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:
1) longest string of each pattern in column 2, ignore any sub-string, as the index;
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)
Hello gurus,
I have a database of possible primary signal strings
pp22
pt22dx
pp22dx
jty2234
Also I have a list of scrambled signals which has a shorter string and a longer string separated by // (double slash ). Always the shorter string of a scrambled signal will have the primary... (6 Replies)
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
with the NM_ in $2 of file1.
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 MOJAVE
glshadersource
GLSHADERSOURCE(3G) OpenGL 3.3 GLSHADERSOURCE(3G)NAME
glShaderSource - Replaces the source code in a shader object
C SPECIFICATION
void glShaderSource(GLuint shader, GLsizei count, const GLchar **string, const GLint *length);
PARAMETERS
shader
Specifies the handle of the shader object whose source code is to be replaced.
count
Specifies the number of elements in the string and length arrays.
string
Specifies an array of pointers to strings containing the source code to be loaded into the shader.
length
Specifies an array of string lengths.
DESCRIPTION
glShaderSource sets the source code in shader to the source code in the array of strings specified by string. Any source code previously
stored in the shader object is completely replaced. The number of strings in the array is specified by count. If length is NULL, each
string is assumed to be null terminated. If length is a value other than NULL, it points to an array containing a string length for each of
the corresponding elements of string. Each element in the length array may contain the length of the corresponding string (the null
character is not counted as part of the string length) or a value less than 0 to indicate that the string is null terminated. The source
code strings are not scanned or parsed at this time; they are simply copied into the specified shader object.
NOTES
OpenGL copies the shader source code strings when glShaderSource is called, so an application may free its copy of the source code strings
immediately after the function returns.
ERRORS
GL_INVALID_VALUE is generated if shader is not a value generated by OpenGL.
GL_INVALID_OPERATION is generated if shader is not a shader object.
GL_INVALID_VALUE is generated if count is less than 0.
ASSOCIATED GETS
glGetShader() with arguments shader and GL_SHADER_SOURCE_LENGTH
glGetShaderSource() with argument shader
glIsShader()
SEE ALSO
glCompileShader(), glCreateShader(), glDeleteShader()
COPYRIGHT
Copyright (C) 2003-2005 3Dlabs Inc. Ltd. 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/.
OpenGL 3.3 03/08/2011 GLSHADERSOURCE(3G)
01-14-2020
