JS Array Methods

• Pop- This method is used to remove the last element of the array.

Syntax

Array.pop()

let Courses = [“Php”, “java”, “c”];

alert( Courses.pop() );

alert( Courses);

• Push- This method is used to insert an element to the end of array.

Syntax

Array.push(‘element’)

let Courses = [“Php”, “java”, “c”];

Courses.push(“c++”) ;

alert( Courses);

• Shift- This method is used to remove the first element of the array.

Syntax

Array.shift()

let Courses = [“Php”, “java”, “c”];

alert( Courses.shift() );

alert( Courses);

• Unshift- This method is used to insert first element from an array.

Syntax

Array.unshift(‘element’)

let Courses = [“Php”, “java”, “c”];

Courses. unshift (“c++”) ;

alert( Courses);

• Splice- This method is used to add or remove elements from any index

Syntax

array.splice(index, howmany, item1, ….., itemX)

howmany is optional if 0 means no items is removed

let Courses = [“Php”, “java”, “c”];

var removed = Courses.splice(1,1);

alert( removed);

let Courses = [“Php”, “java”, “c”];

var removed = Courses.splice(1,0.”dotnet”);

alert( removed);

• Join- This method is used to join the elements of an array and create a string

Syntax

array.join(“” || ”,” || “-”)

         let Courses = [“Php”, “java”, “c”];

         var string = Courses.join();

         alert( string);

• Slice- This method is used to extract the portion of an aaray

Syntax

array.slice(startIndex, endIndex)

let Courses = [“Php”, “java”, “c”];

var extract = Courses.slice(1);

alert( extract);

• Concat- This method is used to merge or combine two or more arrays

Syntax

Array.concat(array2)

         let Courses = [“Php”, “java”, “c”];

         let db = [“mysql”, “oracle”, “file”];

         var result = Courses.concat(db);

         alert( result);

• Sort- This method is used to sort the elements of an array

Syntax

Array.sort()

         let Courses = [“Php”, “java”, “c”];

         Courses.sort();

         alert( Courses);