Loop over tuples in bash?

by 
$ for i in c,3 e,5; do IFS=","; set -- $i; echo $1 and $2; done
c and 3
e and 5

About this use of set (from man builtins):

Any arguments remaining after option processing are treated as values
for the positional parameters and are assigned, in order, to $1, $2,
… $n

The IFS="," sets the field separator so every $i gets segmented into $1 and $2 correctly.

Via this blog.

Edit: more correct version, as suggested by @SLACEDIAMOND:

$ OLDIFS=$IFS; IFS=','; for i in c,3 e,5; do set -- $i; echo $1 and $2; done; IFS=$OLDIFS
c and 3
e and 5

More Related Contents:

  1. How do I iterate over a range of numbers defined by variables in Bash?
  2. Looping over pairs of values in bash [duplicate]
  3. How to loop over files in directory and change path and add suffix to filename
  4. How to perform a for loop on each character in a string in Bash?
  5. How to skip the for loop when there are no matching files?
  6. Looping through alphabets in Bash
  7. How to parallelize for-loop in bash limiting number of processes
  8. How do I write a ‘for’ loop in Bash?
  9. How to add leading zeros for for-loop in shell? [duplicate]
  10. Using a variable in brace expansion range fed to a for loop
  11. How do I parse command line arguments in Bash?
  12. How do I set a variable to the output of a command in Bash?
  13. Read a file line by line assigning the value to a variable [duplicate]
  14. What is indirect expansion? What does ${!var*} mean?
  15. ‘\r’: command not found – .bashrc / .bash_profile [duplicate]
  16. How to apply shell command to each line of a command output?
  17. What do double-asterisk (**) wildcards mean?
  18. How to split strings over multiple lines in Bash?
  19. Creating a string variable name from the value of another string
  20. Passing arguments by reference
  21. How do I remove all .pyc files from a project?
  22. Sorting strings with numbers in Bash [duplicate]
  23. Get current directory or folder name (without the full path)
  24. What does the double-asterisk (**) wildcard mean?
  25. Checking host availability by using ping in bash scripts
  26. using jq to assign multiple output variables
  27. -bash: !”: event not found [closed]
  28. How to substitute quoted, multi-word strings as arguments?
  29. Why do my setuid root bash shell scripts not work?
  30. Preserving leading white space while reading>>writing a file line by line in bash

Leave a Comment