RegEx

Playground for practice https://regexr.com/ https://regex101.com/

Pattern Matching

Regex Syntax

/<regex pattern>/

Starts with wild card character

^

Ends with wcc

$

set enclosed in

[set]
[^invert-set]

only numbers

^[0-9]+$
^\d+$

only characters

^[a-zA-Z]+$
^\w+$

occurance wcc

* => any number of occurrence
? => 0 or 1 occurrence
+ => 1 or many occurrence

e.g. adarsh mishra
to match 1 space /adarsh\smishra/
to match multiple space /adarsh\s+mishra/
to match 0 or many spaces /adarsh\s*mishra/

no special characters

^[0-9a-zA-Z\s]+$

limited characters or numbers

^[0-9]{6}$
^[a-z]{3}$

min / max range characters or numbers

^[0-9]{3,6}$
^[a-z]{3,6}$

OR clause

^(chacha|bhatija)$

case insensitive

//i

global check

//g

search any pattern
(.) e.g. “https://www.youtube.com/watch?v=hw_HpTI_Wkw”.match(/v=(.)/)[1]

will return video id hw_HpTI_Wkw

Assignment

1. girls / boys name
2. phone number
3. find Indian zip code
4. valid name
5. email id
6. 8-12 character password
7. aadhaar number
8. pancard
9. name starts with vowels
10. names ends with vowels
11. names having only 5 characters
12. credit card number

Sample Text

1234567890
123453
DAVPS0412P
127836320613
9876543210
098762
xyz@yahoo.com
smita
&UJMmju7
shailesh
143258761937
priyanka
abc@gmail.com
112096851365
%TGBbgt5
priya