JavaScript: Remove elements from an array for which the given function returns false

JavaScript fundamental (ES6 Syntax): Exercise-227 with Solution

Write a JavaScript program to remove elements from an array for which the given function returns false.

• Use Array.prototype.filter() to find array elements that return truthy values.
• Use Array.prototype.reduce() to remove elements using Array.prototype.splice().
• The callback function is invoked with three arguments (value, index, array).

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const remove = (arr, func) =>
  Array.isArray(arr)
    ? arr.filter(func).reduce((acc, val) => {
        arr.splice(arr.indexOf(val), 1);
        return acc.concat(val);
      }, [])
    : [];

console.log(remove([1, 2, 3, 4], n => n % 2 === 0));

Sample Output:

[2,4]

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-227-1 by w3resource (@w3resource) on CodePen.

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