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Operating Systems Linux Fedora Shell Script - awk, begin, for and print Post 302848973 by agriz on Friday 30th of August 2013 01:57:50 PM
Old 08-30-2013
Shell Script - awk, begin, for and print

Code:
pointsb=`awk -v a2="$a2" -v b2="$b2" -v c2="$c2" -v yb="$yb" -v yc="$yc" \
	'BEGIN { for (y=yc; y<=yb; y++) { x = a2*y*y+b2*y+c2; print x, y }; }'`

I am learning shell script. I was reading a script and got confused in this line.
I understood that awk is allowing to assign the variable.

But I don't know how this line working.
Can anyone explain it, please?
 

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Test::use::ok(3)					User Contributed Perl Documentation					  Test::use::ok(3)

NAME
Test::use::ok - Alternative to Test::More::use_ok SYNOPSIS
use ok 'Some::Module'; DESCRIPTION
According to the Test::More documentation, it is recommended to run "use_ok()" inside a "BEGIN" block, so functions are exported at compile-time and prototypes are properly honored. That is, instead of writing this: use_ok( 'Some::Module' ); use_ok( 'Other::Module' ); One should write this: BEGIN { use_ok( 'Some::Module' ); } BEGIN { use_ok( 'Other::Module' ); } However, people often either forget to add "BEGIN", or mistakenly group "use_ok" with other tests in a single "BEGIN" block, which can create subtle differences in execution order. With this module, simply change all "use_ok" in test scripts to "use ok", and they will be executed at "BEGIN" time. The explicit space after "use" makes it clear that this is a single compile-time action. SEE ALSO
Test::More CC0 1.0 Universal To the extent possible under law, XX has waived all copyright and related or neighboring rights to Test-use-ok. This work is published from Taiwan. <http://creativecommons.org/publicdomain/zero/1.0> POD ERRORS
Hey! The above document had some coding errors, which are explained below: Around line 45: Non-ASCII character seen before =encoding in 'XX'. Assuming UTF-8 perl v5.18.2 2012-09-11 Test::use::ok(3)
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