zsh function to hash a string Use it for hostname colouring in your prompt!

gistfile1.sh

function string_hash() {
  HASHSTR=$1
  HASHSIZE=$2

  HASHVAL=0

  for i in {1..${#HASHSTR}}; do;
    THISCHAR=$HASHSTR[$i]
    HASHVAL=$(( $HASHVAL + $((#THISCHAR)) ))
  done
  
  # Avoid 0 as that's black
  HASHSIZE=$(( $HASHSIZE - 1 ))
  HASHVAL=$(( $HASHVAL % $HASHSIZE ))
  HASHVAL=$(( $HASHVAL + 1 ))
  
  echo $HASHVAL
}