JavaScript: Apply a function against an accumulator and each element in the array (from left to right), returning an array of successively reduced values
JavaScript: Exercise-156 with Solution
Write a JavaScript program to apply a function against an accumulator and each element in the array (from left to right), returning an array of successively reduced values.
- Use Array.prototype.reduce() to apply the given function to the given array, storing each new result.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const reduceSuccessive = (arr, fn, acc) =>
arr.reduce((res, val, i, arr) => (res.push(fn(res.slice(-1)[0], val, i, arr)), res), [acc]);
console.log(reduceSuccessive([1, 2, 3, 4, 5, 6], (acc, val) => acc + val, 0));
Sample Output:
[0,1,3,6,10,15,21]
Flowchart:
Live Demo:
See the Pen javascript-basic-exercise-156-1 by w3resource (@w3resource) on CodePen.
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