{"id":66,"description":"bash - a quick note on arrays","tags":["bash","shell","programming"],"contents":["arr=() # Create empty array","arr+=(5) # Append a number to array","arr+=(xyz) # Append a text to array; arrays can have numbers and strings","${arr[@]} # Get all items from the array","${!arr[@]} # Get all indices of the array. Index starts at 0","${arr[3]} # Get the fourth item from the array","${arr} # Get first item from the array. Equivalent to ${arr[0]}","${arr[@]:i:n} # Get n elements starting at index i","arr=( $(cmd) ) # Save output of a command into an array","# Sample for loop","for item in ${arr[@]};do","    echo $item","done"]}