Javascript-array.txt

1 Write a JavaScript function to check whether an `input` is an array or not.
2 Write a JavaScript function to clone an array.
3. Write a JavaScript function to get the first element of an array. Passing a parameter 'n' will return the first 'n' elements of the array.
  Test Data : 
  console.log(first([7, 9, 0, -2])); 
  console.log(first([],3));
  console.log(first([7, 9, 0, -2],3));
  console.log(first([7, 9, 0, -2],6));
  console.log(first([7, 9, 0, -2],-3));
  Expected Output : 
  7
  [] 
  [7, 9, 0] 
  [7, 9, 0, -2] 
  [] 
4 Write a simple JavaScript program to join all elements of the following array into a string. 
Sample array : myColor = ["Red", "Green", "White", "Black"];
Expected Output : 
"Red,Green,White,Black"
"Red,Green,White,Black"
"Red+Green+White+Black"
5 Write a JavaScript program which accept a number as input and insert dashes (-) between each two even numbers. For example if you accept 025468 the output should be 0-254-6-8
6 Write a JavaScript program to find the most frequent item of an array.
7 Write a JavaScript program which accept a string as input and swap the case of each character. For example if you input 'The Quick Brown Fox' the output should be 'tHE qUICK bROWN fOX'.
8 Write a JavaScript program which prints the elements of the following array.
  Note : Use nested for loops.
  Sample array : var a = [[1, 2, 1, 24], [8, 11, 9, 4], [7, 0, 7, 27], [7, 4, 28, 14], [3, 10, 26, 7]];
  Sample Output : 
  "row 0" 
  " 1" 
  " 2" 
  " 1"
  " 24"
  "row 1" 
9 Write a JavaScript program to remove duplicate items from an array (ignore case sensitivity)
10 Write a JavaScript program to shuffle an array
11 There are two arrays with individual values, write a JavaScript program to compute the sum of each individual index value from the given arrays. 
  Sample array : 
  array1 = [1,0,2,3,4];
  array2 = [3,5,6,7,8,13];
  Expected Output : 
  [4, 5, 8, 10, 12, 13] 
12 Write a JavaScript function to remove. 'null', '0', '""', 'false', 'undefined' and 'NaN' values from an array.
13  Write a JavaScript function to sort the following array of objects by title value. 
  Sample object :

  var library = [ 
     { author: 'Bill Gates', title: 'The Road Ahead', libraryID: 1254},
     { author: 'Steve Jobs', title: 'Walter Isaacson', libraryID: 4264},
     { author: 'Suzanne Collins', title: 'Mockingjay: The Final Book of The Hunger Games', libraryID: 3245}
     ];
14 Write a JavaScript function to remove a specific element from an array.

  Test data :
  console.log(remove_array_element([2, 5, 9, 6], 5));
  [2, 9, 6]
15 Write a JavaScript function to move an array element from one position to another. 

  Test Data :
  console.log(move([10, 20, 30, 40, 50], 0, 2));
  [20, 30, 10, 40, 50]
  console.log(move([10, 20, 30, 40, 50], -1, -2));
  [10, 20, 30, 50, 40]