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Bash tool to get nth line from a file
...here's a Bash tool that specifically extracts a line (or a range of lines) from a file.
19 Answers
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How to call Makefile from another Makefile?
I'm getting some unexpected results calling one makefile from another. I have two makefiles, one called /path/to/project/makefile and one called /path/to/project/gtest-1.4.0/make/Makefile . I'm attempting to have the former call the latter. In /path/to/project/makefile, I have
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Convert a number range to another range, maintaining ratio
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This is wrong. You need to subtract Old Min from Old Value before the divide.
– SPWorley
May 30 '09 at 5:54
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How to change the opacity (alpha, transparency) of an element in a canvas element after it has been
...ay to achieve it is the setTimeout function, look that up to create a loop from which you alter the alpha over time.
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libpthread.so.0: error adding symbols: DSO missing from command line
...t on the order of modules. Symbols are first requested, and then linked in from a library that has them. So you have to specify modules that use libraries first, and libraries after them. Like this:
gcc x.o y.o z.o -la -lb -lc
Moreover, in case there's a circular dependency, you should specify th...
Is it possible to do start iterating from an element other than the first using foreach?
...oreach to traverse my tree. However as far as I know foreach always starts from the first element of the collection. I would like to choose from which element foreach starts. Is it possible to somehow change the element from which foreach starts?
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Understanding how recursive functions work
...der to understand recursion, you must first understand recursion." replies from various online threads I still am not quite getting it.
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Catching an exception while using a Python 'with' statement
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from __future__ import with_statement
try:
with open( "a.txt" ) as f :
print f.readlines()
except EnvironmentError: # parent of IOError, OSError *and* WindowsError where available
print 'oops'
If you want d...
How I can I lazily read multiple JSON values from a file/stream in Python?
I'd like to read multiple JSON objects from a file/stream in Python, one at a time. Unfortunately json.load() just .read() s until end-of-file; there doesn't seem to be any way to use it to read a single object or to lazily iterate over the objects.
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How can I String.Format a TimeSpan object with a custom format in .NET?
...self must be escaped unless you're using a verbatim string).
This excerpt from the MSDN Custom TimeSpan Format Strings page explains about escaping the ":" and "." characters in a format string:
The custom TimeSpan format specifiers do not include placeholder separator symbols, such as the symb...