Programming :: Check If A Variable Holding A Character Is A Hyphen?

Mar 4, 2010

I am having trouble with the code below, I'm trying to check if a variable holding a character is a hyphen.

Code:

#!/bin/bash
$char="-"
if (( "$char" == "-" )); then

[code]....

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Programming :: Remove The Last Character From Variable

Jun 22, 2010

i have the following:

Quote:

echo %host%|sed "$s/.$//"

this would remove the Last character of the value assigned to the %host%. for example if my value is: abcd i get abc. but i am not able to assign the output. for example when i do

Quote:

set k=`echo %host%|sed "$s/.$//"`

after doing echo %k i get no output at the command prompt...!! whereas when i just type:

Quote:

echo abcd|sed "$s/.$//"

at the command prompt i get abc. maybe some other ways to Remove the Last character...?

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Programming :: Check Whether The First Character Is TAB Or Space?

May 11, 2011

I have a file with one line. I want to check whether the first character is TAB or space, how can i do this.? using "cut" wont as it "bypasses the tab and space characters"

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Jun 15, 2011

I need some software that will check .xml file and tell me which character is malformed in 'utf-8'. I am using perl for some parsing.

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Programming :: Check If The Variable Is A Number Or Not

Apr 30, 2011

I've created (as a homework) to create as many folders as told but I still need to check if the variable is a number or not :

Code: #!/bin/sh
echo "Veuillez saisir un nombre"; read nmbr
nmbrf=$nmbr
while [ $nmbrf -gt 0 ]
do mkdir -p "foo$nmbrf"
nmbrf=`expr $nmbrf - 1`
echo "$nmbrf"

how do I check that nmbr is a number or something else?

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Programming :: Check That The Same File Exists Within Two Different Directories Using A Filename As A Variable?

Apr 30, 2010

I am in need of a way to check that the same file exists within two different directories using a filename as a variable. Here is the process which requires it: The script is reaches out (via ftp) and pulls down a file(s) and delete it afterwards. This is halfhazard because in the instance it doesnt pull down the file, yet still deletes it, we are up a creek. I am looking to pull it down to a temp location and then verify that file exists in the location in which it needs to be present to process before deleting it, adding a little extra layer for security. The script itself is finished.If I put a file name in manually it works perfect. I just need a way to pump the filename into the variable.

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Programming :: Initialize Ksh Array When First Element Includes Hyphen?

Jul 19, 2011

I'm trying to create an array with variable including hyphenbut ksh refuses the first element

set -A allArgs
set +A allArgs ${allArgs[@]} -all
set +A allArgs ${allArgs[@]} -date

[code]...

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General :: Remove A Certain Character From A Variable?

Jun 15, 2010

I want to remove single quote from a variable. eg: Suppose I have a variable VAR='TEST' (including single quotes) How can I remove single quotes and make it TEST.

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Programming :: No While Loop Is AllowedThe Lecturer's Tip Was To Treat "-" As Negative And Not Hyphen?

Mar 25, 2010

I have a assignment relating to barcode reading.Let say i have to enter the 13 digit barcode with hyphen e.g "Enter barcode:123-46574-48847" using scanf.Once thats done how do i extract the values without the hyphene.g using printf "1234657448847". No arrays No strings and No function is allowed.No while loop is allowedThe lecturer's tip was to treat "-" as negative and not hyphen.

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General :: Special Character In String Variable And Grep

Apr 11, 2011

I want to match some filename in some text, but the filenames I have no control of, so "[" can "]" can appear in the filenames.so do I always have to use sed to addslashes to these variables before I have to grep them? and what other characters have I missed other than "[", "]", "."?

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General :: Use The Man / Info / Apropos Pages - Character Instructed The Shell To Interpret A Special Character As An Ordinary Character?

Mar 27, 2010

1.What character instructd the shell to interpret a special character as an ordinary character?

2.What directory contains some of the utilities available on the system in the form of binary files?

3. What command is used to search the location of a utility?

4. What command is used to instruct the editor to write the file and quit the editor?

5. What key quits the more utility and displays the shell prompt?

6. What command starts a child shell as the super user, taking on root's identity and environment?

7. Which wildcard characters can be used for searching all the files in the system that start with "A"?

8. The user name or login name of the super user is????

[Code]....

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Programming :: Bash - Read Content Of File To Variable And Use This Variable In For Loop ?

Aug 21, 2009

I'm trying to read content of file to variable and use this variable in for loop. The problem is, when I have c++ comment style in file - /*. Spaces in line are also interpreted as separated lines.

For example:

Code:

Changing $files to "$files" eliminate these problems but causes that whole content of variable is treated as one string (one execution of loop).

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General :: Check Character And Then Replace Depending On Result?

Oct 26, 2010

I have a CSV file with 8 columns. I want to check the 5th column, which will contain a single capitalised letter. If that letter is say "B" I would then like to replace the 2nd column in the csv with an incremental number starting at 0 (basically a count) with a prefix of B (B0000001) Sample row would be:

Code:

C, 0109390,sfs,sfsf,B,blah,blah

Amended row would be:

Code:

C, B000001,sfs,sfsf,B,blah,blah

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Programming :: Make A New Variable With The String From The Old Variable Btut Without Any Plus Sign?

