参数数目可变的csh别名 [英] csh alias with variable number of arguments

问题描述

我想创建一个csh别名，如果不带参数调用，则执行一个操作，如果带单个参数调用，则执行第二个操作.有谁知道如何做到这一点? (尝试引用未传递的参数会触发错误).

I would like to create a csh alias that performs one operation if invoked without arguments and a second operation if invoked with a single argument. Does anyone know how to do this? (Attempting to refer to an argument that wasn't passed triggers an error).

推荐答案

我知道这有点晚了，但是我遇到了类似的问题，希望它可能仍然与某人有关.

I know this is a bit late but I just ran into needing something similar and hope it might still be relevant to somebody.

您可以将参数设置为数组，并根据数组的大小进行查询:

You can set the arguments as an array and query based on the size of the array:

alias testing 'set args_=(\!*); if ($#args_ > 0)  echo "this command has $#args_ arguments" endif'

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