Hi,
fxkl4...@protonmail.com wrote:
> why doesn't grep count 2 commas
> echo 'Kích thước máy xay cỏ, giá máy thế nào , phụ tùng máy mua ở đâu' |
> grep -c ,
> 1
Happens with much simpler text too:
$ echo ',,,' | grep -c ','
1
The man page explains it:
-c, --count
Suppress normal output; instead print a count of matching lines
for each input file. With the -v, --invert-match option (see
below), count non-matching lines. (-c is specified by POSIX.)
Note that it counts lines, not characters.
Counting characters by grep seems somewhat tricky:
https://www.unix.com/shell-programming-and-scripting/128033-grep-command-count-characters.html
An answer to this question
https://stackoverflow.com/questions/16679369/count-occurrences-of-a-char-in-a-string-using-bash
proposes
echo "referee" | tr -cd 'e' | wc -c
$ echo ',,,' | tr -cd ',' | wc -c
3
$ echo 'Kích thước máy xay cỏ, giá máy thế nào , phụ tùng máy mua ở đâu' | tr
-cd ',' | wc -c
2
(I hope i did not quote something that's against the code of conduct. :))
Have a nice day :)
Thomas
