如何在批處理中將變量拆分爲數組

Question

我試圖在批處理中編寫文本冒險，所以我想知道如何拆分變量，如set userinput = take book並將其變爲數組。我希望能夠編寫一個將字符串拆分爲數組項的程序。我用很多其他語言做了這個。還有其他幾個這樣的問題，但我不覺得他們回答我的問題。

Answer 1

這個任務可能比你意識到的要困難得多。有很多「簡單」的方法，但沒有一個簡單的方法是健壯的。

例如，一個簡單的FOR循環可以解析出單個標記，但它將被打破*,?，並可能"。

一個強大的解決方案需要大量的代碼。

這裏是我的解決方案，廣泛徵求意見：

@echo off 

:: Start out with delayed expansion disabled, and define "user input" 
:: I intentionally include "problem" characters 
setlocal disableDelayedExpansion 
set "userinput=take book! & ;MustPreserve EmptyLinesAreIgnored" 

:: Initialize count 
set "cnt=0" 

:: Enable and use delayed expansion to protect against poison characters 
setlocal enableDelayedExpansion 

:: Substitute <LineFeed> for each <space> 
(set parsed=!userinput: =^ 
%= Do not remove or alter this line =% 
!) 

:: Iterate each line, setting delims and eol to <space> to preserve all tokens 
for /f "eol= delims= " %%A in ("!parsed!") do (

    %= Return to delayed expansion disabled on first iteration, else ! is lost =% 
    if "!" equ "" endlocal 

    %= Increment the count =% 
    set /a cnt+=1 

    %= Temporarily enable delayed expansion to capture current count in FOR variable =% 
    setlocal enableDelayedExpansion 
    for %%N in (!cnt!) do (
    endlocal 

    %= Save the array value =% 
    set "token.%%N=%%A" 
) 
) 

::Print the results. Safe array access requires delayed expansion 
setlocal enableDelayedExpansion 
for /l %%N in (1 1 !cnt!) do echo token.%%N=!token.%%N! 

它看起來沒有所有的評論

@echo off 
setlocal disableDelayedExpansion 
set "userinput=take book! & :MustPreserveColon ;MustPreserve EmptyLinesAreIgnored" 

set "cnt=0" 
setlocal enableDelayedExpansion 
(set parsed=!userinput: =^ 
%= Do not remove or alter this line =% 
!) 
for /f "eol= delims= " %%A in ("!parsed!") do (
    if "!" equ "" endlocal 
    set /a cnt+=1 
    setlocal enableDelayedExpansion 
    for %%N in (!cnt!) do (
    endlocal 
    set "token.%%N=%%A" 
) 
) 

setlocal enableDelayedExpansion 
for /l %%N in (1 1 !cnt!) do echo token.%%N=!token.%%N! 

這裏好一點的輸出：

token.1=take 
token.2=book! 
token.3=& 
token.4=;MustPreserve 
token.5=EmptyLinesAreIgnored