| User: editor -- 2012-01-25 << 905 907 >> |
| Hits: 55 |
| Type: Regular expression replace |
| Search all Regular expression replace examples |
| Description: |
| How to search and replace text for specified number of occurrences(times) using regular expression? For example, I want to search the first 3 numbers(with regular expression \d+), and multiply them by 2. |
| Input Sample: |
| the first number is 10, the second number is 20, the third is 30, the fourth is 40 |
| Output Sample: |
| the first number is 20, the second number is 40, the third is 60, the fourth is 40 |
| Answer: |
| Hint: You need to Download and install "Replace Pioneer" on windows platform to finish following steps. |
| With Replace Pioneer, you can use 'unit number filter' to control how many occurrences you want to search and replace a string, even if you are using a regular expression. 1. ctrl-o open text file 2. ctrl-h open 'replace' dialogue * set 'search for pattern' to the text you want to search: * set 'unit number filter' to the occurrences you want to search(5..10 means 5,6,7,8,9,10): * set 'replace with pattern' to the text you want to replace(you can use function here!): 3. click 'replace', done. 4. ctrl-s save to file. |
Screenshot 1: Replace_Window |
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Check Demo of Regular expression replace |
| Keywords: |
| 101 control multiply even unit number filter number filter replace a string a string string function regular expression example replace how to multiply file replace first string text pattern filter replace with pattern regular expression filter number how to replace a string replace example |