Snigdha Paul

Snigdha Paul January 4, 2025 No Comments

How to check a pattern without case sensitivity only for one portion in a string?

We will add (?i) for matching a specific portion of a string in case insensitive way. Let’s see an example –We have one string below…

Snigdha Paul December 28, 2024 No Comments

What is the use of $1, $2, … etc in regex?

$1, $2 refers the capturing groups. $1 means first capturing group$2 means first capturing group…. etc.These are mainly used for replacement. Lets see an exampleWe…

Snigdha Paul December 21, 2024 No Comments

What is the difference between (?=) and (?<=) in regex?

(?=) is used to check if a string (which we want to match) is followed by another string or not.(?<=) is used to check if…

Snigdha Paul December 14, 2024 No Comments

How to match a pattern which must be preceded by a specific string?

Lets see with an example : We want to search a string “final” which must be preceded by “semi“. Here is two strings below:finalsemifinal Regex…

Snigdha Paul December 7, 2024 No Comments

Why we use (?<!…) instead of (?!…) while matching a pattern which should not be preceded by a specific pattern?

Lets see through example. We have two strings below ,Out First is Hello World. How is it?Out First is Hi World. How is it?I want…

Snigdha Paul November 30, 2024 No Comments

How to check if an html element exists or not using jQuery?

We can check an html element’s existence through checking its length. If length is greater than 0 that means element exist and if 0 that…

Snigdha Paul November 23, 2024 No Comments

How to add comments in regex?

We can explain our regular expression within the expression using comments. Syntax:(?#Commented Code) Suppose we have a two strings below:Hello worldhello World Regex to match…

Snigdha Paul November 16, 2024 No Comments

How to match a pattern consecutively exactly ‘n’ number of time? Fix issue raised by using {1},{2},…,{n}.

Suppose we want to search the word Hello for only two times side by side in a line and we write a regex (?:Hello){2} Now…

Snigdha Paul November 9, 2024 No Comments

How ‘group’ attribute works while looping a query coldfusion script?

We use group attribute to remove adjacent duplicate values in a ‘cfloop’. Let’s see a simple sytax of group attribute. Syntax : cfloop( query =…

Snigdha Paul November 2, 2024 No Comments

What is {1},{2}… etc. in regex?

When we search a pattern one or more time we use ‘*’. But Sometime we want to search a character or a pattern for a…

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