js returns the number of true values there are in an array

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Alice
27 Apr 2018
1//returns the number of true values there are in an array
2function countTrue(arr) {
3	return arr.filter(w => w === true).length;
4}
5
6console.log(countTrue([true, false, false, true, false]));//  2
7console.log(countTrue([false, false, false, false]));//  0
8console.log(countTrue([]));//  0
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