How to implement my own reduce function
Daisho Komiyama edited this page Mar 5, 2020
·
2 revisions
Reduce as the most versatile function in programming language.
const multiplyBy2 = x => x * 2;
const add3 = x => x + 3;
const divideBy5 = x => x / 5;
const reduce = (array, howToCombine, accum) => {
for (let i = 0; i < array.length; i++) {
accum = howToCombine(accum, array[i]);
}
return accum;
};
const runFunctionOnInput = (input, fn) => {
return fn(input);
};
const output = reduce([multiplyBy2, add3, divideBy5], runFunctionOnInput, 11);