bluegroper
Technical User
$|++;
What does this instruction do in perl ?
I tried Mr Google, but its useless.
TIA's
What does this instruction do in perl ?
I tried Mr Google, but its useless.
TIA's
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What does this do ??
- Thread starter bluegroper
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It basically tells perl to print output after every print command instead of waiting to the end of the program. All of perls predefinded variables are explained in perlvar as ishnid said, you can google for that or read it on your local PC if you have perl installed.
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- Kevin, perl coder unexceptional!![[wiggle]](/data/assets/smilies/wiggle.gif "[wiggle] [wiggle]")
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- Kevin, perl coder unexceptional!
- Thread starter
- #4
bluegroper
Technical User
Many thx.
I hadn't realised that its a perlvar.
Cheers too.
$|
If set to nonzero, forces a flush right away and after every write or print on the currently selected output channel. Default is 0 (regardless of whether the channel is actually buffered by the system or not; $| tells you only whether you've asked Perl explicitly to flush after each write). Note that STDOUT will typically be line buffered if output is to the terminal and block buffered otherwise. Setting this variable is useful primarily when you are outputting to a pipe, such as when you are running a Perl script under rsh and want to see the output as it's happening. This has no effect on input buffering. (Mnemonic: when you want your pipes to be piping hot.)
I hadn't realised that its a perlvar.
Cheers too.
$|
If set to nonzero, forces a flush right away and after every write or print on the currently selected output channel. Default is 0 (regardless of whether the channel is actually buffered by the system or not; $| tells you only whether you've asked Perl explicitly to flush after each write). Note that STDOUT will typically be line buffered if output is to the terminal and block buffered otherwise. Setting this variable is useful primarily when you are outputting to a pipe, such as when you are running a Perl script under rsh and want to see the output as it's happening. This has no effect on input buffering. (Mnemonic: when you want your pipes to be piping hot.)
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