top of page

The finest strategy for Array methods in Javascript

Array has its strategic methods just like any other communication language to do the job. A sentence could become more powerful with a couple of phrases or quotes in between them. Similarly, an array has some major techniques to do its task more efficiently. We shall learn all about the tools of array methods for a better understanding of JS.

Image credits - Metirocracy

How to Convert Arrays to Strings in JS?

The arrays can be changed into strings when you need them to improvise the string. You can also join them via any value and it gives the desired outflow. toString( ) alters the array to a strand of values with commas in the middle of them.

Ex: const games["sliding", "swinging", "skipping", " skating"]; document.getElementById("demo").innerHTML = games.toString();.

This will offer the elements inside toys as comma-loosened strings such as 'sliding, swinging, skipping, skating'.

You can even try joining them using join( ) instead toString( ). Provides the same answer no matter the syntax.

Ex: document.getElementById("demo").innerHTML = games.join(", ");.
Hence lends the same output as the above one. 

The crucial practice of Popping and pushing in array methods.

It happens to be yet another way of adding and subtracting the array elements. Popping pops the existing elements out of it and also gives it back. Pushing just pushes the components inside arrays to enhance them further.

Not only does the popping array method eliminate the aspects but it also returns them out.

Ex: syntax is pop( ) and const games["sliding", "swinging", "skipping", " skating"]; games.pop( );.
This releases the final value and withdraws the value as skating as a result.

The pushing array method adds a new element at the end of each array.

Ex: syntax is a push( ) and games.push("athletics"); 
now this adds the new element producing the output of 'sliding, swinging, skipping, skating, athletics.

How to Shift and Unshift Elements?

  • The purpose of shifting and shifting elements can be useful when it comes to the removal or addition of any array of elements.

  • It also reduces any gaps and just shifts the other components to the left side.

  • For instance, if we have the const numbers = ["one", "two", "three", "four"]; numbers.shift( );

  • Hence the shift( ) method retrieves the leftmost first item 'one' and then gives the output of 'two, three, four'.

  • Let's see the unshifting of an array of aspects now as it adds the new one in the initial position.

  • It doesn't shift any previous things inside too.

Ex: const points = ["one", "two", "three", "four"]; points.unshift("zero");
Also it provides the current array length.
  • Answer: it says the recent length as 5 and 'Zero, one, two, three, four'.

  • One important characteristic to note here and it happens to be the delete method. The delete method involved in JS deletes the element using bracket indexing and puts holes inside. Always best to use pop or shift techniques.

How to Merge Arrays?

You can always merge any number of arrays without altering its course. This makes it go on to produce a brand-new array for us. Merging arrays comes with a concat( ) method. Just look at it step by step as follows.

  • We can concatenate two arrays at first.

Ex: const student1 = ["Saral"]; const student2 = ["Koral"]; const pupils = student1.concat(student2);.
It then offers the result of 'Saral, Koral'.
  • We shall go to the merging of three arrays next.

Ex: const student1 = ["Saral"]; const student2 = ["Koral"]; const student3 = ["Soman"]; const pupils = student1.concat(student2, student3);
  • You can also join an array with strings or values using arguments.

Ex: const array1 = ["Saral", "Soman"] const pupils = array1.concat("Abbel");.
It still evokes the output of 'Saral, Soman, Abbel' and connects the string value to the array.

How to Splice and Slice Arrays?

Splicing arrays

  • Splice mode counts up more fresh array commodities via splice( ).

Ex: const trainees = ["Abe", "Beb", "Ceb"]; trainees.splice(2, 0, "Dek", "Eeb");.

You see here the first parameter tells the position of adding and 0 tells the removal of any entities inside.

Splice also puts in the remaining two pieces in the particular array.
  • Not only that but it also delivers the deleted things to us.

For example if the const trainees = ["Abe", "Beb", "Ceb"]; const trainees. splice(2, 1, "Dek", "Eeb");.

The output will convey the earlier array as 'Abe, Beb, Ceb' and the present array as 'Abe, Beb, Dek, Eeb' 

and the Deleted item as Ceb.
  • It's often fair to take out the elements in an array without creating much fuss or friction via the splice( ) process.

Slicing arrays

  • Slicing fruits or vegetables will cut up a certain part of those. Similarly, the slice method will cut the array from a specific portion and put it back with us. It can also slash from the start point to some other point but not till the end. You know that if you have done some video editing and it does just like that slice( ) procedure.

Ex: const trainees = ["Abe", "Beb", "Ceb"]; const bc = trainees. slice(1); and there you get the newly formed array of 'Beb, Ceb'.

It doesn't remove any elements from the original array too.
  • Another sample with two parameters in the slice-like slice(1, 2); that peels off the array from element one is Beb in this case. It also shreds till the second element. It makes the output 'Beb' because it omits the end element 'Ceb'.

  • If it omits that then use the slice method to bring out the rest such as slice(2); slices and bring out the second element also. Output: 'Ceb'.

Benefits of 'to string' scenario

  • All JS objects have a to-string option and it can be utilized to have an array name as a comma-separated strand.

  • It automatically modifies the array to a series whenever the primal value should reach.

  • The same goes for an array output as you can very well see that the output comes about as a line with a comma in between them.


We saw the tasks of array methods in Javascript so far. We can now see the uses of learning the array methods, codes, or any computer languages. It surely impacts your career a long way and that's how you outstand your peers and other candidates. Learn a course, do an internship, develop your talents, and be a skilled personality.

We have just the perfect thing for you to excel yourself in the IT ocean of opportunities. We have this training program called full stack web development course. We start from the basics so that you can start even if you don't have a clue about it. Yes, you heard it right.

For students or professionals with good knowledge, we have this amazing internship program. Not only it provides you with all the work experience you need but it also offers a successful project. We let you make it with your own hands and showcase it to the world. Just have a word with us through WhatsApp, Gmail, or call straight away. See you there.


What are array methods?

Array methods perform a specific operation like an alteration or calculation. It has also been already built in so that we don't have to make it from scratch. You can apply it to merge, change, add, remove, or perform any other job.

What are the three methods of arrays that all developers must know of?

  1. Join();

  2. Split();

  3. Sort();

What is the most simple array method in JS?

  • Concat() happens to be the straightforward method out of most arrays in Javascript.

  • It has been useful to merge, concatenate and join two or more arrays to form a fresh list of arrays.

Click and view the entire video for the crisp interpretation of array methods-


bottom of page