VScode - replace captured group with the values

Question

i have a bunch of strings in code such as: and in one file.

The goal is to replace from first example with 0, while from second example with - (dash)

I'm using VScode regex, but I can't find the way to replace captured groups with specific values, as $1, $2 groups refer to original string groups. This one is just example, how I'm trying to achieve this, but VScode don't ignore grouped regex.

user_836330 · Answer

An alternative process is to use a snippet which can do conditional replacements. With this snippet:

    "replaceTDs": {
      "prefix": "tdr",    // whatever prefix you want 
      "body": [
        "${TM_SELECTED_TEXT/(?<=\">)( )|( )/${1:+0}${2:+-}/g}",
      ]
    }

The conditional replacements can be quite simple since you first find and select only the two alternative texts you are interested in. So

find: | old version

This simpler find will probably work for you:

Don't replace, rather Control+Shift+L : selects all your two alternatives. Esc to focus on editor from the find widget.

Then apply your snippet, in this case type tdr+Tab

and all the changes are made. You just have to make the snippet one time and then do a single find.

This technique scales a little better than running as many find/replaces as you have replacements to do. Even with more conditional replacements it would probably be a simple change to the one snippet to add more replacements.

Also you can simplify this even more if you use a keybinding to trigger your snippet (you don't have to change focus from the find widget - or create the separate snippet). So with no snippet, but this keybinding:

 {
    "key": "alt+w",
    "command": "editor.action.insertSnippet",
    "args": {
      "snippet": "${TM_SELECTED_TEXT/(?<=\">)( )|( )/${1:+0}${2:+-}/g}"  
    },
    "when": "editorHasSelection"
  }

now the same demo:

user_3832970 · Answer

You can use

Search for (?<=) (?=) and replace with 0, and
Search for and replace with -, no need for a regex here.

Note that capturing groups are meant to keep captured substrings.

The first pattern matches

(?<=) - a place in string that is immediately preceded with , one or more whitespaces, style=", any zero or more chars other than " and then a >


  - a literal string
(?=) - immediately to the right, there must be .

VScode - replace captured group with the values

2 Answers