Shwetank Singh

Arrays Methods - Javascript

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Shwetank Singh
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What are Arrays in JS?

Arrays are special type of objects which uses numbers or index to access elements inside it.

In this example typeof array gives us object.

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In javascript arrays can contain different data types in the same container for example This array contains values of type integer, string and boolean in the same container.

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Array Methods

Push and Pop

Push - To push element in the array

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Pop - To pop element from the array

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Shift - Removes the first element unlike Pop which removes the last element.

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Unshift - Adds an element in the front of array.

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Modifying Existing Element

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Concatenating two elements

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Splicing - used to add new element(s) in the array

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In the first example we did arr.splice(1,0,'Ram') here

  • 1 - is the position where you want to start adding elements.
  • 0 - number of elements you want to remove.
  • 'Ram' - value you want to add

Slicing - used to slice elements from the array without changing the original array

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In the first example it simply sliced element present at index 1

In the second example it sliced element starting from 0 to 1 Text point to be noted 2 was exclusive it wasn't included because it the event of 2 parameters it'll start from starting position and end at (2nd argument - 1)th position.

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