Echo batch file arrays using a variable for the index?

user_227664 0
Viewed 35208

If I have a batch file and I am setting arrays with an index that is a variable

@echo off
SET x=1
SET myVar[%x%]=happy

How do I echo that to get "happy" ?

I've tried

ECHO %myVar[%x%]%
ECHO %%myVar[%x%]%%
ECHO myVar[%x%]

But none of them work.

It works fine if I use the actual number for the index

ECHO %myVar[1]%

But not if the index number is also a variable

echo batch-file arrays
3 Answers
SET x=1
SET myVar[%x%]=happy

call echo %%myvar[%x%]%%
set myvar[%x%]
for /f "tokens=2* delims==" %%v in ('set myvar[%x%]')  do @echo %%v
setlocal enableDelayedExpansion
echo !myvar[%x%]!
endlocal

I would recommend you to use 

setlocal enableDelayedExpansion
echo !myvar[%x%]!
endlocal

as it is a best performing way

user_3883890

There is a special ! character in batch to deal with your situation. Use echo !myVar[%x%]!, from How to return an element of an array in Batch?. ! means delayed expansion. The variable myVar will not get expanded until after %x% is, yielding the expression you want.

user_29887300
Related