</>💲
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#regex
#code anchor
#syntax anchor
#shell script
#end anchor
#regular expression
#pattern syntax
📝🔍💻
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#programming language
#text processing
#regular expression
#regex
#scripting
[a-zA-Z0-9]
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#alphanumeric
#regex
#regular expression
#validation rule
#character class
#pattern matching
#regex #code anchor #syntax anchor #shell script #end anchor #regular expression #pattern syntax