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How do I fetch lines before/after the grep result in bash?
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You can use the -B and -A to print lines before and after the match.
grep -i -B 10 'error' data
Will print the 10 lines before the match, including the matching line itself.
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Pickle or json?
...ed to save to disk a little dict object whose keys are of the type str and values are int s and then recover it . Something like this:
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pdftk compression option
I use pdftk to compress a pdf using the following command line
10 Answers
10
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How to check sbt version?
...t to use sbt about that (copying Mark Harrah's comment):
The about command was added recently to try to succinctly print the
most relevant information, including the sbt version.
share
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impr...
How do I execute inserts and updates in an Alembic upgrade script?
...ms.
Note that Alembic provides some basic data functions: op.bulk_insert() and op.execute(). If the operations are fairly minimal, use those. If the migration requires relationships or other complex interactions, I prefer to use the full power of models and sessions as described below.
The followi...
Is it possible in Java to catch two exceptions in the same catch block? [duplicate]
I need to catch two exceptions because they require the same handling logic. I would like to do something like:
6 Answers
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How to check if a Ruby object is a Boolean
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Yes, that's called duck typing and a core principle of OOP. I think it's a feature.
– Konstantin Haase
Jun 19 '12 at 16:41
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Is git-svn dcommit after merging in git dangerous?
My motivation for trying out git-svn is the effortless merging and branching. Then I noticed that man git-svn(1) says:
6 A...
How to generate .NET 4.0 classes from xsd?
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simple enough; just run (at the vs command prompt)
xsd your.xsd /classes
(which will create your.cs). Note, however, that most of the intrinsic options here haven't changed much since 2.0
For the options, use xsd /? or see MSDN; for example /enableDataBinding ...
In a Bash script, how can I exit the entire script if a certain condition occurs?
...oniLeigh If it's closing the "window" likely you're putting the exit # command inside a function, not a script. (In which case use return # instead.)
– Jamie
Jan 6 at 20:27
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