Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
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syntax:pe [2021/12/10 08:11] ajrou [From the end] |
syntax:pe [2021/12/10 08:12] (current) ajrou [From the end] |
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| The operator "''#''" will try to remove the shortest text matching the pattern, while "''##''" tries to do it with the longest text matching. Look at the following examples to get the idea (matched text <del>marked striked</del>, remember it will be removed!): | The operator "''#''" will try to remove the shortest text matching the pattern, while "''##''" tries to do it with the longest text matching. Look at the following examples to get the idea (matched text <del>marked striked</del>, remember it will be removed!): | ||
| ^Syntax^Result^ | ^Syntax^Result^ | ||
| - | |''${MYSTRING#*in}''|<del>Be liberal in</del> what you accept, and Be conservative in what you send| | + | |''${MYSTRING#*in}''|<del>Be liberal in</del> what you accept, and conservative in what you send| |
| - | |''${MYSTRING##*in}''|<del>Be liberal in what you accept, and Be conservative in</del> what you send| | + | |''${MYSTRING##*in}''|<del>Be liberal in what you accept, and conservative in</del> what you send| |
| ==== From the end ==== | ==== From the end ==== | ||
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| In the second form everything will be the same, except that Bash now tries to match the pattern from the end of the string: | In the second form everything will be the same, except that Bash now tries to match the pattern from the end of the string: | ||
| ^ Syntax ^ Result ^ | ^ Syntax ^ Result ^ | ||
| - | | ''${MYSTRING%in*}'' | Be liberal in what you accept, and Be conservative <del>in what you send</del> | | + | | ''${MYSTRING%in*}'' | Be liberal in what you accept, and conservative <del>in what you send</del> | |
| - | | ''<nowiki>${MYSTRING%%in*}</nowiki>'' | Be liberal <del>in what you accept, and Be conservative in what you send</del> | | + | | ''<nowiki>${MYSTRING%%in*}</nowiki>'' | Be liberal <del>in what you accept, and conservative in what you send</del> | |
| The second form nullifies variables that begin with ''in'', by working from the end. | The second form nullifies variables that begin with ''in'', by working from the end. | ||