JavaScript: Iterate over a callback n times
JavaScript fundamental (ES6 Syntax): Exercise-127 with Solution
Write a JavaScript program to iterate over a callback n times.
- Use Function.prototype.call() to call fn n times or until it returns false.
- Omit the last argument, context, to use an undefined object (or the global object in non-strict mode).
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const times = (n, fn, context = undefined) => {
let i = 0;
while (fn.call(context, i) !== false && ++i < n) {}
};
var output = '';
times(5, i => (output += i));
console.log(output); // 01234
Sample Output:
01234
Flowchart:

Live Demo:
See the Pen javascript-basic-exercise-127-1 by w3resource (@w3resource) on CodePen.
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JavaScript: Tips of the Day
Chunks an array into n smaller arrays
Example:
const tips_chunkIntoN = (arr, n) => { const size = Math.ceil(arr.length / n); return Array.from({ length: n }, (v, i) => arr.slice(i * size, i * size + size) ); } console.log(tips_chunkIntoN([1, 2, 3, 4, 5, 6, 7,8], 4));
Output:
[[1,2],[3,4],[5,6],[7,8]]
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