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antoine-pous/String.prototype.startWith.js

Created December 20, 2016 12:09
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Detect if string start with needle
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String.prototype.startWith.js
if(!String.prototype.startWith) {
String.prototype.startWith = function(needle) {
return this.substr(0, needle.length) === needle;
}
}
// Usage
'Hello world!'.startWith('hello'); // false
'Hello world!'.startWith('Hello'); // true
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