The special global variables $1, $2, and so on, can be used to reference matches:
str="a123b45c678" if /(a\d+)(b\d+)(c\d+)/=~str puts "Matches are: '#{$1}','#{$2}','#{$3}'" end
W
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2008-03-28 12:37:58
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Groupings and backreferences 注意，不需要使用repr ...
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2021-10-25 11:04:00
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import re import urllib.parse # https://learnbyexample.github.io/py_regular_expressions/groupings-and-backreferences.html s = input("input string for ...
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2021-10-25 11:02:00
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Regular Expression Backreferences provide us a method to match a previously captured pattern a second time. For example we have an string, and we want
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2016-02-16 02:19:00
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