Created
May 17, 2016 18:58
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JS Bin // source http://jsbin.com/puqago
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <script id="jsbin-javascript"> | |
| //indexOf | |
| var x = [2,5,6,6]; | |
| //second parameter is the from index (inclusive) | |
| x.indexOf(6,-1);//3 | |
| //-1 can be used to grab the last item in an array | |
| var indices = []; | |
| var array = ['a','b','a','c','a','d']; | |
| var element = 'a'; | |
| var idx = array.indexOf(element);//0 | |
| while (idx != -1) {//while there is an element returned | |
| //we grab the first occurence if it exists | |
| //then push the returned element's index into a cache array | |
| indices.push(idx); | |
| //we then increment by telling indexOf to search starting from | |
| //the next index | |
| idx = array.indexOf(element,idx+1); | |
| //this function will keep running until all element indicies are found | |
| } | |
| console.log(indices);//[0,2,4]; | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript">//indexOf | |
| var x = [2,5,6,6]; | |
| //second parameter is the from index (inclusive) | |
| x.indexOf(6,-1);//3 | |
| //-1 can be used to grab the last item in an array | |
| var indices = []; | |
| var array = ['a','b','a','c','a','d']; | |
| var element = 'a'; | |
| var idx = array.indexOf(element);//0 | |
| while (idx != -1) {//while there is an element returned | |
| //we grab the first occurence if it exists | |
| //then push the returned element's index into a cache array | |
| indices.push(idx); | |
| //we then increment by telling indexOf to search starting from | |
| //the next index | |
| idx = array.indexOf(element,idx+1); | |
| //this function will keep running until all element indicies are found | |
| } | |
| console.log(indices);//[0,2,4]; | |
| </script></body> | |
| </html> |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| //indexOf | |
| var x = [2,5,6,6]; | |
| //second parameter is the from index (inclusive) | |
| x.indexOf(6,-1);//3 | |
| //-1 can be used to grab the last item in an array | |
| var indices = []; | |
| var array = ['a','b','a','c','a','d']; | |
| var element = 'a'; | |
| var idx = array.indexOf(element);//0 | |
| while (idx != -1) {//while there is an element returned | |
| //we grab the first occurence if it exists | |
| //then push the returned element's index into a cache array | |
| indices.push(idx); | |
| //we then increment by telling indexOf to search starting from | |
| //the next index | |
| idx = array.indexOf(element,idx+1); | |
| //this function will keep running until all element indicies are found | |
| } | |
| console.log(indices);//[0,2,4]; |
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