Re: Read Every n elements from Array

well splice is destructive, you could alternatively use array slices:

print @arr[$idx..$idx+2]; 
$idx+=3;
[download]

print @arr[$idx++,$idx++,$idx++];

Cheers Rolf

Comment on Re: Read Every n elements from Array Select or Download Code

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Re^2: Read Every n elements from Array by ikegami (Patriarch) on Feb 17, 2011 at 22:38 UTC
In general, reading and writing to a variable in the same statement can lead to problems. It's not a problem here, but that's not obvious at a glance. For example, that code has undefined behaviour in C. My compiler happens to get it "wrong": `$ cat a.c #include <stdio.h> int main() { int i = 0; printf("%d %d %d\n", i++, i++, i++); return 0; } $ gcc -Wall -o a a.c && a a.c: In function ‘main’: a.c:5: warning: operation on ‘i’ may be undefined a.c:5: warning: operation on ‘i’ may be undefined 2 1 0` [download] It's simpler just to avoid the issue.	[reply] [d/l]

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Re^2: Read Every n elements from Array
by ikegami (Patriarch) on Feb 17, 2011 at 22:38 UTC

In general, reading and writing to a variable in the same statement can lead to problems. It's not a problem here, but that's not obvious at a glance. For example, that code has undefined behaviour in C. My compiler happens to get it "wrong":

$ cat a.c
#include <stdio.h>

int main() {
   int i = 0;
   printf("%d %d %d\n", i++, i++, i++);
   return 0;
}

$ gcc -Wall -o a a.c && a
a.c: In function ‘main’:
a.c:5: warning: operation on ‘i’ may be undefined
a.c:5: warning: operation on ‘i’ may be undefined
2 1 0
[download]

It's simpler just to avoid the issue.

[reply]
[d/l]