CODEWITHSUNDEEP
vim
shin
shin

Reputation: 32721

Detecting decimals in vim

I'd like to create a shortcut to convert rem to px and px to rem for CSS file in vimrc.

""""for converting px to rem""""
nnoremap <Leader>rem :%s; \(\d*\)px;\= string(submatch(1) / 16.0) . "rem";
""""for converting rem to px"""
nnoremap <Leader>px :%s; \(\d*\)rem;\= string(submatch(1) * 16.0) . "px";

The first one works but not the second one. When rem has a decimal, it doesn't convert to px.

How can I improve this code?

======= After the help of KoRoN the following is my final solution

""""for converting px to rem""""
nnoremap <Leader>rem :%s;\<\(\d*\)px;\= float2nr(submatch(1) / 16.0) . "rem";
""""for converting rem to px"""
nnoremap <Leader>px :%s;\<\(\d\+\%(\.\d\+\)\?\)rem;\= float2nr(str2float(submatch(1)) * 16.0) . "px";

Upvotes: 0

Views: 172

Answers (1)

KoRoN
KoRoN

Reputation: 375

Try to use \(\d\+\%(\.\d\+\)\?\) instead of \(\d*\) for decimal (float).

This pattern is not perfect, but will cover most of cases. And you should convert string to float by using str2float.

As a result of these, your second map should be like this:

nnoremap <Leader>px :%s; \(\d\+\%(\.\d\+\)\?\)rem;\= string(str2float(submatch(1)) * 16.0) . "px";

Upvotes: 2

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