Most Common Array Methods JavaScript in 2023

Let’s talk about JavaScript Array. If you are looking for a job or learning JavaScript these methods might be very helpful during coding interviews. Here you can find how to prepare for a coding interview in one week.

PUSH Method use in JavaScript Array
The push() method adds new elements to the end of the array, and returns the new length.

const = arr = ["I" , "Am"];
arr.push("Developer");

// Output: ['I', 'Am', 'Developer' ]

SLICE Method use in JavaScript Array
The slice() method selects a part of an array, and return the new array.

const arr = ["I" , "Am" , "Developer"];
arr.slice(1, 2);
//Output: ['Am']

TOSTRING Method use in JavaScript Array
The toString() method converts an array to a string, and returns the result.

const arr = ["I" , "Am" , "Developer"];
arr.toString();

//Output: "I , Am , Developer"

SHIFT Method use in JavaScript Array.
The shift() method removes the first element of an array, and return that element.

const arr = ["I" , "Am" , "Developer"];
arr.shift();

//Output: [ 'Am', 'Developer' ]

MAP Method use in JavaScript Array.
The map() method creates a new array with the results of coding a function for every array element.

const arr = [1,4,9,16];
arr.map(x => x * 2 );

// OutPut: [ 2, 8, 18, 32 ]

POP Method use in JavaScript.
The pop() method removes the last element of an array, and returns that element.

const arr = ["I" , "Am" , "Developer"];
arr.pop();

//Output: ['I' , 'am']

FILTER Method use in JavaScript.
The filter() method creates an array filled with all array elements that pass a test (Provided as a function)

const arr_filter = ["I" , "Am" , "Developer"];

 var filter = arr_filter.filter(word => word.length > 3);
// Output: ["Am" , "Developer"] 

INCLUDES Method use in JavaScript.
The includes() method determines whether an array contains a specific element.

const arr = ["I" , "Am" , "Developer"];
arr.includes("Am");
// Output: true

I would also recommend my article about "Most Commonly Used JavaScript Methods in 2023" and my list of great programming and coding books.

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