Looping in Bash

Basic Loops

In bash, looping can be done like so:

for i in **/*.md; do
  # do something with i
done

This lets us set get the value of every iteration, but we can’t access the index.

Looping with Index

Assuming we have an array of items, and we want to get the index of their items as well:

items=(10,20,30)
for i in ${!items[@]}; do
  echo "Key: $i"
  echo "Value: ${allThreads[$i]}"
done

Calculating Array Length

Array lengths can be calculated like so:

items=(10, 20, 30)
${#items[@]}