JavaScript: Check whether there is at least one element which occurs in two given sorted arrays of integers

JavaScript Basic: Exercise-100 with Solution

Check if Arrays Share at Least One Common Element

Write a JavaScript program to check if there is at least one element in two given sorted arrays of integers.

Visual Presentation:

Sample Solution:

JavaScript Code:

// Function to check if there's a common element in two arrays
function check_common_element(arra1, arra2) {
  for (var i = 0; i < arra1.length; i++) {
    // Check if the current element from arra1 exists in arra2
    if (arra2.indexOf(arra1[i]) != -1) {
      return true; // If found, return true
    }
  }
  return false; // If no common element is found, return false
}

// Example usage
console.log(check_common_element([1, 2, 3], [3, 4, 5])); // Should return true as 3 is a common element
console.log(check_common_element([1, 2, 3], [5, 6, 7])); // Should return false as no common elements are found   

Output:

true
false

Live Demo:

See the Pen javascript-basic-exercise-100 by w3resource (@w3resource) on CodePen.

Flowchart:

ES6 Version:

// Function to check if two arrays have any common elements
const check_common_element = (arra1, arra2) => {
  for (let i = 0; i < arra1.length; i++) {
    if (arra2.indexOf(arra1[i]) !== -1) {
      return true; // If a common element is found, return true
    }
  }
  return false; // Return false if no common elements found
}

console.log(check_common_element([1, 2, 3], [3, 4, 5])); // Example usage
console.log(check_common_element([1, 2, 3], [5, 6, 7])); // Example usage

For more Practice: Solve these Related Problems:

• Write a JavaScript program that checks if two sorted arrays of integers have at least one common element using a two-pointer approach.
• Write a JavaScript function that uses a hash set to determine if there is any overlapping element between two arrays.
• Write a JavaScript program that compares two arrays and returns true if they share at least one common value, optimizing for performance with large arrays.

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