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This tip helps group lines with the same pattern at the current cursor column, assuming that the lines have already been sorted so that lines with the same pattern occur consecutively. Applying this tip will insert a blank line after each group of matching lines.
The following code defines a function and a mapping to call the function:
" Press y to yank the wanted text, before calling function. nnoremap <F9> :call GroupMatchingLines()<CR> function! GroupMatchingLines() let pattern = strpart(getline('.'), col('.') - 1, strlen(@@)) if !empty(pattern) let pattern = escape(pattern, '\.*$^~[') let col_cursor = col('.') let pattern = '\%'.col_cursor.'c'.'\('.pattern.'\)\@!' let [rowm,colm] = searchpos(pattern,'W') if rowm > 0 .-1put ='' exe 'normal! j'.col_cursor.'|' return endif endif echo 'String not found' endfunction
Assume you have sorted some lines using the four characters under the "xxxx" as the sort key (the "xxxx" line is not part of the data):
..........xxxx.......... 00003710001*019062728001 00004010001*019172721001 00001720001*010094721001 00004019001*021072721008 01002710001*020092721001 00004710001*031022121061 00204312001*030092721001 00004710001*031072721001
Visually select the string
1*01 in the first line, under "xxxx", then press
y to copy the text. Now you can press F9 to group lines that match at the same column position. Each time you press F9, a blank line is inserted before the next line that does not match the current pattern. The following shows the text after pressing F9 twice:
00003710001*019062728001 00004010001*019172721001 00001720001*010094721001 00004019001*021072721008 01002710001*020092721001 00004710001*031022121061 00204312001*030092721001 00004710001*031072721001
The function assumes that the unnamed register (
@") holds a copy of the text that you want matched. Only the length of the text is used. Each time that the function is called, it builds a search pattern using the current position of the cursor and the length of the text in the unnamed register. Special characters (
\.*$^~[) are escaped, and so can be used in the pattern. In the above example, the text is "
1*01". The search pattern created is
\%11c\(1\*01\)\@! which consists of:
\%11cmatch at byte 11
\(1\*01\)grouped and escaped pattern
\@!match if the preceding does not match