Monday, March 24, 2014

Perl: tell, seek

Perl: tell, seek


  • tell
  • seek
For our purposes a file is a line of characters. After a bunch of read and/or write operations we need to tell where are we on that line ?
 LOCATION = tell FILEHANDLE
 
We might also want to move within that file
 seek FILEHANDLE, OFFSET, WHENCE
 
 WHENCE:
     0 from beginning of file
     1 from current location
     2 from end of file
 OFFSET: 
     +/- number of bytes to move
 
the important values are:
seek $fh, 0,0;    # go to the beginning of the file
seek $fh, 0,2;    # go to the end of the file
 
 
--source: Edu Maven

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