我如何获得一个for循环用逗号分隔的字符串工作？ [英] How do I get a for loop to work with a comma delimited string?

问题描述

这是我的code迄今：

This is my code so far:

for /f "tokens=1 eol=," %%f IN ("1,2,3,4") do  (
    echo .
    echo %%f    
)

我期待的产生：

.
1
.
2
.

等等......

etc...

而是我得到：

.
1

就是这样。我在想什么？

And that's it. What am I missing?

推荐答案

您已经误解的选项。

• 标记= 1 意味着你只需要在每一行的第一个标记。你要全部上线的标记。


• EOL =，意味着你要跨preT逗号作为年初的行注释结束的。要使用 delims =，而不是指示逗号分隔符（而不是空白的默认值）。

• tokens=1 means you only want the first token on each line. You want all of the tokens on the line.
• eol=, means you want to interpret a comma as the beginning of an end of line comment. You want to use delims=, instead to indicate the comma is the delimiter (instead of the default value of whitespace).

FOR / F主要用于对文件中的流水线作业。你没有这样做。你在一个字符串操作，所以鲁本斯的回答是更接近你想要什么：

FOR /F is primarily for operating on lines in a file. You're not doing that. You're operating on a single string, so Rubens' answer is closer to what you want:

@ECHO OFF
SET test=1,2,3,4
FOR /D %%F IN (%test%) DO (
  ECHO .
  ECHO %%F
)

不过，从理论上讲，你应该可以这样说：

However, in theory, you should be able to say something like:

FOR /F "usebackq delims=, tokens=1-4" %%f IN ('1^,2^,3^,4') DO (
  ECHO .
  ECHO %%f    
  ECHO .
  ECHO %%g
  ECHO .
  ECHO %%h
  ECHO .
  ECHO %%i
)

本作品为好，但可能不会在扩展自己想要的方式。请注意，您必须使用逃脱^字符字符串中的逗号，你必须指定你想要的标记，然后用随后的变量％G，％H和％我得到他们。

This works as well, but probably doesn't scale in the way you want. Note that you have to escape the comma in the string using the ^ character, and you have to specify the tokens you want and then use the subsequent variables %g, %h and %i to get them.

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