Weekly - issue 36

2023-07-23

# input.txt
col1 col2

read col1 col2 < <(grep -E -i -m 1 col input.txt)

Return status, 0: one line was selected, 1: nothing selected.

This is process substitution in Bash or Zsh.

command1 & command2

Executes both command1 and command2 at the same time.

Using an ampersand sends the process to the background, allowing the next command to start immediately.

(command1 ; command2) & command3

Run command1 and command2 simultaneously but will only initiate command3 once both have completed.

List developer tools and the features they support.