从 Windows 命令行 bat 文件循环遍历字符串值
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Looping through string values from a windows command line bat file
提问by David
I am trying to create a batch script for my Windows machine that loops through a list of (string/decimal) values and uses each value as a parameter inside the loop.
我正在尝试为我的 Windows 机器创建一个批处理脚本，该脚本循环遍历（字符串/十进制）值列表并将每个值用作循环内的参数。
Below is an example of a simple for loop I would like to use to display all the different version files (from my list)
下面是一个简单的 for 循环示例，我想用它来显示所有不同的版本文件（来自我的列表）
FOR ? in ('1.1','1.2','2.4','3.9') do echo V[value_from_for_loop].txt
I am having trouble in how to loop through each item and use a variable in my echo statement.
我在如何遍历每个项目并在我的 echo 语句中使用变量时遇到了麻烦。
回答by Joey
for %x in (1.1 1.2 2.4 3.9) do echo V%x.txt
For use in a batch file you'll have to double the %:
要在批处理文件中使用，您必须将以下内容加倍%：
for %%x in (1.1 1.2 2.4 3.9) do echo V%%x.txt
回答by David
@?οеу's answer works great,
@?οе他们的回答很好用，
here is how I've used it, to 'walk' a pre-set list of files in a specific order.
这是我如何使用它，以特定顺序“遍历”预设的文件列表。
@echo off
for %%x in (
a.js
storage.js
logic.js
main.js
z.js
) do (
echo your file name is %%x
echo "%%x" is a cool name
echo.
echo =-=-=-=-=-=
echo.
)
the reason it looks like a vertical list is so it will be easier to add or remove more items. (and 'echo' with 'dot' is for one empty line).
它看起来像一个垂直列表的原因是，添加或删除更多项目会更容易。（“回声”与“点”是一个空行）。
the output will look like this:
输出将如下所示：
C:\example>yourBatchName.cmd
your file name is a.js
"a.js" is a cool name
=-=-=-=-=-=
your file name is storage.js
"storage.js" is a cool name
=-=-=-=-=-=
your file name is logic.js
"logic.js" is a cool name
=-=-=-=-=-=
your file name is main.js
"main.js" is a cool name
=-=-=-=-=-=
your file name is z.js
"z.js" is a cool name
=-=-=-=-=-=
** p.s. for file name listing one should prefer using something like this:
** 用于文件名列表的 ps 应该更喜欢使用这样的东西：
for %%e in (*.dll) do (....
for %%e in (*.dll) do (....
回答by Kurt Pfeifle
Assume you have a very long list of values which will be very uncomfortable to type on the commandline. Also, there is a length limit for the DOS command line.
假设你有一个很长的值列表，在命令行上输入会很不舒服。此外，DOS 命令行也有长度限制。
In this case the values may be stored in an arbitrarily long file, one per line. Call it my-values.list, with a content similar to:
在这种情况下，值可以存储在任意长的文件中，每行一个。调用它my-values.list，内容类似于：
1.1
1.2
2.4
3.9
3.9.1
3.9.2
3.91
3.91.1
...
Now you could read the variables from this text file, line by line:
现在您可以从该文本文件中逐行读取变量：
for /f "tokens=*" %a in (c:\path\to\my-values.list) do echo. Version%~nxa.txt
回答by Ted O'Connor
It won't let me comment, but I wanted to add my 2 cents worth here. The ' do ' has to be on the same line as the right parenthesis of the 'for' command. In other words, this will work:
它不会让我发表评论，但我想在这里添加我的 2 美分。“do”必须与“for”命令的右括号在同一行。换句话说，这将起作用：
for %x in (1.1 1.2 2.4 3.9) do echo V%x.txt
...but this will not:
...但这不会：
for %x in (1.1 1.2 2.4 3.9)
do echo V%x.txt
回答by mwpowellhtx
Something like this, I believe:
像这样的事情，我相信：
for %x in (1.1 1.2 2.4 3.9) do (
echo V%x.txt
)
