使用Glob在TCL中复制多个文件 [英] Copying Multiple Files in TCL using glob

问题描述

我想使用tcl从一个文件夹复制所有文件。
这是我到目前为止编写的代码，但是它不起作用。有什么问题？

I want to copy all files from one folder using tcl. This is the code that I have written so far, but it does not work. What is the problem?

set files [glob -dir E:\Music *]
puts "Moving files"

foreach f { $files } {
    file copy $f E:\
}

推荐答案

我以前的假设是错误的，但是不幸的是，我没有注意到您在 $ files 。与C之类的语言（其中括号或花括号是句法结构的一部分）不同，花括号用于在Tcl中引用。在这种情况下， $ files 是 glob 找到的文件列表，而 {$ files} 是文字字符串 $ files。由于没有名为 $ files的文件，因此尝试复制该文件时会出错。

My earlier assumption was wrong, and I unfortunately didn't notice that you were using braces around $files. Unlike languages like C, where parentheses or braces are part of syntactic constructions, braces are used for quoting in Tcl. In this case, $files is the list of files found by glob, while { $files } is the literal string " $files ". Since there is no file named " $files ", you get an error when you try to copy it.

反斜杠字符仍然会出现问题。在解释器准备评估命令的阶段，任何反斜杠字符都将作为转义序列的一部分读取。将反斜杠字符更改为常规斜杠（ E：\ -> E：/ ）可以解决您的问题。您也可以像这样 E：\\ 或类似这样的 {E：/} 来引用它。在后一种情况下，花括号必须将整个字符串括起来，因此它将是 {E：\Music} 。

You are still going to have problems with the backslash character. During the phase when the interpreter prepares a command for evaluation, any backslash character is read as a part of an "escape sequence". Changing the backslash character to a regular slash (E:\ -> E:/) may solve your problem. You can also quote it like this E:\\ or like this {E:/}. In the latter case, the braces must enclose the whole string, so it would be {E:\Music}.

（注意：评论中提到的 Hoodecrow是我，我之前用过这个昵称。）

(Note: the 'Hoodiecrow' mentioned in the comments is me, I used that nick earlier.)

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