blocks|key|888975|text|通常，当我想在Bash中将参数传递给别名时，我会使用别名和如下所示函数的组合，例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|888976|function+__t2d+{++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++if+[+"$1x"+!=+'x'+];+then++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++date+-d+"@$1"+++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++fi+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
}+

alias+t2d='__t2d'+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++|code-block|syntax|javascript|888977|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Usually when I want to pass arguments to an alias in Bash, I use a combination of an alias and a function like this, for instance:

<pre><code>function __t2d { 
 if [ "$1x" != 'x' ]; then 
 date -d "@$1" 
 fi 
} 

alias t2d='__t2d' 
</code></pre>

blocks|key|1103910|text|别名将扩展为它表示的字符串。别名之后的任何内容都将在其展开后出现，而不需要或能够作为显式参数传递(例如$1)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1103911|$+alias+foo='/path/to/bar'
$+foo+some+args|code-block|syntax|javascript|1103912|将扩展为|1103913|$+/path/to/bar+some+args|1103914|如果要使用显式参数，则需要使用函数|1103915|$+foo+()+{+/path/to/bar+"$@"+fixed+args;+}
$+foo+abc+123|1103916|将被执行，就像您已经执行了|1103917|$+/path/to/bar+abc+123+fixed+args|1103918|要取消定义别名，请执行以下操作：|1103919|unalias+foo|1103920|要取消定义函数，请执行以下操作：|1103921|unset+-f+foo|1103922|要查看类型和定义(对于每个定义的别名、关键字、函数、内置文件或可执行文件)：|1103923|type+-a+foo|1103924|或者仅键入(对于出现优先级最高的情况)：|1103925|type+-t+foo|1103926|entityMap^0|1F|2|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1E|8|@$9|1F|A|1G|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|1H|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1I|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|1J|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1K|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|1L|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|1M|8|@]|D|@]|E|$]]|$1|U|3|V|5|H|7|1N|8|@]|D|@]|E|$I|J]]|$1|W|3|X|5|6|7|1O|8|@]|D|@]|E|$]]|$1|Y|3|Z|5|H|7|1P|8|@]|D|@]|E|$I|J]]|$1|10|3|11|5|6|7|1Q|8|@]|D|@]|E|$]]|$1|12|3|13|5|H|7|1R|8|@]|D|@]|E|$I|J]]|$1|14|3|15|5|6|7|1S|8|@]|D|@]|E|$]]|$1|16|3|17|5|H|7|1T|8|@]|D|@]|E|$I|J]]|$1|18|3|19|5|6|7|1U|8|@]|D|@]|E|$]]|$1|1A|3|1B|5|H|7|1V|8|@]|D|@]|E|$I|J]]|$1|1C|3|-4|5|6|7|1W|8|@]|D|@]|E|$]]]|1D|$]]

An alias will expand to the string it represents. Anything after the alias will appear after its expansion without needing to be or able to be passed as explicit arguments (e.g. <code>$1</code>).

<pre><code>$ alias foo='/path/to/bar'
$ foo some args
</code></pre>

will get expanded to

<pre><code>$ /path/to/bar some args
</code></pre>

If you want to use explicit arguments, you'll need to use a function

<pre><code>$ foo () { /path/to/bar "$@" fixed args; }
$ foo abc 123
</code></pre>

will be executed as if you had done

<pre><code>$ /path/to/bar abc 123 fixed args
</code></pre>

To undefine an alias:

<pre><code>unalias foo
</code></pre>

To undefine a function:

<pre><code>unset -f foo
</code></pre>

To see the type and definition (for each defined alias, keyword, function, builtin or executable file):

<pre><code>type -a foo
</code></pre>

Or type only (for the highest precedence occurrence):

<pre><code>type -t foo
</code></pre>

blocks|key|889075|text|为了简化leed25d的答案，可以组合使用别名和函数。例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|889076|function+__GetIt+{
++++cp+./path/to/stuff/$*+.
}

alias+GetIt='__GetIt'|code-block|syntax|javascript|889077|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

To simplify leed25d's answer, use a combination of an alias and a function. For example: 

