Re^3: polishing up a json fetching script for weather data

system ("cat $file | jq '[.paths.get]' >7.txt");

I very strongly recommend against doing it this way, for several reasons: First, you're using the shell's features, namely piping a file into jq when that's not necessary - jq filter files works just as well. Second, you're using the single-argument form of system, and interpolating a variable into that, opening yourself up to all sorts of possible issues; I describe that and several better alternatives here, in this case I might suggest capturex from IPC::System::Simple. Third, calling an external command in the first place - everything that jq can do, you can do just as well in Perl, by parsing the JSON file into a Perl data structure and then working with that data structure.

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Re^4: polishing up a json fetching script for weather data by Aldebaran (Curate) on May 23, 2020 at 08:20 UTC
I very strongly recommend against doing it this way, for several reasons: First, you're using the shell's features, namely piping a file into jq when that's not necessary - jq filter files works just as well. I've read and worked through your post on varying system calls and am glad to have another link to it. The system call was a band-aid, because jq can't seem to do anything directly: `$ pwd /home/hogan/Documents/hogan/json_stuff $ ls 1.openapi.json 2.weather.json russian-words.json 1.weather.json countries.geo.json snapshots $ jq '.' 1.openapi.json jq: error: Could not open file 1.openapi.json: Permission denied $` [download] Apparently I used 'snap' to install it: `$ history \| grep jq 1376 curl 'https://api.github.com/repos/stedolan/jq/commits?per_page +=5' 1377 jq '.[] \| {message: .commit.message, name: .commit.committer.na +me}' 1378 sudo snap install jq` [download] I tried to raise priveleges with: `1429 chmod a+x snap/bin/jq 1430 chmod a+x /snap/bin/jq 1431 sudo chmod a+x /snap/bin/jq` [download] , without success (??)	[reply] [d/l] [select]
Re^5: polishing up a json fetching script for weather data by haukex (Archbishop) on May 23, 2020 at 08:23 UTC
`jq: error: Could not open file 1.openapi.json: Permission denied` It's complaining about the file `1.openapi.json`, not the `jq` executable; try `chmod a+r 1.openapi.json` (if you don't mind giving everyone read access).	[reply] [d/l] [select]