How can I efficiently remove elements from an array that exist in another array in JavaScript?

Efficiently Removing Array Elements Matching Another Array

In JavaScript, the requirement may arise to eliminate elements from one array that exist within another array. This can be achieved efficiently without resorting to loops and splicing.

jQuery Approach

Using jQuery, one can utilize the grep() and inArray() functions:

myArray = $.grep(myArray, function(value) {
    return $.inArray(value, toRemove) < 0;
});

Pure JavaScript Solution

For a pure JavaScript implementation, Array.filter() serves as an effective method:

myArray = myArray.filter( function(el) {
    return toRemove.indexOf(el) < 0;
});

Alternative Using Array.includes()

As browser support for Array.includes() has grown, it offers a concise alternative:

myArray = myArray.filter( function(el) {
    return !toRemove.includes(el);
});

Modern Approach with Arrow Functions

Employing arrow functions further streamlines the code:

myArray = myArray.filter((el) => !toRemove.includes(el));

These pure JavaScript approaches provide efficient ways to remove elements matching another array without the overhead of loops and splicing.

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