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

JavaScript Basic: Exercise-100 with Solution

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

Pictorial Presentation:

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

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title> Check whether there is at least one element which occurs in two given sorted arrays of integers</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function check_common_element(arra1, arra2) {
  for (var i = 0; i < arra1.length; i++)
  {
    if (arra2.indexOf(arra1[i]) != -1) 
      return true;
  }
  return false;
}
console.log(check_common_element([1,2,3], [3,4,5]));   
console.log(check_common_element([1,2,3], [5,6,7]));

Sample Output:

true
false

Flowchart:

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

ES6 Version:

function check_common_element(arra1, arra2) {
  for (let i = 0; i < arra1.length; i++)
  {
    if (arra2.includes(arra1[i])) 
      return true;
  }
  return false;
}
console.log(check_common_element([1,2,3], [3,4,5]));   
console.log(check_common_element([1,2,3], [5,6,7]));

Live Demo:

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


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Next: Write a JavaScript program to check whether a given string contains only Latin letters and no two uppercase and no two lowercase letters are in adjacent positions.

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JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04