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--- cheat_sheets_regex [2022/09/25 14:32] – [POSIX] gman
+++ cheat_sheets_regex [2023/02/11 14:34] (current) – [Groups and Ranges] gman
@@ Line 48: / Line 48: @@
 |  [A-Q]       | Upper case letter from A to Q      |
 |  [0-7]       | Digit from 0 to 7                  |
+Use a group to "capture and replace".
+  * ''a(bc)'' parentheses create a capturing group with value ''bc''
+  * The parentheses are used to create "groups," which then get assigned a base-1 index, accessible in a //replace// with a ''$'' (i.e., the first parentheses-bounded (characters) become a group that can be referenced by ''$1'', the second group would be ''$2'', the third ''$3'', etc.).
+  * NOTE: in **gedit** you reference with a backslash: ''\'' not a ''$'' (i.e., ''\1\2\3'', etc.).
+  * See the follow table regarding **string replacements**.
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