Just a simple question.
I have an array:
array=("1 2 3" "4 5 6")
If I do:
echo ${array[0]}
echo ${array[1]}
1 2 3 or 4 5 6 will be shown.
However, if I do:
for iter in ${array[@]}
do
echo $iter
done
The shown value is not as I expected.... Can anyone give me the right way to use it?
Quotation is what you need:
for iter in "${array[@]}"; do
echo "$iter"
done
iter variable is not really needed, isn't it?
$iter will undergo word-spliting before each word is passed as a separate argument to echo. Quoted, the entire string is passed as a single argument. Compare with something like iter="a b" (there are supposed to be multiple spaces between a and b).for iter in "${array[@]}"; do printf "%s\n" $iter; done and for iter in "${array[@]}"; do printf "%s\n" "$iter"; done and yea that multiple spaces example is good to understand the reason too. Thanks again! :)
"${array[@]}" -- See gnu.org/software/bash/manual/bashref.html#Arrays and look for the paragraph containing "when the word appears within double quotes"