Regular Expression - Add a character before/after each word

问题

Using Notepad++ and replace function, I tried to add a symbol "+" or "[" before each word of my list.

Example of list :

• blue car
• red car big
• red car small
• green car big
• green car small

I'm looking for the following result :

• +blue +car
• +red +car +small
• +red +car +big
• .. etc

I know how to add a character befor each line... but I cannot find the way to add it in front of every word without using replace "blue" to "+blue".

回答1:

A cross platform solution should be

Search: \b\w+\b (or \b[[:alpha:]]+\b)
Replace: +$&

Search pattern details:

• \b - a leading word boundary
• \w+ - 1 or more word chars (if [[:alpha:]]+ is used, 1+ letters)
• \b - a trailing word boundary

Replacement details: + is a literal plus, and $& is the backreference to the whole match.

See the screenshot:

回答2:

(see screenshot below)

• open the Find/Replace dialog (Ctrt+H)
• in the Find input, enter this regex: (\b\w) which means "word boundary followed by a letter"
• in the Replace with input, enter this replacement: +\1 which means "put a + sign followed by whatever was matched between the regex parenthesis"
• click Show advanced options checkbox
• click Search with regular expressions radio button
• then hit Replace button as many times as you want, or use Replace all for once

EDIT: for Windows is pretty much the same (see the find/replace dialog http://sqlblog.com/blogs/jamie_thomson/image_1AFC2B61.png) the Regular Expression option is at the bottom left

来源：https://stackoverflow.com/questions/40614144/regular-expression-add-a-character-before-after-each-word