Closures/Value capture: Difference between revisions
Content added Content deleted
| Line 1,645: | Line 1,645: | ||
As shown, each instance increments separately. |
As shown, each instance increments separately. |
||
<b>--- Edit ---</b> |
|||
I think that modifying the bound variable can be done in a simpler way. |
|||
Instead of: |
|||
<lang R> evalq (x <- x + 1, parent.env(environment()))</lang> |
|||
substitute: |
|||
<lang R> x <<- x + 1</lang> |
|||
Testing: |
|||
<pre> |
|||
> s[[5]]() |
|||
[1] 25 |
|||
> s[[5]]() |
|||
[1] 36 |
|||
> s[[5]]() |
|||
[1] 49 |
|||
> s[[2]]() |
|||
[1] 4 |
|||
> s[[2]]() |
|||
[1] 9 |
|||
> s[[2]]() |
|||
[1] 16 |
|||
</pre> |
|||
=={{header|Racket}}== |
=={{header|Racket}}== |
||