javascript array of cumulative sum

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Valeria
02 Jan 2019
1const accumulate = arr => arr.map((sum => value => sum += value)(0));
2
3// Example
4accumulate([1, 2, 3, 4]);   // [1, 3, 6, 10]
5// 1             = 1
6// 1 + 2         = 3
7// 1 + 2 + 3     = 6
8// 1 + 2 + 3 + 4 = 10
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