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Top Forums Shell Programming and Scripting perl sum 2nd field in an array Post 302452067 by jimmy_y on Thursday 9th of September 2010 04:45:26 AM
Old 09-09-2010
perl sum 2nd field in an array

Hi Everyone,

Code:
($total+=$_) for @record;

assume @record=(1,2,3), so the result is 6.
if @record=("1 3","2 3","3 3"), would like to sum up the 2nd field of this array, the result is 9.
i tried " ($total+=$[2]) for @record ", cannot, please advice.

Thanks

---------- Post updated at 03:45 AM ---------- Previous update was at 03:38 AM ----------

err, i think i still use back the for loop to complete this task.
 

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script(1)							   User Commands							 script(1)

NAME
script - make record of a terminal session SYNOPSIS
script [-a] [filename] DESCRIPTION
The script utility makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the record is saved in the file typescript. See WARNINGS. The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends when the forked shell exits or when Control-d is typed. OPTIONS
The following option is supported: -a Appends the session record to filename, rather than overwriting it. NOTES
script places everything that appears on the screen in filename, including prompts. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |CSI |Enabled | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5) WARNINGS
script can pose a security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a privileged user, that is, root. Be sure that typescript is not a link before running script. SunOS 5.11 30 Jan 2004 script(1)
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