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919.Advanced search and replace -- How to add a leading zero to all 4 digit numbers in multiple files?

User: Vlad -- 2012-02-13          << 918  920 >>
Hits: 1689
Type: Advanced search and replace   
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I have some files that have missing zero. Is there a way to add zero to all 4 digit numbers? Example: find gifts in xxxx but it must be 0XXXX. Is that something we can do? and also on the page I would have about 20 of those XXXX instead of 0XXXX so is there a way to fix it? Thanks.
Input Sample:
find gifts in 2345 
Output Sample:
find gifts in 02345 
Hint: You need to Download and install "Replace Pioneer" on windows platform to finish following steps.
1. open "Tools->Batch Runner" menu
2. drag multiple files from "window file browser" to "batch runner" window
3. click "fast replace" to open "fast replace" dialogue 
4. click "add" to add new search/replace rule
* set "search" to 
* set "replace" to 
* click "ok"
5. make sure "regular exp" option is checked, then click "Start" and click "Yes", done!

Note: please backup your files to avoid mis-operation.

Screenshot 1:  Fast_Replace_Window

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