It is uncommon that I am disenchanted by the JavaScript language not having a operate that I want. One such case was summing an array of numbers — I used to be anticipating Math.sum
or a likewise, baked in API. Concern not — summing an array of numbers is straightforward utilizing Array.prototype.scale back
!
const numbers = [1, 2, 3, 4]; const sum = numbers.scale back((a, b) => a + b, 0);
The 0
represents the beginning worth whereas with a
and b
, one represents the working complete with the opposite representing the worth to be added. You will additionally word that utilizing scale back
prevents uncomfortable side effects! I would nonetheless favor one thing like Math.sum(...numbers)
however a easy scale back
will do!
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