Hey Guys, in this blog we are
going to learn about JavaScript Array like what is Array, How to create Array,
Methods of array with example, etc....
Let's get started...
In this part we are covering below list of topics from array.
- PUSH(),
- POP(),
- SHIFT(),
- UNSHIFT(),
- SLICE(),
- ISARRAY(),
- SKIP VALUE
What
is the Array
- In simple word we can say array is collection of items.
- In JavaScript A Pair of square brackets is represent
as a Array. like []
- we can specify different element in array by comma separate. like
[a b, c, d, ..., z]
Array looks like below:
const arrayDeclare = [100,
'd', 45, 67]
How to create Array
-In Java Script we can create array using different way like spread operators,
Array.of(), Array.from(), etc..
-Here we are going to look into straight-forward way of creating array.
we can also use Array constructor to create array like below
Now let's start Experiments in Array :)
How
to access element from array?
- suppose if you wish to access element from array then it's very simple.
Let's take above example array
const listOfItems = [ 'test', 'demo', 'parts', 'nothing',
'everything' ];
- I want to access `test` then simply i need to use
this way: listOfItems[0]
- Similar others like below
- In Array indexing start
with 0. it's very important point.
How
to add new element in Array ?? :(
- In Array we have some in-build methods so
for adding new element in array we have push() method in
array
- push(): this method is mainly used for adding new element in
existing array.
For Example
O/P:
How
to add new element in the beginning of the Array??
- in Array we have unshift() method.
this method is used for adding element in the beginning of the array.
For Example
O/P:
How
to remove element from array ?
- In Array we have POP() method
for remove element from array. It's remove element from the end of the
array.
For Example
O/P:
How
to remove element in the beginning of the Array??
- In Array we have shift() method
for remove element from array. It's remove element from the beginning
of the array.
For Example
O/P:
How
to check value is Array or not??
- in Array we have isArray() method that
we are using for checking value is array or not.
For Example:
How
can i skip value in Array ??
- While doing destructuring
of the array we can skip value. like below
For Example
How
to copy and close the Array ??
- In Array we have slice() method that we are using for copy of
existing array.
- Slice() method is not going to change in existing array it's
create new array like below
For Example
If you guys have any query then you can drop a mail
to us on this mail id:
techoswag@gmail.com
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