Drop While

easycodingJavaScriptArraysFunctions~10 min

Asked at Google, Meta, Amazon

Overview

Implement dropWhile(array, predicate) that drops elements from the start while predicate returns true.

Examples

dropWhile([1,2,3,4], x => x < 3); // [3,4]

Solution

Reveal solution

function dropWhile(array, predicate) {
  let i = 0;
  while (i < array.length && predicate(array[i], i, array)) i++;
  return array.slice(i);
}

drop-while.js

Drop While

easycodingJavaScriptArrays

Overview

Implement dropWhile(array, predicate) that drops elements from the start while predicate returns true.

Examples

dropWhile([1,2,3,4], x => x < 3); // [3,4]

Solution

Reveal solution

function dropWhile(array, predicate) {
  let i = 0;
  while (i < array.length && predicate(array[i], i, array)) i++;
  return array.slice(i);
}

NameTopicDifficulty

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