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JavaScript: Find the number of elements which presents in both of the given arrays

JavaScript Basic: Exercise-141 with Solution

Write a JavaScript program to find the number of elements which presents in both of the given arrays.

Pictorial Presentation:

JavaScript: Find the number of elements which presents in both of the given arrays.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Find the number of elements which presents in both of the given arrays.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function test_same_elements_both_arrays(arra1, arra2) {
  var result = 0;
  for(var i = 0; i < arra1.length; i++) {
    for(var j = 0; j < arra2.length; j++){
      if(arra1[i] === arra2[j])
      {
        result++;
      }
    }
  }
  return result;
}
console.log(test_same_elements_both_arrays([1,2,3,4], [1,2,3,4]));
console.log(test_same_elements_both_arrays([1,2,3,4], [1,2,3,5]));
console.log(test_same_elements_both_arrays([1,2,3,4], [11,22,33,44]));

Sample Output:

4
3
0

Flowchart:

Flowchart: JavaScript - Find the number of elements which presents in both of the given arrays

ES6 Version:

function test_same_elements_both_arrays(arra1, arra2) {
  let result = 0;
  for(let i = 0; i < arra1.length; i++) {
    for(let j = 0; j < arra2.length; j++){
      if(arra1[i] === arra2[j])
      {
        result++;
      }
    }
  }
  return result;
}
console.log(test_same_elements_both_arrays([1,2,3,4], [1,2,3,4]));
console.log(test_same_elements_both_arrays([1,2,3,4], [1,2,3,5]));
console.log(test_same_elements_both_arrays([1,2,3,4], [11,22,33,44]));

Live Demo:

See the Pen javascript-basic-exercise-141 by w3resource (@w3resource) on CodePen.

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Next: Simplify a given absolute path for a file in Unix-style.

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JavaScript: Tips of the Day

Classes/function constructors

class Person {
  constructor() {
    this.name = 'Owen';
  }
}

Person = class AnotherPerson {
  constructor() {
    this.name = 'Eddie';
  }
};

const member = new Person();
console.log(member.name);

We can set classes equal to other classes/function constructors. In this case, we set Person equal to AnotherPerson. The name on this constructor is Eddie, so the name property on the new Person instance member is "Eddie".

Ref: https://bit.ly/3jFRBje