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accumulate javascript Code Snippet in 2022

matharrayintermediate

Last Updated: 26 November 2022

Creates an array of partial sums.

  • Use Array.prototype.reduce(), initialized with an empty array accumulator to iterate over nums.
  • Use Array.prototype.slice(-1), the spread operator (...) and the unary + operator to add each value to the accumulator array containing the previous sums.
const accumulate = (...nums) => nums.reduce((acc, n) => [...acc, n + +acc.slice(-1)], []);
accumulate(1, 2, 3, 4); // [1, 3, 6, 10] accumulate(...[1, 2, 3, 4]); // [1, 3, 6, 10]

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