<pre><code>function __GetIt {
 cp ./path/to/stuff/$* .
}

alias GetIt='__GetIt'
</code></pre>

blocks|key|889160|text|要在别名中使用参数，我使用以下方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|889161|alias+myalias='function+__myalias()+{+echo+"Hello+$*";+unset+-f+__myalias;+};+__myalias'|code-block|syntax|javascript|889162|它是一个封装在别名中的自毁函数，所以它是两全其美的，并且不会在你的定义中占用额外的一行……这是我讨厌的，哦，是的，如果你需要返回值，你必须在调用unset之前存储它，然后在自毁函数中使用"+return“关键字返回值：|889163|alias+myalias='function+__myalias()+{+echo+"Hello+$*";+myresult=$?;+unset+-f+__myalias;+return+$myresult;+};+__myalias'|889164|所以..。|889165|如果您需要在其中包含该变量，则可以|889166|alias+mongodb='function+__mongodb()+{+./path/to/mongodb/$1;+unset+-f+__mongodb;+};+__mongodb'|889167|当然..。|889168|alias+mongodb='./path/to/mongodb/'|889169|实际上，不需要参数也可以做同样的事情，但就像我说的，如果您出于某种原因想要或需要它们(例如，您需要$2而不是$1)，您将需要使用这样的包装器。如果它超过一行，你可能会考虑直接写一个函数，因为当它变得更大时，它会变得更难看。函数是很棒的，因为你得到了函数提供的所有好处(参见bash手册页中的补全、陷阱、绑定等)。|889170|我希望这对您有所帮助:)|889171|entityMap^0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|14|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|15|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|16|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|17|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|18|8|@]|9|@]|A|$E|F]]|$1|U|3|V|5|6|7|19|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1A|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|Z|$]]

to use parameters in aliases, i use this method:

<pre><code>alias myalias='function __myalias() { echo "Hello $*"; unset -f __myalias; }; __myalias'
</code></pre>

its a self-destructive function wrapped in an alias, so it pretty much is the best of both worlds, and doesnt take up an extra line(s) in your definitions... which i hate, oh yeah and if you need that return value, you'll have to store it before calling unset, and then return the value using the "return" keyword in that self destructive function there:

<pre><code>alias myalias='function __myalias() { echo "Hello $*"; myresult=$?; unset -f __myalias; return $myresult; }; __myalias'
</code></pre>

so..

you could, if you need to have that variable in there

<pre><code>alias mongodb='function __mongodb() { ./path/to/mongodb/$1; unset -f __mongodb; }; __mongodb'
</code></pre>

of course...

<pre><code>alias mongodb='./path/to/mongodb/'
</code></pre>

would actually do the same thing without the need for parameters, but like i said, if you wanted or needed them for some reason (for example, you needed $2 instead of $1), you would need to use a wrapper like that. If it is bigger than one line you might consider just writing a function outright since it would become more of an eyesore as it grew larger. Functions are great since you get all the perks that functions give (see completion, traps, bind, etc for the goodies that functions can provide, in the bash manpage).

I hope that helps you out :)

blocks|key|889252|text|这是可以避免使用函数的解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|889253|alias+addone='{+num=$(cat+-);+echo+"input:+$num";+echo+"result:$(($num%2B1))";+}<<<'|code-block|syntax|javascript|889254|测试结果|889255|addone+200
input:+200
result:201|889256|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

This is the solution which can avoid using function:

<pre><code>alias addone='{ num=$(cat -); echo "input: $num"; echo "result:$(($num+1))"; }&lt;&lt;&lt;'
</code></pre>

test result

<pre><code>addone 200
input: 200
result:201
</code></pre>

Is it possible to do the following:

I want to run the following:

<pre><code>mongodb bin/mongod
</code></pre>

In my bash_profile I have

<pre><code>alias = "./path/to/mongodb/$1"
</code></pre>

Passing argument to alias in bash

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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是否可以执行以下操作：我想运行以下命令：mongodb bin/mongod在我的bash_profile中alias = "./path/to/mongodb/$1"

问将参数传递给bash中的别名
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