Wrong Count on Chapter 2: Question g
jusuchin85 opened this issue · comments
The question:
Find total count of whole word
the(irrespective of case).$ grep ##### add your solution here 8090
does not return 8090, but rather 7941:
Hmm, not sure what could be the issue. What do you get if you try LC_ALL=C grep -iow 'the' dracula.txt | wc -l ?
Also, what is your GNU grep version? I just checked with 3.4 and 3.6, and I got 8090 (rg -ciow 'the' dracula.txt also matched this number).
$ wget https://www.gutenberg.org/files/345/old/345.txt -O dracula.txt
--2022-11-21 14:53:55-- https://www.gutenberg.org/files/345/old/345.txt
Resolving www.gutenberg.org (www.gutenberg.org)... 2610:28:3090:3000:0:bad:cafe:47, 152.19.134.47
Connecting to www.gutenberg.org (www.gutenberg.org)|2610:28:3090:3000:0:bad:cafe:47|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 883158 (862K) [text/plain]
Saving to: ‘dracula.txt’
dracula.txt 100%[======================>] 862.46K 287KB/s in 3.0s
2022-11-21 14:53:59 (287 KB/s) - ‘dracula.txt’ saved [883158/883158]
$ grep -iow 'the' dracula.txt | wc -l
8090Hey @learnbyexample ! I've tried again with the LC_ALL=C grep -iow 'the' dracula.txt | wc -l command, and same result. I do think it's something to do with my grep version (currently on 2.6?):
You're right! I've upgraded my grep to 3.8 via Homebrew, and now I'm getting what you've mentioned:
Sorry, this is a non-issue. I didn't realise that different versions of grep would output differently. 😃
BSD grep has plenty of issues like this. For example, https://unix.stackexchange.com/questions/352977/why-does-this-bsd-grep-result-differ-from-gnu-grep, https://unix.stackexchange.com/questions/398223/grep-strange-behaviour-with-single-letter-words and https://unix.stackexchange.com/questions/428340/how-to-make-bsd-grep-respect-start-of-line-anchor
Also, GNU grep has features not present in other implementations.