11-11-2005
Variable names
Hi,
I have a variable v_iteration which can equal any 3 digit number eg 001 or 926
I would like to dynamically make a new variable name up using this 3 digit number
eg
v_another_variable_001=fred
v_another_variable_926=joe
The following are examples of what I have tried
v_another_variable_$v_iteration=fred
v_another_variable_"$v_iteration"=fred
and
eval v_another_variable_"$_viteration"=fred
all of which return the following error
v_another_variable_ : parameter not set
Can anyone help me with this please? I am using Korn Shell.
Many thanks
Helen
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi
I have several variables called
var1, var2, var3, var4 and so on.
I would like to examine the contents of the variables using a loop
and a variable called num which equals a figure
eg
num=3
I wanted to do something like
echo $var$num
to display the contents of var3 (4 Replies)
Discussion started by: Bab00shka
4 Replies
2. UNIX for Dummies Questions & Answers
I am trying to process error files in selected directories. I can count the files that are there and export the contents to a file for either emailing or printing. The next step is to move the files to a processed directory with the name changed to .fixed as the last extension.
for file in... (2 Replies)
Discussion started by: jagannatha
2 Replies
3. Shell Programming and Scripting
Is there a way to do make-style computed variable names in awk? e.g. in make
foo = bar
bar = wocket
I can get "wocket" with $($(foo))
Alternatively can you list all defined variables in awk?
thanks (4 Replies)
Discussion started by: craig06y
4 Replies
4. UNIX for Dummies Questions & Answers
Hi Everyone,
I was just curious if you are allowed to begin a variable name with a number. For example, I would really like to have the variable 8DAY_AVERAGE. But my shell script only seems to allow EIGHTDAY_AVERAGE. Is there a way I can get the former to work? I am using bash. Thanks a lot!
... (1 Reply)
Discussion started by: msb65
1 Replies
5. Shell Programming and Scripting
I am trying to write a piece of code that will call a value from an array. There are multiple arrays that I need to call data from. Only one array needs to be used based on the step within the program. The arrays have the names "cue_0", "cue_1", and so on.
I can't figure out how to call a value... (2 Replies)
Discussion started by: vockleya
2 Replies
6. Shell Programming and Scripting
Hi All ,
I am having confusion in a shell script. Please guide me.
I need to get multiple files (number of files vary time to time, file names are separated by '|') using FTP get from the remote server.
Actually, i call the FTP function in a loop. At the last step, i need to move all the get... (3 Replies)
Discussion started by: spkandy
3 Replies
7. UNIX for Dummies Questions & Answers
Hi,
I am using BASH. I have encountered a situation where the following is necessary (but I am not sure how to do it):
#Define multiple arrays, whose names only differ by a number:
ARRAY_1=(1 2 3)
ARRAY_2=(4 5 6)
ARRAY_3=(7 8 9)
#Define ARRAY_AMOUNT, the number of arrays. In this case... (1 Reply)
Discussion started by: msb65
1 Replies
8. Shell Programming and Scripting
Simple enough problem I think, I just can't seem to get it right.
The below doesn't work as intended, it's just a function defined in a much larger script:
CheckValues() {
for field in \
Group_ID \
Group_Title \
Rule_ID \
Rule_Severity \
... (2 Replies)
Discussion started by: Vryali
2 Replies
9. Shell Programming and Scripting
If I run two different TCSH scripts simultaneously that use identical variable names will this cause any problems? (1 Reply)
Discussion started by: thibodc
1 Replies
10. Shell Programming and Scripting
Hi All
I think I might have bitten off more than I can chew here and I'm hoping some of you guys with advanced pattern matching skills can help me.
What I want to do is index the occurrence of variable names within a library of scripts that I have. Don't ask why, I'm just sad like that...
... (3 Replies)
Discussion started by: bbq
3 Replies
LEARN ABOUT DEBIAN
vipsthumbnail
VIPSTHUMBNAIL(1) General Commands Manual VIPSTHUMBNAIL(1)
NAME
vipsthumbnail - make thumbnails of image files
SYNOPSIS
vipsthumbnail [flags] imagefile1 imagefile2 ...
DESCRIPTION
vipsthumbnail(1) processes each imagefile in turn, shrinking each image to fit within a 128 by 128 pixel square. The shrunk image is writ-
ten to a new file named tn_imagefile.jpg. This program is typically faster and uses less memory than other image thumbnail programs.
For example:
$ vipsthumbnail fred.png jim.tif
will read image files fred.png and jim.tif and write thumbnails to the files tn_fred.jpg and tn_jim.jpg.
$ vipsthumbnail --size=64 -o thumbnails/%s.png fred.jpg
will read image file fred.jpg and write a 64 x 64 pixel thumbnail to the file thumbnails/fred.png.
On Unix machines, vips will create temporary files in "/tmp" by default. Use the environment variable TMPDIR to change this location. On
Windows, vips uses GetTempPath() to pick a location, see the MS documentation.
Use the --vips-disc-threshold command-line switch, or the IM_DISC_THRESHOLD environment variable, to make vipsthumbnail use memory rather
than temporary files.
OPTIONS
-s N, --size=N
Set the output thumbnail size to N x N pixels. The image is shrunk so that it just fits within this area, Images which are smaller
than this are expanded.
-o FORMAT, --output=FORMAT
Set the output format string. The input filename has any file type suffix removed, then that value is substitued into FORMAT replac-
ing %s. The default value is tn_%s.jpg meaning JPEG output, with tn_ prepended. You can add format options too, for example
tn_%s.jpg:20 will write JPEG images with Q set to 20.
-p I, --interpolator=I
Resample with interpolator I. Use vips --list classes to see a list of valid interpolators. The default is bilinear.
-n, --nosharpen
By default, vipsthumbnail(1) will sharpen thumbnails slightly to make them look more pleasing. This option disables this sharpening.
-e PROFILE, --eprofile=PROFILE
Export thumbnails with this ICC profile. Images are only colour-transformed if there is both an output and an input profile avail-
able. The input profile can either be embedded in the input image or supplied with the --iprofile option.
-i PROFILE, --iprofile=PROFILE
Import images with this ICC profile, if no profile is embdedded in the image. Images are only colour-transformed if there is both
an output and an input profile available. The output profile should be supplied with the --oprofile option.
-l, --nodelete
Don't delete the profile from the output image. Since all output images will generally have the same profile, vipsthumbnail(1) will
usually delete it. This option leaves the profile inside the image.
-v, --verbose
vipsthumbnail(1) normally runs silently, except for warning and error messages. This option makes it print a list of the operations
it performs on each image.
RETURN VALUE
returns 0 on success and non-zero on error.
SEE ALSO
header(1)
13 May 2010 VIPSTHUMBNAIL(1)