(departement)) {\n        region = \"auvergne\";\n    }\n    else if(~basseNormandie.indexOf(departement)) {\n        region = \"basse-normandie\";\n    }\n    else if(~iledefrance.indexOf(departement)) {\n        region = \"ile-de-france\";\n    }\n    else{\n        region = 'undennnnnfined';\n    }\n    return region;\n};\n<\/code><\/pre>\n<hr>\n<p>\u2022 <strong>2<sup>nd<\/sup> Option<\/strong> :<\/p>\n<p>Create two arrays:<\/p>\n<ul>\n<li>One should contain your region arrays (<strong><code>alsace<\/code><\/strong>, <strong><code>aquitaine<\/code><\/strong> etc) &amp;<\/li>\n<li>One more containing the names of your arrays as strings, so that you can return the appropriate string based on the array that was evaluated as true.<\/li>\n<\/ul>\n<p><strong>Code:<\/strong><\/p>\n<pre><code>function checkRegion(departement) {\n    var\n       regions = [alsace, aquitaine, auvergne, basseNormandie, iledefrance],\n       regionsNames = [\"alsace\", \"aquitaine\", \"auvergne\", \"basseNormandie\", \"iledefrance\"];\n\n    for (var i = 0; i &lt; regions.length; i++) {\n        if (~regions[i].indexOf(departement)) {\n            return regionsNames[i];\n        }\n    }\n    return \"undennnnnfined\"; \/\/ If the 'for' loop doesn't return anything, it's false.\n};\n<\/code><\/pre>\n<hr>\n<p><strong>Demos:<\/strong><\/p>\n<ul>\n<li>Working demo with the 1<sup>st<\/sup> solution \u2192 <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/jsfiddle.net\/9v8n9vf9\/\">here<\/a>.<\/li>\n<li>Working demo with the 2<sup>nd<\/sup> solution \u2192 <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/jsfiddle.net\/73y1crja\/\">here<\/a>.<\/li>\n<\/ul>\n<hr>\n<p><strong>Snippets:<\/strong><\/p>\n<ul>\n<li>Snippet with the 1<sup>st<\/sup> solution:<\/li>\n<\/ul>\n<div class=\"snippet\" data-lang=\"js\" data-hide=\"true\" data-console=\"true\" data-babel=\"false\">\n<div class=\"snippet-code snippet-currently-hidden\">\n<pre class=\"snippet-code-js lang-js prettyprint-override\"><code>function checkRegion(departement){\r\n    var region = '';\r\n\r\n    if(~alsace.indexOf(departement)) {\r\n        region = \"alsace\";\r\n    }\r\n    else if(~aquitaine.indexOf(departement)) {\r\n        region = \"aquitaine\";\r\n    }\r\n    else if(~auvergne.indexOf(departement)) {\r\n        region = \"auvergne\";\r\n    }\r\n    else if(~basseNormandie.indexOf(departement)) {\r\n       region = \"basse-normandie\";\r\n    }\r\n    else if(~iledefrance.indexOf(departement)) {\r\n        region = \"ile-de-france\";\r\n\t\t}\r\n    else{\r\n        region = 'undennnnnfined';\r\n    }\r\n    return region;\r\n};\r\n\r\nvar\r\n   alsace = [\"Strasbourg\", \"Colmar\"],\r\n   aquitaine = [\"Gironde\", \"Landes\", \"Dordogne\", \"Pyrenees-Atlantiques\", \"Lot-et-Garonne\"],\r\n   auvergne = [],\r\n   basseNormandie = [],\r\n   iledefrance = [];\r\n   \r\nalert(checkRegion(\"Strasbourg\"));<\/code><\/pre>\n<\/div>\n<\/div>\n<ul>\n<li>Snippet with the 2<sup>nd<\/sup> solution:<\/li>\n<\/ul>\n<div class=\"snippet\" data-lang=\"js\" data-hide=\"true\" data-console=\"true\" data-babel=\"false\">\n<div class=\"snippet-code snippet-currently-hidden\">\n<pre class=\"snippet-code-js lang-js prettyprint-override\"><code>function checkRegion(departement) {\r\n    var\r\n       regions = [alsace, aquitaine, auvergne, basseNormandie, iledefrance],\r\n       regionsNames = [\"alsace\", \"aquitaine\", \"auvergne\", \"basseNormandie\", \"iledefrance\"];\r\n\r\n    for (var i = 0; i &lt; regions.length; i++) {\r\n        if (~regions[i].indexOf(departement)) {\r\n            return regionsNames[i];\r\n        }\r\n    }\r\n    return \"undennnnnfined\"; \/\/ If the 'for' loop doesn't return anything, it's false.\r\n};\r\n\r\nvar\r\n   alsace = [\"Strasbourg\", \"Colmar\"],\r\n   aquitaine = [\"Gironde\", \"Landes\", \"Dordogne\", \"Pyrenees-Atlantiques\", \"Lot-et-Garonne\"],\r\n   auvergne = [],\r\n   basseNormandie = [],\r\n   iledefrance = [];\r\n   \r\nalert(checkRegion(\"Strasbourg\"));<\/code><\/pre>\n<\/div>\n<\/div><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">0<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Search string inside array javascript <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Your problem lies in the use of consecutive if statements without chaining them together to make a complete check. Doing it your way, the code actually completely disregards all the if statements, but the last one. So, if iledefrance.indexOf(departement) != -1 gives false, it&#8217;will always execute the code inside else, meaning it&#8217;ll set region &#8230; <a title=\"[Solved] Search string inside array javascript\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-search-string-inside-array-javascript\/\" aria-label=\"More on [Solved] Search string inside array javascript\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[361,333,388,362],"class_list":["post-25645","post","type-post","status-publish","format-standard","hentry","category-solved","tag-arrays","tag-javascript","tag-jquery","tag-string"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Search string inside array javascript - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-search-string-inside-array-javascript\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Search string inside array javascript - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Your problem lies in the use of consecutive if statements without chaining them together to make a complete check. Doing it your way, the code actually completely disregards all the if statements, but the last one. So, if iledefrance.indexOf(departement) != -1 gives false, it&#8217;will always execute the code inside else, meaning it&#8217;ll set region ... 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