compare null with non-null Post: 302094983

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Null Value

Hello All, I have a file of the format **** 123 abc ABC 456 bcd BCD 789 def 112 ghi GHI 223 jkl 344 mno MNO **** I am trying to extract the lines that have no values in the third field (in this case, this would be 789 def 223 jkl Can anyone please help??...

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> /dev/null

hello all, In many shell scripts i found '> /dev/null' , i am not able to get this, will any one please explain why we are using this. thanks sudha

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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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/dev/null

Hi expert, May I know what is the difference between below cron tab entry ? 0,12 * * * * /abc/myscript.sh > /dev/null 2>&1 0,12 * * * * /abc/myscript.sh

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/dev/null what is the use of it?

when do you use the path /dev/null

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Insert string 'NULL' where there is a null value

I have an input file having 7 fields delimited by , eg : 1,ABC,hg,1,2,34,3 2,hj,YU,2,3,4, 3,JU,kl,4,5,7, 4,JK,KJ,3,56,4,5 The seventh field here in some lines is empty, whereas the other lines there is a value. How do I insert string NULL at this location (7th loc) for these lines where...

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/dev/null 2>&1 Versus /dev/null 2>1

How are these two different? They both prevent output and error from being displayed. I don't see the use of the "&" echo "hello" > /dev/null 2>&1 echo "hello" > /dev/null 2>1

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Check for null

Hi Champs!!! im a newbie in unix, need ur expert help for my problem... I need to search if there are any "NULL" entries in the string String without Null Str1: 203652|1000003653|tellt|RUPV|4649|1|07/28/2011 01:56:12 String with Null (RUPV is removed) Str2:...

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Redirecting standard out to /dev/null goes to file "/dev/null" instead

I apologize if this question has been answered else where or is too elementary. I ran across a KSH script (long unimportant story) that does this: if ; then CAS_SRC_LOG="/var/log/cas_src.log 2>&1" else CAS_SRC_LOG="/dev/null 2>&1" fithen does this: /usr/bin/echo "heartbeat:...

LEARN ABOUT CENTOS

xcreateic

XCreateIC(3)							  XLIB FUNCTIONS						      XCreateIC(3)

NAME

       XCreateIC, XDestroyIC, XIMOfIC - create, destroy, and obtain the input method of an input context

SYNTAX

       XIC XCreateIC(XIM im, ...);

       void XDestroyIC(XIC ic);

       XIM XIMOfIC(XIC ic);

ARGUMENTS

       ic	 Specifies the input context.

       im	 Specifies the input method.

       ...	 Specifies the variable length argument list to set XIC values.

DESCRIPTION

       The XCreateIC function creates a context within the specified input method.

       Some of the arguments are mandatory at creation time, and the input context will not be created if those arguments are not provided.  The
       mandatory arguments are the input style and the set of text callbacks (if the input style selected requires callbacks).	All other input
       context values can be set later.

       XCreateIC returns a NULL value if no input context could be created.  A NULL value could be returned for any of the following reasons:

       o    A required argument was not set.

       o    A read-only argument was set (for example, XNFilterEvents).

       o    The argument name is not recognized.

       o    The input method encountered an input method implementation-dependent error.

       The XCreateIC can generate BadAtom, BadColor, BadPixmap, and BadWindow errors.

       XDestroyIC destroys the specified input context.

       The XIMOfIC function returns the input method associated with the specified input context.

DIAGNOSTICS

       BadAtom	 A value for an Atom argument does not name a defined Atom.

       BadColor  A value for a Colormap argument does not name a defined Colormap.

       BadPixmap A value for a Pixmap argument does not name a defined Pixmap.

       BadWindow A value for a Window argument does not name a defined Window.

SEE ALSO

       XOpenIM(3), XSetICFocus(3), XSetICValues(3), XmbResetIC(3)
       Xlib - C Language X Interface

X Version 11							   libX11 1.6.0 						      XCreateIC(3)

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Null Value

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> /dev/null

Discussion started by: rrs

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How to compare null and space using single if condition

Discussion started by: jayakumarrt

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/dev/null

Discussion started by: olaris