Is it possible to combine a regular expression with a aritmetical expression? For example, taking a 8-numbers caracter sequece and casting each output of a grep, comparing to a constant.
THX! (2 Replies)
I have a file with data that looks like -
record nullable { final_delim=end ,delim="~%%~" ,quote=none }
(
1_UPC:string;
2_QUANTITY:string;
)
I want to fetch the first column that starts with integer. e.g - 1_UPC, 2_QUANTITY.
I tried "awk -F ":" -v var1="^0-9" '$1==var1' inschemafile".... (2 Replies)
What does the regular expression +~).*'] mean while using it with regexec.When the string "RCHNUSNT35C~rs07/ASM-RS07" is used with the regular expression +~).*'] regexec gives an error. I know what regexec does,but i do not understand what this expression means wrt to this string...
any help... (2 Replies)
I currently list and sort all the files in a directory which begin with an Upper Case C and end with the extension '#finished#'.
Here is the command I use:
ls -tr $currentDir/*.#finished#
what i need to do now is list all the files in a directory that begin with upper case C and end... (3 Replies)
CA_RELEASE has a value of 6. I need to check if that this is a numeric value. if not error.
source $CA_VERSION_DATA
if * ]
then
echo "CA_RELESE $CA_RELEASE is invalid"
exit -1
fi
+ source /etc/ncgl/ca_version_data
++ CA_PRODUCT_ID=samxts
++ CA_RELEASE=6
++ CA_WEEK_NO=7
++... (3 Replies)
I have a flat tab delimited file of the following format
1 A:23 A:45 A:789
2 A:2 A:47
3 A:78 A:345 A:9 A:10
4 A:34 A:98
I want to modify the file to the following format with insertions of "//" in between
1 A:23 // A:45 // A:789
2 A:2 // A:47
3 A:78 // A:345 // A:9 // A:10
4 A:34... (7 Replies)
Hi all,
How am I read a file, find the match regular expression and overwrite to the same files.
open DESTINATION_FILE, "<tmptravl.dat" or die "tmptravl.dat";
open NEW_DESTINATION_FILE, ">new_tmptravl.dat" or die "new_tmptravl.dat";
while (<DESTINATION_FILE>)
{
# print... (1 Reply)
Hello All,
I'm trying to extract the lines between two consecutive elements of an array from a file.
My array looks like:
problem_arr=(PRS111 PRS213 PRS234)
j=0
while } ]
do
k=`expr $j + 1`
sed -n "/${problem_arr}/,/${problem_arr}/p" problemid.txt
---some operation goes... (11 Replies)
Discussion started by: InduInduIndu
11 Replies
LEARN ABOUT DEBIAN
funcombine
funcombine(7) SAORD Documentation funcombine(7)NAME
FunCombine - Combining Region and Table Filters
SYNOPSIS
This document discusses the conventions for combining region and table filters, especially with regards to the comma operator.
DESCRIPTION
Comma Conventions
Filter specifications consist of a series of boolean expressions, separated by commas. These expressions can be table filters, spatial
region filters, or combinations thereof. Unfortunately, common usage requires that the comma operator must act differently in different
situations. Therefore, while its use is intuitive in most cases, commas can be a source of confusion.
According to long-standing usage in IRAF, when a comma separates two table filters, it takes on the meaning of a boolean and. Thus:
foo.fits[pha==1,pi==2]
is equivalent to:
foo.fits[pha==1 && pi==2]
When a comma separates two spatial region filters, however, it has traditionally taken on the meaning of a boolean or. Thus:
foo.fits[circle(10,10,3),ellipse(20,20,8,5)]
is equivalent to:
foo.fits[circle(10,10,3) || ellipse(20,20,8,5)]
(except that in the former case, each region is given a unique id in programs such as funcnts).
Region and table filters can be combined:
foo.fits[circle(10,10,3),pi=1:5]
or even:
foo.fits[pha==1&&circle(10,10,3),pi==2&&ellipse(20,20,8,5)]
In these cases, it is not obvious whether the command should utilize an or or and operator. We therefore arbitrarily chose to implement the
following rule:
o if both expressions contain a region, the operator used is or.
o if one (or both) expression(s) does not contain a region, the operator used is and.
This rule handles the cases of pure regions and pure column filters properly. It unambiguously assigns the boolean and to all mixed cases.
Thus:
foo.fits[circle(10,10,3),pi=1:5]
and
foo.fits[pi=1:5,circle(10,10,3)]
both are equivalent to:
foo.fits[circle(10,10,3) && pi=1:5]
[NB: This arbitrary rule replaces the previous arbitrary rule (pre-funtools 1.2.3) which stated:
o if the 2nd expression contains a region, the operator used is or.
o if the 2nd expression does not contain a region, the operator used is and.
In that scenario, the or operator was implied by:
pha==4,circle 5 5 1
while the and operator was implied by
circle 5 5 1,pha==4
Experience showed that this non-commutative treatment of the comma operator was confusing and led to unexpected results.]
The comma rule must be considered provisional: comments and complaints are welcome to help clarify the matter. Better still, we recommend
that the comma operator be avoided in such cases in favor of an explicit boolean operator.
SEE ALSO
See funtools(7) for a list of Funtools help pages
version 1.4.2 January 2, 2008 funcombine(7)