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Shell Programming and Scripting
Help with removal of spaces between operators and operands
Post 302528429 by abk07 on Tuesday 7th of June 2011 05:56:20 AM
06-07-2011
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9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello,
I have a list of 'inputs' and i want to convert those on the second list named 'Desired Outputs', but i don't know how to do it?
Inputs Desired Outputs
1 2
94 4
276 8
369 10
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I am trying to understand
Does the following:
{tmp+=$10}
Mean take $10 and add them all up and call it tmp
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Hi,
I'm a newbie to shell scripting and I have the following problem:
I need all spaces between two letters or a letter and a number exchanged for an underscore, but all spaces between a letter and other characters need to remain. Searching forums didn't help...
One example for clarity:
... (3 Replies)
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I really don't know the meaning of these operators. Could someone explain the meanings so I can make my test for today?
<, <=, ==, !=, >=, >,
||, &&, ! ~ , !~
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I really don't know the meaning of these operators. Could someone explain the meanings?
<, <=, ==, !=, >=, >,
||, &&, ! ~ , !~
Thanks! (1 Reply)
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6. Shell Programming and Scripting
Hello..
I have a text file. I want to remove all the blank spaces(except tab) from the file..
I tried using sed command as shown below
sed 's/ //g' file1
But the problem with the above command is that it also eliminates 'tab' which is between the columns..
For example if the contents... (7 Replies)
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Hi everyone..
I'm trying to eliminate multiple whitespaces from a file..
I must make use of shell script to eliminate whitespaces..
Take a look at the sample file
1 int main()
2 {
3 int a,b;
4 printf("Enter the values of a and b");
5 scanf("%d%d",&a,&b);
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Hi
Lets say I have two arrays:
VAR_1 = "File_A" "File_B" "File_C" "File_D"
VAR_2 = "File_A" "File_D"
Is there a simple command to get the difference of these list, i.e.
VAR_1_2 = "File_B" "File_C"
or do I have to write a script and loop through all elements and compare them one by one?
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LEARN ABOUT FREEBSD
ppmtopgm
ppmtopgm(1) General Commands Manual ppmtopgm(1) NAME
ppmtopgm - convert a portable pixmap into a portable graymap SYNOPSIS
ppmtopgm [ppmfile] DESCRIPTION
Reads a portable pixmap as input. Produces a portable graymap as output. The output is a "black and white" rendering of the original image, as in a black and white photograph. The quantization formula used is .299 r + .587 g + .114 b. Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any ppm program can read pgm (and pbm ) files automatically. pgmtoppm is for colorizing a pgm file. Also, see ppmtorgb3 for a different way of converting color to gray. And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate the original colors, not necessarily a way that looks like a black and white photograph. QUOTE
Cold-hearted orb that rules the night Removes the colors from our sight Red is gray, and yellow white But we decide which is right And which is a quantization error. SEE ALSO
pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5) AUTHOR
Copyright (C) 1989 by Jef Poskanzer. 10 April 2000 ppmtopgm(1)