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Saw the previous revision :/ Made the sh-example even simpler

immeëmosol
2024-01-13 20:26:49 +01:00
parent 76f0fa3a74
commit 8babd91441
1 changed files with 14 additions and 4 deletions
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18
SC2031.md

@@ -18,13 +18,23 @@ n=0
while read i; do (( n+=i )); done < <(printf "%s\n" {1..10}) while read i; do (( n+=i )); done < <(printf "%s\n" {1..10})
echo $n echo $n
``` ```
In `sh`, temporary files, FIFOs or file descriptors can be used instead. When the output of the command can be stored to a variable before entering the loop, here documents are a preferable alternative: In `sh`, temporary files, FIFOs or file descriptors can be used instead. When the output of the command can be stored to a variable before entering the loop, here documents are a preferable alternative.
```sh ```sh
n=0 n=0
SUMMANDS="$(printf '%s\n' 1 2 3 4 5 6 7 8 9 10)" SUMMANDS="1
while read i; do n=$(( n + i )); done <<SUMMANDS_INPUT 2
3
4
5
6
7
8
9
10
"
while read i; do n=$(( n + i )); done <<SUMMANDS_HEREDOC_INPUT
$SUMMANDS $SUMMANDS
SUMMANDS_INPUT SUMMANDS_HEREDOC_INPUT
echo $n echo $n
``` ```