06-22-2008
They are the same, but sometimes you need to use the first syntax or even a space character ' ' instead of '[[:space:]]' if your sed/grep versions doesn't support such notation.
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1. Shell Programming and Scripting
Any idea please:
How to pass a reg. exp. variable to awk call in a shell???
Thank u
#!/bin/sh
reg_exp=name
awk '/reg_exp/{
print;
}' $1 (5 Replies)
Discussion started by: andy2000
5 Replies
2. Shell Programming and Scripting
in shell scripting there is extensive usage of
i> regular expression
ii>sed
iii>awk
can anyone tell me the suitable contexts ...i mean which one is suitable for what kind of operation.
like the reg-exp and sed seems to be doing the same job..i.e pattern matching (1 Reply)
Discussion started by: mobydick
1 Replies
3. Shell Programming and Scripting
$ cat file.txt
asd
<AA>dev
<LL>def
<RR>sha
This works for me:
$ sed -r 's/^ .*<LL>def/\t<LL>my/' file.txt
asd
<AA>dev
<LL>my
<RR>sha
But, this does not work for me:
$ sed -r 's/^\s+<LL>def/\t<LL>my/' file.txt
asd
... (1 Reply)
Discussion started by: demoprog
1 Replies
4. Shell Programming and Scripting
Hi All,
If I had a string that was a combination of plain text and quoted text - For ex
String: This "sentence is" a combination of "multiple words"
I wanted to know how I can write a reg-ex that splits the above string into the following
result = This
result = sentence is
result = a... (7 Replies)
Discussion started by: garric
7 Replies
5. UNIX for Dummies Questions & Answers
Hi, I need
to make some extraction . with the following input to get the right output.
input: /etc/exp/home/bin ====> output: exp
and
input: aex1234 ===> output: ex
Thanks for your help, (4 Replies)
Discussion started by: yeclota
4 Replies
6. Shell Programming and Scripting
Hi,
I am using the following piece of code for extracting some data from in between some tags ...
$text =~ /<TAG1>(.*)<\/TAG1>.*<TAG2>(.*)<\/TAG2>.*<TAG3>(.*)<\/TAG4>.*<TAG5>(.*)<\/TAG5>/;
$tag1=$1;
print "\n$tag1";
But I am getting an error like
Use of uninitialized value in... (1 Reply)
Discussion started by: King Nothing
1 Replies
7. Shell Programming and Scripting
$var1="LEN";
$VAR2="CODLENTT";
now, var2 contains var1(LEN).How do i check this in perl....
whether one string is a part of another..?
if (<logic>)
{
my operation;
}
what'd be the logic.. (4 Replies)
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Respected All,
I have a very big xml in that i want to search only below 3 lines.
<target name ="UpgradePrimaryBox" depends ="configureBox1">
<echo> Finished Upgrading Primary Box </echo>
</target>
grep -i "<target.*UpgradePrimaryBox" this gives me the first line.
then i need to match... (7 Replies)
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9. Shell Programming and Scripting
Hi All
I am a new in scripting language and I would like help for you guys
I would like to create a file named constant.h and search into all files *.m in specific directory for a reg-exp @"LBL_]+" exp: @"LBL_75847" , and write those matchs to constant.h if there are not written (no... (15 Replies)
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Since I cannot find a ffmpeg build that will automatically include a environment variable for the CMD ffmpeg command I'll probably have to do it myself.
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C:\RESOURCE\FFMPEG\ffmpeg.exe
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frexp(3M) Mathematical Library Functions frexp(3M)
NAME
frexp, frexpf, frexpl - extract mantissa and exponent from a floating-point number
SYNOPSIS
cc [ flag... ] file... -lm [ library... ]
#include <math.h>
double frexp(double num, int *exp);
float frexpf(float num, int *exp);
long double frexpl(long double num, int *exp);
DESCRIPTION
These functions break a floating-point number into a normalized fraction and an integral power of 2. They store the integer exponent in the
int object pointed to by exp.
RETURN VALUES
For finite arguments, these functions return the value x, such that x is a double with magnitude in the interval [1/2, 1) or 0, and num
equals x times 2 raised to the power *exp.
If num is NaN, NaN is returned and the value of *exp is unspecified.
If num is +- 0, +- 0 is returned and the value of *exp is 0.
If num is +-Inf, num is returned and the value of *exp is unspecified.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
isnan(3M), ldexp(3M), modf(3M), attributes(5), standards(5)
SunOS 5.10 16 Aug 2004 frexp(3M)