While each of Don Cragun's arguments holds true, just for the exercise I'm trying to infer the logics from your first post: field 4 is the link that glues together two records, of which field 2 is filled with "none1111" if the system did not have the correct value yet by the time of file creation. Both records need to be included at their original location in the file, and "none1111" needs to be replaced by the correct value found later in the same file for field 4. I'm sure there will be much more elegant solutions, but, as you are grepping several times, so do I. We need to run through the input file at least three times - a) to find the field 4 values, b) to find the field 2 values, and c) to replace. Step b) will be repeated for every pattern occurrence in the ifile. Here we go:
Code:
grep none1111 infile |
{ IFS=","; while read a b c d; do grep $d infile |
{ while read e f g h; do [ $f != 'none1111' ] &&
echo s/none1111\\\(.*$h\\\)/$f\\1/ >>sedfile; done;
}; done
}; sed -f sedfile infile; rm sedfile
Well, this one would remove the problem of repeated grep runs using xargs (whose known problem hopefully won't hit us in this case):
Code:
grep none1111 infile |
{ IFS=","; while read a b c d; do echo -n $d"|"; done; echo "#"; } |
xargs -I xy grep -E "xy" infile |
{ IFS=","; while read e f g h; do [ $f != 'none1111' ] && echo s/none1111\\\(.*$h\\\)/$f\\1/ >>sedfile; done; }
sed -f sedfile infile; rm sedfile
And, finally, a "oneliner" in which all parameters for sed are being created in a command substitution:
Hi gurus
I am not a C programmer but I need to read and write files on a computer on LAN using IP address.
Suppose on a computer that has an IP 192.168.0.2
Any help or code example. I did in JAVA using URL, but do not know how to do in ANSI-C.
In java:
-------
URL url = new... (3 Replies)
Hi All,
Not sure if this would be in a dummies sectiin or advanced. I'm looking for a script if someone has doen something like this.
I have list of files -
adc_earnedpoints.20070630.txt
adc_earnedpoints.20070707.txt
adc_earnedpoints.20070714.txt
adc_earnedpoints.20070721.txt... (1 Reply)
Hi my prob statement is to create a new file or to append to the 1tst file the followign chages.
File 1: txt file.
portfolio No a b c d
abc 1 Any Any Any charString
cds 2 values values values charString
efd 3 can can can charString
fdg 4 come come come charString... (4 Replies)
Hi all,
I have the following shell script code which tries to sftp and writes the log into the log file.
TestConnection ()
{
echo 'Connection to ' $DESTUSERNAME@$DESTHOSTNAME
$SETDEBUG
if ]; then rm $SCRIPT ; fi
touch $SCRIPT
echo "cd" $REMOTEDIR >> $SCRIPT
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Hello everybody,
I'm trying to code a program which makes the following:
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Please help me in writing data to a file in one row.
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Please find the code below writes :
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bool creat_fragments(int nFragment)
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Hi
I am trying to extract information out of a file but keep getting grep cant open errors
the code is below:
#bash
#extract orders with blank address details
#
# obtain the current date
# set today to the current date ccyymmdd format
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Hello all
As part of my TUI - (line based) Text User Interface, i do have 2 commands to assist working with conf files.
Now, for me they work, but since i wrote them, i automaticly use them they way they should be used... you know what i mean. ;)
Anyway, they are designed to read 'simple'... (3 Replies)
Discussion started by: sea
3 Replies
LEARN ABOUT DEBIAN
shprewind
SHAPELIB(1) User Commands SHAPELIB(1)NAME
shprewind - fix polygon ring orientations in ESRI shapefiles
SYNOPSIS
shprewind infile outfile
DESCRIPTION
Makes a copy of the shapefile infile to outfile and fixes the orientation of points in the rings of Polygon, PolygonZ, and PolygonM typed
shapes to conform to the shapefile specification. According to the specification, the vertices of outer rings should be oriented clockwise
on the X/Y plane, and those of inner rings counterclockwise.
Shapefiles actually consist of two files with the same basename and extensions .shp and .shx (or .SHP and .SHX) containing the shape data
and shape index respectively. The files to open are determined by first stripping any filename extension from infile and attempting to
open the files infile.shp or infile.SHP, and infile.shx or infile.SHX for the respective data and index files. The files to create from
outfile are determined by stripping any filename extension from outfile and appending .shp and .shx suffixes for the respective data and
index files.
EXIT STATUS
0 Successful program execution.
1 Missing infile or outfile arguments, failed to open shapefile infile or create shapefile outfile.
DIAGNOSTICS
The following diagnostics may be issued on stdout:
Unable to open:infile
Unable to create:outfile
count objects rewound.
AUTHORS
Frank Warmerdam (warmerdam@pobox.com) is the maintainer of the shapelib shapefile library. Joonas Pihlaja (jpihlaja@cc.helsinki.fi) wrote
this man page.
BUGS
The implementation assumes that there is at most one outer ring in each shape, that it is the first ring in a shape, and all other rings in
a shape are inner rings. Polygons inside MultiPatch shape types aren't rewound.
SEE ALSO dbfadd(1), dbfcreate(1), dbfdump(1), dbf_dump(1), shpadd(1), shpcreate(1), shpdump(1)shapelib OCTOBER 2004 SHAPELIB(1)