JavaScript Array (Splice, Slice, Concat, forEach, Filter)

 Array (Splice, Slice, Concat, forEach, Filter) in JavaScript

Splice

adds and/or removes array elements.

overwrites the original array.


An array containing the deleted elements.


Slice

selects from a given start, up to a (not inclusive) given end.

does not change the original array.


returns selected elements in an array, as a new array.

Concat

concatenates (joins) two or more arrays.

does not change the existing arrays.

returns a new array, containing the joined arrays.


forEach

calls a function for each element in an array.

not executed for empty elements.


returns undefined

Filter

creates a new array filled with elements that pass a test provided by a function.

does not execute the function for empty elements.

does not change the original array.


returns  array containing the elements that pass the test.

If no elements pass the test it returns an empty array.


Comments

Post a Comment

Popular posts from this blog

JavaScript Data Types ( String, Number, BigInt, Boolean, Undefine, Null, Object, Symbol)

Image
  Data Types (String, Number, Boolean, Array, Objects) in JavaScript String It represents textual data. Number It represents integer or a floating-point number BigInt An integer with arbitrary precision. Boolean Any of two values: true or false undefined A datatype whose variable is not initialized null Denotes a null value Symbol Datatype  whose instances are unique and immutable Object Key- value pairs of collection of data
Read more

10 Best Google Chrome Extensions of 2022

Image
  10 Best Google Chrome Extensions of 2022 Google Chrome extensions are programs which will be installed into Chrome so as to vary the browser's functionality. This includes adding new features to Chrome or modifying the present behaviour of the program itself to create it more convenient for the user.  In our day to day life we use browsers to search every small thing or big thing. Millions of people are using browsers each and every day or seconds. There are so many browsers people are using, but other than Google Chrome, no other browser has so many extensions available. This has become an advantage of many users to use extensions and make their life easy. We can use extensions in android also, due to lots of options available in chrome, users are getting complexed to know which extensions are best for them. We know Chrome hogs our space and ram, when we install so many extensions, it will make our browser work slowly. To get the best extensions I have taken some good exten...
Read more

Amazing things about information technology

  Amazing things about information technology Technology has put spectacular tools and resources in our hands to make our lives ever convenient. New findings within the technical field are so frequent that it's become hard for several to catch up with the pace of inventions Technology, ever-changing and ever-growing, brings us the future we’ve always imagined. Did you recognize that you simply could earn money for locating bugs with Facebook? Do you know the actual meaning of “Android”? Or what proportion of the world’s currency is digital? 1. QWERTY keyboard was designed to slow down the typing speed People enjoy telling their writing speed on typewriter, or keyboard. It's even a competitive advantage for a few jobs to own faster and more accurate typing skills. But does one know the present layout of the QWERTY keyboards is that the outcome of an answer designed to prevent the typing speed? The initial versions of typewriters made within the 1870s had few technical issues. Th...
Read more