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Update last article based on user comments

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timvisee 2021-03-03 00:02:20 +01:00
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content/blog/2021-03-02_elegant-bash-conditionals/index.md
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@ -158,12 +158,19 @@ it is empty, so you won't even need conditionals.
Most other shells support similar operators. [fish][fish] uses `; and` and `;
or`, but now [supports][fish-and-and] `&&` and `||` as well in modern versions.
`$_` (or `Alt+.`) is your last used argument (thanks [@Diti](https://lobste.rs/s/nao13f/elegant_bash_conditionals#c_brp038)). For example:
`$_` (or `Alt+.`) is your last used argument (noted by [@Diti](https://lobste.rs/s/nao13f/elegant_bash_conditionals#c_brp038)).
For example:
```bash
test -f FILE && source $_ || echo "FILE does not exist" >&2
test -f "FILE" && source "$_" || echo "$_ does not exist" >&2
```
A function or script returns the exit code of the last expression. If your last
expression is a command chain as described in this article, you might have an
unexpected exit code. See
[this](https://www.reddit.com/r/linux/comments/lw0ofg/elegant_bash_conditionals/gpf1lr0/)
comments.
## Closing thoughts
These command sequences with control operators are an elegant alternative for
simple if-statements. I think they look much better and are more expressive