Hi Duncan,
I did nothing between running the first two and the last two. The following
is the output:
> msg <- "old"
> delayedAssign("x", msg)
> msg <- "new!"
> x
[1] "new!"
> msg <- "old"
> delayedAssign("x", msg)
> msg <- "new!"
> x
[1] "old"
Thanks,
Gang
2013/8/16 Duncan Murdoch <murdoch.dun...@gmail.com>
> On 13-08-14 9:11 PM, Gang Peng wrote:
>
>> I run the examples in delayedAssign:
>>
>> msg <- "old"
>> delayedAssign("x", msg)
>> msg <- "new!"
>> x
>>
>> If I run these four commands together, x is "new". If I run the first two
>> commands first and then run the last two commands, x is "old".
>>
>> I just cannot figure out why.
>>
>
> You aren't telling us everything. What did you do in between running the
> first two and the last two? Presumably something you did forced the
> evaluation of x. That is what causes the behaviour you saw.
>
> Duncan Murdoch
>
>
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