如何在Tcl中简洁地连接字符串？ [英] How to concisely concatenate strings in Tcl?

问题描述

我可以很容易地在Tcl中将两个变量foo和bar连接起来： $ {foo} $ {bar}。

但是，如果我不这样做不想将中间结果放入变量中，我如何轻松地将调用proc的结果连接起来？

这应该写成长手：

  set foo [myFoo $ arg] 
 set bar [myBar $ arg] 
设置结果 $ {foo} $ {bar} 
  

是否有某种方法可以创建结果而不引入临时变量foo和bar？ / p>

这样做对我而言是不正确的：

  concat [myFoo $ arg] [myBar $ arg] 
  

因为它在两个结果之间引入了一个空格（用于列表目的）

好像是'string concat'就是我想要的，但是在我的Tcl解释器版本中似乎没有。

 字符串concat [myFoo $ arg] [myBar $ arg] 
  

字符串concat写在这里：

• http://wiki.tcl.tk/16206

解决方案

您可以将命令嵌入双引号中，而无需使用临时变量：

 设置结果 [myFoo $ arg] [myBar $ arg] 
  

I can easily concatenate two variables, foo and bar, as follows in Tcl: "${foo}${bar}".

However, if I don't want to put an intermediate result into a variable, how can I easily concatenate the results of calling some proc?

Long hand this would be written:

set foo [myFoo $arg]
set bar [myBar $arg]
set result "${foo}${bar}"

Is there some way to create result without introducing the temporary variables foo and bar?

Doing this is incorrect for my purposes:

concat [myFoo $arg] [myBar $arg]

as it introduces a space between the two results (for list purposes) if one does not exist.

Seems like 'string concat' would be what I want, but it does not appear to be in my version of Tcl interpreter.

string concat [myFoo $arg] [myBar $arg]

String concat is written about here:

• http://wiki.tcl.tk/16206

解决方案

You can embed commands within a double-quoted string without the need for a temporary variable:

set result "[myFoo $arg][myBar $arg]"

这篇关于如何在Tcl中简洁地连接字符串？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！