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Prateek Kumar answered on May 29, 2020 Popularity 10/10 Helpfulness 1/10

answer $regex

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{ <field>: /pattern/<options> }

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Source: www.mongodb.com

Tags: whatever

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Contributed on Apr 27 2022

Prateek Kumar

0 Answers Avg Quality 2/10

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regex

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Let regex;
/* shorthand character classes */
regex = /d/; // matches any digit, short for [0-9]
regex = /D/; // matches non-digits, short for [^0-9]
regex = /S/; // matches non-white space character
regex = /s/; // matches any white space character
regex = /w/; // matches character, short for [a-zA-Z_0-9]
regex = /W/; // matches non-word character [^w]
regex = /b/; // Matches a word boundary where a word character is [a-zA-Z0-9_]
These meta characters boast a pre-defined meaning and make various typical patterns easier to use.
/* matching using quantifiers */
regex= /X./; // matches any character
regex= /X*/; // Matches zero or several repetitions of letter X, is short for {0,}
regex= /X+-/; // matches one or more repetitions of letter X, is short for {1,}
regex= /X?/; // finds no or exactly one letter X, is short for is short for {0,1}.
regex= // d{3}; // matches three digits. {} describes the order of the preceding liberal
regex= // d{1,4} ; // means d must occur at least once and at a maximum of four
A quantifies helps developers to define how often an element occurs.
/* character ranges */
regex = /[a-z]/; // matches all lowercase letters
regex = /[A-Z]/; // matches all uppercase letters
regex = /[e-l]/; // matches lowercase letters e to l (inclusive)
regex = /[F-P]/; // matches all uppercase letters F to P (inclusive)
regex = /[0-9]/; // matches all digits
regex = /[5-9]/; // matches any digit from 5 to 9 (inclusive)
regex = / [a-d1-7]/; // matches a letter between a and d and figures from 1 to 7, but not d1
regex = /[a-zA-Z]/; // matches all lowercase and uppercase letters
regex = /[^a-zA-Z]/; // matches non-letters
/* matching using anchors */
regex = / ^The/; // matches any string that starts with “The”
regex = / end$/; // matches a string that ends with end
regex = / ^The end$/; // exact string match starting with “The” and ending with “End”
/* escape characters */
regex = / a/; // match a bell or alarm
regex = / e/; // matches an escape
regex = / f/; // matches a form feed
regex = / n/; // matches a new line
regex = / Q…E/; // ingnores any special meanings in what is being matched
regex = / r/; // matches a carriage return
regex = / v/; // matches a vertical tab
It is critical to note that escape characters are case sensitive
/* matching using flags */
regex = / i/; // ignores the case in pattern ( upper and lower case allowed)
regex = / m/; // multi-line match
regex = / s/; // match new lines
regex = / x/; // allow spaces and comments
regex = / j/; // duplicate group names allowed
regex = / U/; // ungreedy match

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jul 16 2021

jub0t

0 Answers Avg Quality 2/10

regex /

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// replaces all / in a String with _
str = str.replace(/\//g,'_');

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on May 29 2020

Expensive Elk

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regex

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// "/^[a-zA-Z]+$/" 		for alphabetics;
// "/^[0-9]+$/" 		for numerics;
// "/^[a-zA-Z0-9]+$/" 	for alphanumerics;
// "/^\pL+$/u" 			for uni alphas;
// "/^\pN+$/u" 			for uni numerics;
// "/^[\pL\pN]+$/u"		for uni alphanumerics;

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Source: Grepper

Tags: regex rege

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Contributed on Sep 17 2022

Alijah Mckale Rodis

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Regex

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Great site to verify your regular expressions: https://regexr.com/

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on May 16 2022

Coder-Kyle

0 Answers Avg Quality 2/10

regex pattern

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regex pattern

Only lowercase letters and numbers are allowed. Spaces are also not allowed
pattern="^[a-z0-9_\-]+$"


Must contain at least one number and one uppercase and lowercase letter, and at least 8 or more characters
pattern="(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,}"

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Source: Grepper

Tags: regex rege

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Contributed on Jun 07 2023

Bilal Ahmad

0 Answers Avg Quality 2/10

regex

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build your own regex:
https://regex101.com/

Popularity 10/10 Helpfulness 2/10 Language whatever

Source: regex101.com

Tags: expression e

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Contributed on Aug 03 2022

hirohito

0 Answers Avg Quality 2/10

RegExp

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/[A-Z]/  : 'must contain one uppercase'

/([a-z])/  : 'must contain one lowercase'

/(\d)/  : 'must contain one number'

/(\W)/  : 'must contain one special character'
Let regex;
/* shorthand character classes */
regex = /d/; // matches any digit, short for [0-9]
regex = /D/; // matches non-digits, short for [^0-9]
regex = /S/; // matches non-white space character
regex = /s/; // matches any white space character
regex = /w/; // matches character, short for [a-zA-Z_0-9]
regex = /W/; // matches non-word character [^w]
regex = /b/; // Matches a word boundary where a word character is [a-zA-Z0-9_]
These meta characters boast a pre-defined meaning and make various typical patterns easier to use.
/* matching using quantifiers */
Let regex;
/* shorthand character classes */
regex = /d/; // matches any digit, short for [0-9]
regex = /D/; // matches non-digits, short for [^0-9]
regex = /S/; // matches non-white space character
regex = /s/; // matches any white space character
regex = /w/; // matches character, short for [a-zA-Z_0-9]
regex = /W/; // matches non-word character [^w]
regex = /b/; // Matches a word boundary where a word character is [a-zA-Z0-9_]
These meta characters boast a pre-defined meaning and make various typical patterns easier to use.
/* matching using quantifiers */

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Source: Grepper

Tags: whatever whateve

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Contributed on Jul 07 2022

Shiltry

0 Answers Avg Quality 2/10

regex

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import re
reload (re)

r = re.compile("([0-9]+)([a-zA-Z]+)([0-9]+)")
m = r.match("123ab1234")
if m:
    print m.group(1)
    print m.group(2)
    print m.group(3)

else:
    print "no match"

Popularity 10/10 Helpfulness 1/10 Language python

Source: gis.stackexchange.com

Tags: python py

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Contributed on Jun 21 2021

sree_007

0 Answers Avg Quality 2/10

$regex

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{ <field>: { $regex: /pattern/, $options: '<options>' } }
{ <field>: { $regex: 'pattern', $options: '<options>' } }
{ <field>: { $regex: /pattern/<options> } }

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Source: www.mongodb.com

Tags: whatever whateve

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Contributed on Apr 27 2022

Prateek Kumar

0 Answers Avg Quality 2/10

regex

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^The        matches any string that starts with The -> Try it!
end$        matches a string that ends with end
^The end$   exact string match (starts and ends with The end)
roar        matches any string that has the text roar in it

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Source: medium.com

Tags: regex rege

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Contributed on May 09 2022

Wicked Worm

0 Answers Avg Quality 2/10

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