Array Methods in JavaScript
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First, let's understand what an array is before exploring more about array methods.
What is Array?
An Array object in JavaScript is used to store a collection of multiple items under a single variable name. We can fetch any array element with the help of array indices.
Example of an array in JavaScript:
let arr = [1, "Apple", "Banana", true];
Array Methods
length: This method is used to get the length of an array i.e. how many elements are present in an array.push(): This method is used to insert one or more elements in an array. The elements are added at the end of an array.pop(): This method is used to remove an element from an element. The element is removed from the last.slice(): This method is used to get a portion of the array according to the value of the index provided in the method. The ending index given in the method is not included.splice(): This method is used to remove or replace an existing element of the array and/or add a new element in its place.concat(): This method is used to merge or add two or more arrays. It returns a new array after merging.fill(): This method is used to change all the elements in the array to a static value, from a start index to an end index and returns the modified array.includes(): This method is used to determine whether a certain value is present in an array or not.indexOf(): This method is used to get the first index at which a particular element is present in an array.isArray(): This method is used to check whether the provided value is an array or not.join(): This method is used to concatenate all elements of an array. It creates and returns a new string.keys(): This method is used to create an iterator object that contains only the keys of the array.lastIndexOf(): This method is used to get the last index at which the given element can be found.map(): This method is used to call the specified function for every array element and return the new array.reverse(): This method is used to reverse the elements of the given array.shift(): This method is used to remove the first element of an array and returns the removed element.unshift(): This method is used to add one or more elements at the beginning of the array and it returns the new array length.sort(): This method is used to sort the elements of an array. The default sort order is ascending.split(): This method is used to convert a string to an array.
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