Parameters + arrays in unix shell

puttster · October 5, 2010, 2:39pm

Say I have ./param HEY

What would I do if I wanted to store each character into an array?

Example.

ARRAY1[0]="H"
ARRAY1[1]="E"
ARRAY1[2]="Y"

thank you!

frans · October 5, 2010, 5:04pm

S="HELLOWORLD"
for ((i=0; i<${#S}; i++))
do A[$i]=${S:$i:1}
done

Chubler_XL · October 5, 2010, 6:01pm

Neat /bin/bash solution frans, here is one with /bin/sh

#!/bin/sh
i=1
LEN=$( echo $1 | wc -c )
while [ $i -lt $LEN ]
do
   ARRAY[$i]="$( echo $1 | cut -c$i )"
   let i=i+1
done
echo Element #3 is ${ARRAY[3]}

puttster · October 5, 2010, 9:39pm

chubler_xl:

Neat /bin/bash solution frans, here is one with /bin/sh

#!/bin/sh
i=1
LEN=$( echo $1 | wc -c )
while [ $i -lt $LEN ]
do
   ARRAY[$i]="$( echo $1 | cut -c$i )"
   let i=i+1
done
echo Element #3 is ${ARRAY[3]}

I like this answer!

danmero · October 5, 2010, 9:50pm

I don't look like your sh is symlinked to bash

Did you know that

Should be

LEN=${#$1}

puttster · October 5, 2010, 10:46pm

why is that?