For your questions, why a[$1] didn't throw errors because if any variable is NOT initialized in awk and we are using it in any condition or etc then its value will be considered as NULL, hence NO ERRORS in it.
I am adding a detailed level of explanation here for my solution above:
Code:
awk ' ##Starting awk program from here.
BEGIN{ ##Starting BEGIN section of this awk code here.
FS=OFS="|" ##Setting FS and OFS as pipe here.
}
FNR==NR{ ##Checking condition if FNR==NR which will be TRUE when first time Input_file is being read.
b[$1]=length($3)>a[$1]?$3:b[$1] ##Creating array b with index $1 and checking if value of length of $3 is grater than value of a[$3] then keep value of length of $3 else keep OLD Value in it.
a[$1]=length($3)>a[$1]?length($3):a[$1] ##Creating array a with index $1 and checking condition if length of $3 is grater than a[$1] then save value as length($3) or keep the OLD value to it. This array a is basically has length in integer form value with index $1 to be used later in condition.
next ##next will skip all further statements from here,
}
length($3)<a[$1]{ ##Checking condition if length of 3rd field is lesser than value of array a with index $1 then
$3=b[$1] ##Setting current $3 to value of array b with index of $1 here.
}
1 ##1 will print edited/non-edited values of current line.
' Input_file Input_file ##Mentioning Input_file 2 times here.
These 2 Users Gave Thanks to RavinderSingh13 For This Post:
I will be performing a task on several directories, each containing a large number of files (2500+) that follow a regular naming convention:
YYYY_MM_DD_XX.foo_bar.A.B.some_different_stuff.EXT
What I would like to do is automatically discover the part of the filenames that are common to all... (1 Reply)
Hi!
I have a difficult problem, to step up a unknown version number in a text file, and save the file. It would be great to run script.sh and the version gets increased.
Example the content of the textfile.txt
hello
version = x
bye
This include three steps
1. First find the char after... (2 Replies)
Hello, I am using awk to match text in a tab separated field and am able to do so when matching the exact word. My problem is that I would like to match any sequence of text in the tab-separated field without having to match it all. Any help will be appreciated. Please see the code below.
awk... (3 Replies)
here is what i want to achieve... consider a file contains below contents. the file size is large about 60mb
cat dump.sql
INSERT INTO `table1` (`id`, `action`, `date`, `descrip`, `lastModified`) VALUES (1,'Change','2011-05-05 00:00:00','Account Updated','2012-02-10... (10 Replies)
I met a challenge to filter ~70 millions of sequence rows and I want using awk with conditions:
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2) all the unique patterns after 1);
3) print the whole row;
input:
1 ABCDEFGHI longest_sequence1
2 ABCDEFGH... (12 Replies)
Hi all !
I almost did it but got a small problem.
input:
cars red
cars blue
cars green
truck black
Wanted:
cars red-blue-green
truck black
Attempt:
gawk 'BEGIN{FS="\t"}{a = a (a?"-":"")$2; $2=a; print $1 FS $2}' input
But I also got the intermediate records... (2 Replies)
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I have a database of possible primary signal strings
pp22
pt22dx
pp22dx
jty2234
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In the awk below I am trying to set/update the value of $14 in file2 in
bold, using the matching NM_ in $12 or $9 in file2
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The lengths of $9 and $12 can be variable but what is consistent is the start pattern
will always be NM_ and the end pattern is always ;... (2 Replies)
Hi,
Wish to remove "DR-" from the string variable (var).
var="DR-SERVER1"
var=`echo $var | sed -e 's/DR-//g'`
echo "$var"
Expected Output:
However, I get the below error:
Can you please suggest. (4 Replies)
Discussion started by: mohtashims
4 Replies
LEARN ABOUT DEBIAN
glgetactivesubroutinename
GLGETACTIVESUBROUTIN(3G) [FIXME: manual] GLGETACTIVESUBROUTIN(3G)NAME
glGetActiveSubroutineName - query the name of an active shader subroutine
C SPECIFICATION
void glGetActiveSubroutineName(GLuint program, GLenum shadertype, GLuint index, GLsizei bufsize, GLsizei *length, GLchar *name);
PARAMETERS
program
Specifies the name of the program containing the subroutine.
shadertype
Specifies the shader stage from which to query the subroutine name.
index
Specifies the index of the shader subroutine uniform.
bufsize
Specifies the size of the buffer whose address is given in name.
length
Specifies the address of a variable which is to receive the length of the shader subroutine uniform name.
name
Specifies the address of an array into which the name of the shader subroutine uniform will be written.
DESCRIPTION
glGetActiveSubroutineName queries the name of an active shader subroutine uniform from the program object given in program. index
specifies the index of the shader subroutine uniform within the shader stage given by stage, and must between zero and the value of
GL_ACTIVE_SUBROUTINES minus one for the shader stage.
The name of the selected subroutine is returned as a null-terminated string in name. The actual number of characters written into name, not
including the null-terminator, is is returned in length. If length is NULL, no length is returned. The maximum number of characters that
may be written into name, including the null-terminator, is given in bufsize.
ERRORS
GL_INVALID_VALUE is generated if index is greater than or equal to the value of GL_ACTIVE_SUBROUTINES.
GL_INVALID_VALUE is generated if program is not the name of an existing program object.
ASSOCIATED GETS
glGetProgramStage() with argument GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH
SEE ALSO
glGetSubroutineIndex(), glGetActiveSubroutineUniform(), glGetProgramStage()
COPYRIGHT
Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication
License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.
[FIXME: source] 05/30/2012 GLGETACTIVESUBROUTIN(3G)
01-14-2020
