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December 17, 2015 04:59
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See if an array/string contains something. Nothing fancy, but without a library you'll need this as array.indexOf doesn't work in IE8 and lower.
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| var contains = function (list, value) { | |
| if (list instanceof Array) { | |
| var i = list.length; | |
| while (i--) { | |
| if (list[i] === value) { | |
| return true; | |
| } | |
| } | |
| return false; | |
| } else if (typeof list === "string") { | |
| return (list.indexOf(value) !== -1); | |
| } | |
| }; |
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| <html> | |
| <head> | |
| <title>Contains tests</title> | |
| <link rel="stylesheet" type="text/css" href="http://code.jquery.com/qunit/qunit-1.11.0.css"> | |
| <script type="text/javascript" src="http://code.jquery.com/qunit/qunit-1.11.0.js"></script> | |
| <script type="text/javascript" src="./contains.js"></script> | |
| <script type="text/javascript"> | |
| test("contains - arrays", function() { | |
| strictEqual(contains([1,2,3,4], 1), true); | |
| strictEqual(contains(["chris", "nicolas", "alex"], "chris"), true); | |
| strictEqual(contains([1,2,3,4], 5), false) | |
| }); | |
| test("contains - strings", function() { | |
| strictEqual(contains("chris", "chr"), true); | |
| strictEqual(contains("chris", "christof"), false); | |
| }); | |
| </script> | |
| </head> | |
| <body> | |
| <div id="qunit"></div> | |
| </body> | |
| </html> | |
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