Created
August 5, 2021 17:29
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Bash Array Cheatsheet
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| ║ Syntax ║ Result ║ | |
| ╠═════════════════╬════════════════════════════════════════╣ | |
| ║ arr=() ║ Create empty array ║ | |
| ║ arr=(1 2 3) ║ Initialize array ║ | |
| ║ ${arr[2]} ║ Retrieve third element ║ | |
| ║ ${arr[@]} ║ Retrieve all elements ║ | |
| ║ ${!arr[@]} ║ Retrieve array indices ║ | |
| ║ ${#arr[@]} ║ Calculate array size ║ | |
| ║ arr[0]=3 ║ Overwrite 1st element ║ | |
| ║ arr+=(4) ║ Append value(s) ║ | |
| ║ str=$(ls) ║ Save ls output as string ║ | |
| ║ arr=( $(ls) ) ║ Save ls output as array of files ║ | |
| ║ ${arr[@]:s:n} ║ Elements at indices n to s+n ║ | |
| ║ ${str//ab/c} ║ For a given string, replace ab with c ║ | |
| ║ ${arr[@]//ab/c} ║ For each array item, replace ab with c ║ | |
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