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Re: comparison between system operators and Built in function

by serf (Chaplain)
on Jan 19, 2006 at 03:26 UTC ( #524116=note: print w/ replies, xml ) Need Help??


in reply to comparison between system operators and Built in function

Hi jesuashok where do you get "equivalent built in functions" between those two lists?

  • chdir
  • - Changes the working directory to EXPR - you can't do this with system("cd $dir"); or $ENV{PWD} = $dir; - chdir looks like a good option :o)
  • opendir
  • - Opens a directory named EXPR for processing by readdir, telldir, seekdir, rewinddir, and closedir. - what else could you use to do that?
  • readdir
  • - Returns the next directory entry for a directory opened by opendir. I guess you could fudge that up by using ls, but using readdir from within Perl is more simple and efficient.
  • closedir
  • - Closes a directory opened by opendir - how could you do that?
  • symlink
  • - sure, you could do system ("ln -s $orig $link"); but why complicate things, and why ask someone else to do something you can easily do yourself and then know the result straight away?
  • open
  • - there are many ways to read data out of file, using open within perl is certainly a good one. Using backticks and cat or something like that would not be likely to win you any "well done" prizes.
  • read
  • - Attempts to read LENGTH characters of data into variable SCALAR from the specified FILEHANDLE.
  • close
  • - Closes the file or pipe associated with the file handle - again, what are you proposing to do this with?


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