How To Replace Case-Sensitive Text In Vim?

2025-07-03 07:18:24 241

3 Answers

Bennett
Bennett
2025-07-06 06:58:41
I've been using Vim for years, and replacing case-sensitive text is one of those things that feels like a superpower once you master it. The basic command is :%s/oldText/newText/g, but if you want case sensitivity, you need to add \C to enforce it. For example, :%s/\ColdText/newText/g will only match 'oldText' exactly as written, ignoring 'OldText' or 'OLDTEXT'. I often pair this with the 'c' flag for confirmation, like :%s/\ColdText/newText/gc, so I can review each change. Vim's regex can be tricky, but this combo saves me hours when refactoring code or fixing typos in docs.
Josie
Josie
2025-07-05 20:38:47
When working in Vim, precise text replacement is crucial, especially for coding. For case-sensitive substitutions, the :substitute command is your friend. The key is using \C in your pattern to force case matching. For instance, :%s/\Cexample/EXAMPLE/g will only replace 'example', not 'Example' or 'EXAMPLE'.

If you need more control, combining flags helps. Adding 'i' makes it case-insensitive (:s/\Cexample/EXAMPLE/gi), while 'I' (capital i) enforces case sensitivity even without \C. I frequently use :%s/\C\/replacement/g to match whole words, avoiding partial matches. Remember, escaping special chars with \ is vital—like :%s/\C\. xt/\.log/g for file extensions.

For bulk edits, I sometimes record macros with q followed by substitutions, then replay them with @. This workflow is unbeatable for large projects.
Xander
Xander
2025-07-06 16:17:12
As someone who writes both prose and code in Vim, I rely heavily on case-sensitive replacements. The magic happens with the \C modifier—it turns :%s/pattern/replacement/ into a case-sensitive hunt. For example, :%s/\CError/FAILURE/g changes only 'Error', leaving 'error' untouched.

I also love using \v for very magic mode to simplify regex. :%s/\v\C(foo|bar)/BAZ/g replaces 'foo' or 'bar' but not 'Foo'. For interactive edits, :%s/\Cpattern/replace/gc lets me skip or confirm each match. Pro tip: wrapping patterns with \< and \> ensures whole-word matches—:%s/\C\/dog/g won't touch 'category'.

When dealing with mixed-case data, I occasionally chain commands like :g/\CERROR/d to delete all lines containing the exact string 'ERROR'.
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