6 ms·
Here are some ways you could simplify some of the tasks in the article, saving on typing: cat data.csv | sed 's/"//g' can be simplified by doing this inst
by ibern 7y ago
Here are some ways you could simplify some of the tasks in the article, saving on typing:
cat data.csv | sed 's/"//g'
can be simplified by doing this instead:
cat data.csv | tr d '"'
This awk command:
cat sales.csv | awk -F',' '{print $1}' | sort | uniq
Can be replaced with a simpler (IMO) cut instead:
cat sales.csv | cut -d , -f 1 | sort | uniq
When using head or tail like this:
head -n 3
You don't need the -n:
head -3
Also shout out to jq, xsv, and zsh (extended glob), all nice complements to the typical command line utils.
- dvrx 7y agoI like cut and tr too, but I try to replace them by sed and awk when I can. I reduces the number of moving parts, and allows you to increase the complexity slowly. Ex: | sed -e step1 becomes | sed -e step1 -e step2 instead of adding another pipe and another "moving part" like tr
- gnufx 7y agoIf you want to simplify things, don't employ "useless us of cat". Pass the file as a command arg or re-direct input. And sort has options, so the third/fourth commands can be sort -u -t, sales.csv However, those fail with quoted commas. Also, head -3 is non-POSIX obsolete syntax. Edit: I don't know why I didn't see other UUOC references initially.
- mnaydin 7y agoThe awk command cat sales.csv | awk -F',' '{print $1}' | sort | uniq can even be further simplified to cut -d, -f1 sales.csv | sort -u