Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Name some of the string methods in javascript?
The String object lets you work with a series of characters; it wraps Javascript's string primitive data type with a number of helper methods. As JavaScript automatically converts between string primitives and String objects, you can call any of the helper methods of the String object on a string primitive.
Following are some of the methods available for strings in JavaScript −
concat() −Combines the text of two strings and returns a new string.
indexOf() −Returns the index within the calling String object of the first occurrence of the specified value, or -1 if not found.
lastIndexOf() −Returns the index within the calling String object of the last occurrence of the specified value, or -1 if not found.
match() −Used to match a regular expression against a string.
replace() −Used to find a match between a regular expression and a string, and to replace the matched substring with a new substring.
search() −Executes the search for a match between a regular expression and a specified string.
slice() −Extracts a section of a string and returns a new string.
split() −Splits a String object into an array of strings by separating the string into substrings.
substr() −Returns the characters in a string beginning at the specified location through the specified number of characters.
substring() −Returns the characters in a string between two indexes into the string.
toLowerCase() −Returns the calling string value converted to lower case.
toUpperCase() −Returns the calling string value converted to uppercase.
valueOf() −Returns the primitive value of the specified object.
Usage of some of these methods
let a = "Hello World!";
console.log(a.concat(" test"))
console.log(a.indexOf("l"))
console.log(a.lastIndexOf("l"))
console.log(a.replace("Hello", "Hi"))
console.log(a.substr(3, 7))
console.log(a.toUpperCase())Output
Hello World! test 2 9 Hi World! lo Worl HELLO WORLD!
124 Views
