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How do I perform a Perl substitution on a string while keeping the original?
In Perl, what is a good way to perform a replacement on a string using a regular expression and store the value in a different variable, without changing the original?
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Design Pattern for Undo Engine
...nginering application. I have one huge model class representing the entire building, which include collections of nodes, line elements, loads, etc. which are also custom classes.
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How can I convert tabs to spaces in every file of a directory?
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Warning: This will break your repo.
This will corrupt binary files, including those under svn, .git! Read the comments before using!
find . -iname '*.java' -type f -exec sed -i.orig 's/\t/ /g' {} +
The original file is saved as...
Can you call Directory.GetFiles() with multiple filters?
I am trying to use the Directory.GetFiles() method to retrieve a list of files of multiple types, such as mp3 's and jpg 's. I have tried both of the following with no luck:
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How to select only the records with the highest date in LINQ
I have a table, 'lasttraces', with the following fields.
5 Answers
5
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How to zero pad a sequence of integers in bash so that all have the same width?
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In your specific case though it's probably easiest to use the -f flag to seq to get it to format the numbers as it outputs the list. For example:
for i in $(seq -f "%05g" 10 15)
do
echo $i
done
will produce the following output:
00010
00011
000...
Finding local maxima/minima with Numpy in a 1D numpy array
...n from numpy/scipy that can find local maxima/minima in a 1D numpy array? Obviously the simplest approach ever is to have a look at the nearest neighbours, but I would like to have an accepted solution that is part of the numpy distro.
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Search and replace in bash using regular expressions
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Use sed:
MYVAR=ho02123ware38384you443d34o3434ingtod38384day
echo "$MYVAR" | sed -e 's/[a-zA-Z]/X/g' -e 's/[0-9]/N/g'
# prints XXNNNNNXXXXNNNNNXXXNNNXNNXNNNNXXXXXXNNNNNXXX
Note that the subsequent -e's are processed in order. Also, the g flag for the expression will mat...
usr/bin/ld: cannot find -l
I'm trying to compile my program and it returns this error :
14 Answers
14
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How do I find a “gap” in running counter with SQL?
I'd like to find the first "gap" in a counter column in an SQL table. For example, if there are values 1,2,4 and 5 I'd like to find out 3.
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