Regular expressions: Difference between revisions
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=={{header|Emacs Lisp}}== |
=={{header|Emacs Lisp}}== |
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<lang Emacs Lisp> |
<lang Emacs Lisp> |
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(defun match ( |
(defun match (word str) |
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( |
(setq pos (string-match word str) ) |
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(if pos |
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(progn |
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| ⚫ | |||
(insert (format "%s found at position %d in: %s\n" word pos str) ) |
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(setq regex (format "^.+%s" word) ) |
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(setq str (replace-regexp-in-string regex (format "left %s" word) str) ) |
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(setq regex (format "%s.+$" word) ) |
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(setq str (replace-regexp-in-string regex (format "%s right" word) str) ) |
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(insert (format "result: %s\n" str) )) |
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| ⚫ | |||
(setq str1 "before center after" str2 "before centre after") |
(setq str1 "before center after" str2 "before centre after") |
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(progn |
(progn |
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(match |
(match "center" str1) |
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( |
(insert "\n") |
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(match "center" str2) ) |
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</lang> |
</lang> |
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<b>Output:</b> |
<b>Output:</b> |
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<pre> |
<pre> |
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center found in: before center after |
center found at position 7 in: before center after |
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result: left center right |
result: left center right |
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center not found in: before centre after |
center not found in: before centre after |
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</pre> |
</pre> |
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