JavaScript: Get an array of elements that appear in both arrays

JavaScript fundamental (ES6 Syntax): Exercise-144 with Solution

Intersection of Two Arrays

Write a JavaScript program to get an array of elements that appear in both arrays.

• Use Array.prototype.includes() to determine values that are not part of values.
• Use Array.prototype.filter() to remove them.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 

// Define the function to find similarity between two arrays
const similarity = (arr, values) =>
  // Filter elements from the first array that are also present in the second array
  arr.filter(v => values.includes(v));

// Test the function with examples
console.log(similarity([1, 2, 3], [1, 2, 4])); // Output: [1, 2]

Output:

[1,2]

Visual Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-144-1 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that returns an array of elements found in both of two given arrays.
• Write a JavaScript function that computes the intersection of two arrays using Set operations.
• Write a JavaScript program that iterates through two arrays and collects common values, handling duplicates appropriately.

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