Apr 7, 2010

my script has a variable which comes in the form +00.00 +0.00 -00.00 or -0.00 (the numbers can be any in that form) for any that have a + symbol I need to remove the +, but if it has a - symbol it needs to stay.

i need to make a new variable with the string from the old variable btut without any plus sign. I have tried a lot of different ways with no success, each thing I tried either left the + or removed the entire string. I think this should work but doesn't

foo=+12.40
bar=${foo#+}

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Programming :: Search Within A Variable And Assign The Results To A New Variable?

Apr 25, 2011

how I can search within a variable and assign the results to a new variable. I'll use the following as an example -

cars="Audi BMW Cadillac Chevy Dodge Ferrari Ford Mercedes"
list=`echo ${cars} | egrep -o '<A?+|<C+'`

with the echo command I get the following output assigned to list -

A
C
C

What I'd like to get for output is -

Audi
Cadillac
Chevy

how I could do this regardless of upper/lower case letters?

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Programming :: Assign Value Of C Variable To Shell Variable?

Apr 28, 2010

included shell script inside c program, and i wanted to assign the value of c variable to shell variable..Can any one please suggest me how to do it?

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Feb 2, 2010

I want a line or lines to check for variable length in my script. I just want to check if a variable the user inputted is 4 characters long, and if it isn't to return a false or exit status of 0.

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Programming :: Assignment To A Variable Variable?

Mar 17, 2011

This loop is part of a bash script which takes multiple arguments.

Code:
for ((i=1;i<=$number;++i)) ; do
offset=$(($i+5))

[code]...

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Aug 19, 2010

I want to put check menu & check list in utility dialog.i dont know how i do this

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Jun 27, 2010

I have a string like this "/home/test/filename.txt" and i want to delete all character after the last "/". how to do that using sed or awk.

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Programming :: Character Arrays In C?

Nov 3, 2010

I was reading Kernighan Ritchie book chapter 4 which deals with character pointers.I am not able to understand following different type of declarations

Code:
char aname[][15] = { "Illegal month", "Jan", "Feb", "Mar" };
char amessage[] = "now is the time";

[code]...

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Programming :: Get Value In Character String?

Oct 23, 2010

i am compiling the following program in linux. it's in c language. after the compilation with gcc when i run the executable file. it asks for input. but when i enter a name. i prints "Segmentation fault" and then terminate the program. can you please help me.

#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <unistd.h>

[code]....

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Programming :: Remove First And Last Character?

Feb 24, 2010

which is the simplest way to have first and last character cropped out from a string? Something simpler than

Code:

echo $STRING | cut -b 2- | rev | cut -b 2- | rev

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Programming :: Sed Substitute Everything Until Character?

Mar 30, 2010

I have the following file:

Code:

1 line
...
49 test test=AA:AA:AA:AA:AA=0

I need to substitute on the line number 49, all text until =. I have used the following, but with no actual result.

sed -re '49s/^.+=//' file
and
sed -e '49s/.*[=]//' file

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Dec 4, 2010

i want to pass variable in mysql qyery in c programming

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Programming :: Awk Character Position Matching?

Apr 22, 2011

I am trying to check if the 9th character in a file on each line is a v and if so, then print the first word. I've tried a number of variations and am stuck !If it's possible to also check if character position 1 begins with a s in the same awk, that would make it cleaner instead of using egrep.

egrep '^s' file | nawk '{virtual=substr($0,9,1); if ($virtual=="v") {printf "%s", $1}}'
nawk: illegal field $(e)
input record number 1
source line number 1

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Programming :: Best Way To Flush A Character Array

Aug 2, 2010

I believe I have unwanted ' characters left in a 9 element character array that are causing subsequent operations with it to fail. I see wildly differing views on the web on the proper way to flush 'em. It's clearly not as simple as it would appear at first sight. What's currently the best (or else "least deprecated") method?

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Programming :: Counting To A Specific Character?

Feb 12, 2010

I am loading variables for cXtXdXsX disk names into a script, and at present I have only accounted for there being 3 characters from c to t. I need to change it to a variable recognition so that it can count any number of charcters such as c1t , c10t , or c100t.

I can then take that information and use it with the following string to strip off the lead characters so as to make the 3 in $substr either a variable or redirect to multiple occurrences of raw based on the count returned.

sub raw {
$substr = substr ($_, 3);
$raw1 = substr ($substr, 0, -4);
$raw = lc($raw1);
}

how to count from the c to the t inclusive so I get 3, 4, 5, etc ...

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Programming :: Replace The Last Character String?

Jan 19, 2011

how to replace last character string. For example

$>export T1=abcde
$>export T2=xyz

how to get result abcdxyz?

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Programming :: Insert A Character In Line Using Sed/awk?

Jul 25, 2011

I have a string as below

LogFormat "%h %l %u %t "%r" %>s %b "%{Referer}i" "%{User-Agent}i"" combined

Want the above string to be modified as

LogFormat "%h %l %u %D %t "%r" %>s %b "%{Referer}i" "%{User-Agent}i"" combined

inserting %D after %u in the string

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