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How to short circuit Array.forEach like calling break?

Is there a way so that I can break out of array map method after my condition is met ? I tried the following which throws "Illegal Break Statement" Error. This is some random example I came up with.

var myArray = [22,34,5,67,99,0]; var hasValueLessThanTen = false; myArray.map(function (value){ if(value<10){ hasValueLessThanTen = true; break; } } );

We can do using for loops, but I wanted to know whether we can accomplish the same using map method ?

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1 Answer

That's not possible using the built-in Array.prototype.map. However, you could use a simple for-loop instead, if you do not intend to map any values:

var hasValueLessThanTen = false; for (var i = 0; i < myArray.length; i++) { if (myArray[i] < 10) { hasValueLessThanTen = true; break; } }

Or, as suggested by @RobW, use Array.prototype.some to test if there exists at least one element that is less than 10. It will stop looping when some element that matches your function is found:

var hasValueLessThanTen = myArray.some(function (val) { return val < 10; });
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