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grel general expression character classes Code Example
grel general expression character classes 
* metacharacters
* character escapes \
* anchors \A\Z or ^$
* character classes [][^]
* quantifiers *?+{min,max}
* grouping ()
* substitutions $1 or \1
Source: gist.github.com
grel general expression character classes 
\p{L} - letter
\p{P} - punctuation
\p{InBasicLatin} - in basic Latin Unicode block
\p{InArabic} - in Arabic Unicode block
Source: gist.github.com
grel general expression character classes 
. any character (almost*) 
\ escape character
| or
\A or ^ anchor: start of string
\Z or $ anchor: end of string
[] list or range to be matched
[^] negative list or range (NOT these characters)
Source: gist.github.com
grel general expression character classes 
\d any digit
\D any non-digit
\w any word character [a-zA-Z0-9_]
\W any non-word char. [^a-zA-Z0-9_]
\s any whitespace char.
\S any non-whitespace char.
\t tab
\n newline
\r carriage return
Source: gist.github.com



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Category:
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Sub Category:
 Code Example
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