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add variable

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get the first character of the variable
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onceupon 2018-04-12 14:23:32 +08:00 committed by GitHub
parent 283d52b361
commit 54a00b2569
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@ -838,9 +838,17 @@ var="some string"
echo ${#var}
# 11
```
##### get the first character of the variable
```bash
var="some string"
echo ${var%%"${var#?}"}
#s
```
##### replacement (e.g. remove the first leading 0 )
```bash
${var[@]#0}
var="0050"
echo ${var[@]#0}
#050
```
##### replacement (e.g. replace 'a' with ',')