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sabrinaluo/gist:440812106396219f1523

Last active August 29, 2015 14:11
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find element index in array; check whether element is in array
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gistfile1.js
var array = ["lily", "tom", "lucy"];
var ele1 = "lily";
var ele2 = "lucy";
var ele3 = "jack";
array.indexOf(ele1); // return 0
array.indexOf(ele2); // return 2
array.indexOf(ele3); //return -1; NOTE: element is not in the array if return -1
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