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samueleaton/isArray.js

Last active February 6, 2016 20:58
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isArray.js
// es5
function isArray(obj) {
if(typeof obj === 'object' && ((Array.isArray && Array.isArray(obj)) ||
obj.constructor === Array ||
obj instanceof Array)) {
return true;
}
return false;
}
// es2015
const isArray = obj => typeof obj === 'object' && ((Array.isArray && Array.isArray(obj)) || obj.constructor === Array || obj instanceof Array);
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samueleaton commented Dec 9, 2015 

isArray(1); // false
isArray('array'); // false
isArray({}); // false
isArray([]); // true

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