Checking for null condition in a UNIX variable Post: 302827921

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Dear all That's another problem from me, i wanna do a lot of if statement checking for correct input by user, will be prompt input again if the input not meet the requirement defined by If or while statement... like this one .... while I know it's less effiency write the program...

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How can find Null value in If condition

Hi, i wrote If Conditions in my script, it's returns null and some values. but i am unable to find when Null value getting. bec we need modification according null vales. pls help me on this.

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How to compare null and space using single if condition

Hi I have a input file with many fields and each filed will be with in double quotes(""). i want to check fields contains balnk,null or space using condition using if. when i write code as below for if condition its not working a=`awk -F ',' '{gsub("\"", "", $1);'NF==0';printf $1}'...

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Checking for null value

Dear All, I'm glad that I've also joined in this forum. Good work fellas... :b: Keep going...! :) I am having a .csv file where I am reading the values with comma(,) as delimiter. After reading each and every values, I would like to check whether it is empty (say null or blank spaces). How...

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C++ segmentation fault while checking for null pointer

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Checking an array for NULL in C++

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NULL checking

Hi I need to check the output of a string to null. For eg the output I get for $KIT is empty. So want to echo something when the output is empty. How can I do that? Thanks in advance

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Checking the variable in UNIX

Hi, I have a file abc.txt as ABC,TYU,1.2566 AHG,GJJ,1.898 hgh,FGA,1.854 My program is reading each line and storing the values variables base_cy, quo_cy, ra_amt Need to validate each of them as in: base_cy and quo_cy should be a 3 character alphabet among A-Z, if it is lower case ...

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Condition checking in UNIX

i have a script where i have to find the age of a file, if then echo "dnb file is present for the monthly load" >> $RUNLOG dnb="1" else echo "dnb file has not arrived yet" > $ERRLOG dnb="0" fi i know the file is available so...

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If condition to check null variable

Guys, Please help me on the below sample.cfg var=NULL sample.sh #!/bin/sh . /sample.cfg if ;then 1 st command here else 2 nd command here fi

LEARN ABOUT DEBIAN

data::stream::bulk::dbi

Data::Stream::Bulk::DBI(3pm)				User Contributed Perl Documentation			      Data::Stream::Bulk::DBI(3pm)

NAME

       Data::Stream::Bulk::DBI - N-at-a-time iteration of DBI statement results.

VERSION

       version 0.11

SYNOPSIS

	       use Data::Stream::Bulk::DBI;

	       my $sth = $dbh->prepare("SELECT hate FROM sql"); # very big resultset
	       $sth->execute;

	       return Data::Stream::Bulk::DBI->new(
		       sth => $sth,
		       max_rows => $n, # how many at a time
		       slice => [ ... ], # if you want to pass the first param to fetchall_arrayref
	       );

DESCRIPTION

       This implementation of Data::Stream::Bulk api works with DBI statement handles, using "fetchall_arrayref" in DBI.

       It fetches "max_rows" at a time (defaults to 500).

ATTRIBUTES

       sth The statement handle to call "fetchall_arrayref" on.

       slice
	   Passed verbatim as the first param to "fetchall_arrayref". Should usually be "undef", provided for completetness.

       max_rows
	   The second param to "fetchall_arrayref". Controls the size of each buffer.

	   Defaults to 500.

METHODS

       get_more
	   See Data::Stream::Bulk::DoneFlag.

	   Calls "fetchall_arrayref" to get the next chunk of rows.

       all Calls "fetchall_arrayref" to get the raminder of the data (without specifying "max_rows").

AUTHOR

       Yuval Kogman <nothingmuch@woobling.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2012 by Yuval Kogman.

       This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

perl v5.14.2							    2012-02-14					      Data::Stream::Bulk::DBI(3pm)

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