Java script array methods

Java script array methods

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  JavaScript Array Methods Prof.Neeraj Bhargava Kapil Chauhan Department of Computer Science School of Engineering & Systems Sciences MDS University, Ajmer
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  JavaScript Array Methods Popping  The pop() method removes the last element from an array:  var fruits = ["Banana", "Orange", "Apple", "Mango"]; fruits.pop();  Output: Banana,Orange,Apple,Mango  Banana,Orange,Apple
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  Pushing  The push()method adds a new element to an array (at the end):  Example  var fruits = ["Banana", "Orange", "Apple", "Mango"]; fruits.push("Kiwi");  Output:Banana,Orange,Apple,Mango,Kiwi
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  Shifting Elements  Shiftingis equivalent to popping, working on the first element instead of the last.  The shift() method removes the first array element and "shifts" all other elements to a lower index.  Example  var fruits = ["Banana", "Orange", "Apple", "Mango"]; fruits.shift();  Output: Banana,Orange,Apple,Mango  Orange,Apple,Mango
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  Splicing an Array The splice() method can be used to add new items to an array:  Example  var fruits = ["Banana", "Orange", "Apple", "Mango"]; fruits.splice(2, 0, "Lemon", "Kiwi");  The first parameter (2) defines the position where new elements should be added (spliced in).  The second parameter (0) defines how many elements should be removed.  The rest of the parameters ("Lemon" , "Kiwi") define the new elements to be added.  Output:Original Array: Banana,Orange,Apple,Mango  New Array: Banana,Orange,Lemon,Kiwi,Apple,Mango
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  Merging (Concatenating) Arrays The concat() method creates a new array by merging (concatenating) existing arrays:  Example (Merging Two Arrays)  var myGirls = ["Cecilie", "Lone"]; var myBoys = ["Emil", "Tobias", "Linus"]; var myChildren = myGirls.concat(myBoys);  Output : Cecilie,Lone,Emil,Tobias,Linus
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  Merging Three Arrays var arr1 = ["Cecilie", "Lone"]; var arr2 = ["Emil", "Tobias", "Linus"]; var arr3 = ["Robin", "Morgan"]; var myChildren = arr1.concat(arr2, arr3);  Output: Cecilie,Lone,Emil,Tobias,Linus,Robin,Morgan
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  Slicing an Array The slice() method slices out a piece of an array into a new array.  This example slices out a part of an array starting from array element 1 ("Orange"):  Example  var fruits = ["Banana", "Orange", "Lemon", "Apple", "Mango"]; var citrus = fruits.slice(1);  Output: Banana,Orange,Lemon,Apple,Mango Orange,Lemon,Apple,Mango
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  Assignment Question  ExplainJavaScript Array Methods with suitable example.