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Add process subsititution

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Spencer Owen 2019-10-23 11:37:05 -06:00 committed by GitHub
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@ -2631,6 +2631,17 @@ A short way of using if/else. An example:
[[ $a = 1 ]] && b="yes, equal" || b="nope"
</b></details>
<details>
<summary>What does the following code do and when would you use it?
<code>diff <(ls /tmp) <(ls /var/tmp)</code>
</summary><br>
It is called 'process substitution'. It provides a way to pass the output of a command to another command when using a pipe <code>|</code> is not possible. It can be used when a command does not support <code>STDIN</code> or you need the output of multiple commands.
https://superuser.com/a/1060002/167769
</details>
## SQL
<a name="sql-beginner"></a>