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--exit-status / -e: Sets the exit status of jq to 0 if the last output value was neither false nor null, 1 if the last output value was either false or null, or 4 if no valid result was ever produced.

Normally jq exits with 2 if there was any usage problem or system error, 3 if there was a jq program compile error, or 0 if the jq program ran. How to know a JSON array is an empty array in bash? - Ask Ubuntu askubuntu.com https://askubuntu.com › questions › how-to-know-a-json... askubuntu.com https://askubuntu.com › questions › how-to-know-a-json...

String length To find the number of characters, use the length function. To find the number of actual bytes, use the utf8bytelength function. Strings in jq on Exercism exercism.org https://exercism.org › tracks › jq › concepts › strings exercism.org https://exercism.org › tracks › jq › concepts › strings

The exit status is an integer number. For the bash shell's purposes, a command which exits with a zero (0) exit status has succeeded. A non-zero (1-255) exit status indicates failure.

Read the Exit Code from a script Exit code can also be read from the bash script using $?. It can either be assigned to a variable or displayed directly in the echo command. Let's write a sample script list.sh which would list two files and display the exit code based on the file presence.

jq normally returns with exit code 0 if the jq program and and input data are valid, regardless of the program's output. Adding the -e flag causes jq to return with exit code 1 if the output is null or false and 0 otherwise.

jq , a command-line JSON processing tool, is a good solution for dealing with machine-readable data formats and is especially useful in shell scripts. Using jq can aid you when you need to manipulate data. For example, if you run a curl call to a JSON API, jq can extract specific information from the server's response. How To Transform JSON Data with jq - DigitalOcean digitalocean.com https://.digitalocean.com › community › tutorials digitalocean.com https://.digitalocean.com › community › tutorials