Re^2: modify the contents of an array

~~No it won't. It will print the return values of those s///'s which happens to be 1.~~

Avoid using grep() (or map()) or `backticks` in a void context,
that is, when you just throw away their return values.  Those func-
tions all have return values, so use them.  Otherwise use a fore-
ach() loop or the system() function instead.
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Re^3: modify the contents of an array by Anonymous Monk on Sep 29, 2005 at 12:01 UTC
You would be right if prasadbabu had written: `@arr = map {s/^(\d{2})(\d{2})(\d{2})/$1\/$2\/$3/} @arr;` [download] But he didn't. He rightly ignored the return values of `s///` (if you write `s/^(\d{2})(\d{2})(\d{2})/$1\/$2\/$3/ for @arr`, you are ignoring the return value of `s///` just as much as when using map in void context), and went of the side effects of `s///` - the main feature of `s///`.	[reply] [d/l] [select]
Re^4: modify the contents of an array by blazar (Canon) on Sep 29, 2005 at 12:15 UTC
You're perfectly right. I overlooked that. Hence here are my partial apologies to prasadbabu. Partial, because map still isn't the best tool for that task.	[reply]
Re^5: modify the contents of an array by Anonymous Monk on Sep 29, 2005 at 12:54 UTC
Well, that depends on how you describe "best tool". If best tool means "fastest" or least resource sensitive, then perl isn't the best tool for the job, as it isn't as fast as C.	[reply]
Re^6: modify the contents of an array by Anonymous Monk on Sep 29, 2005 at 13:22 UTC
Re^6: modify the contents of an array by blazar (Canon) on Sep 29, 2005 at 13:06 UTC
Re^7: modify the contents of an array by Anonymous Monk on Sep 29, 2005 at 13:35 UTC
Some notes below your chosen depth have not been shown here
Re^3: modify the contents of an array by prasadbabu (Prior) on Sep 29, 2005 at 11:46 UTC
blazar you are absolutely right. But the above coding works for me, i tested and then only posted. Hereafter i try to avoid these kind of mistakes. Prasad	[reply]