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how to read System environment variable in Spring applicationContext
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You are close :o)
Spring 3.0 adds Spring Expression Language.
You can use
<util:properties id="dbProperties"
location="classpath:config_#{systemProperties['env']}/db.properties" />
Combined with java ... -Denv=QA should...
What REALLY happens when you don't free after malloc?
...ram exits. The only exception I can think of might be something like Palm OS where the program's static storage and runtime memory are pretty much the same thing, so not freeing might cause the program to take up more storage. (I'm only speculating here.)
So generally, there's no harm in it, exce...
How are everyday machines programmed?
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Most of what you're talking about are embedded based systems where C is a luxury often not available. They don't have software in the traditional sense. Most of the time the software is written in C, assembly, or even machin...
Use C++ with Cocoa Instead of Objective-C?
...to be pretty vanilla in its implementation on Linux and Windows but on Mac OS X it seems like additional Apple specific pieces of code are required (like an Obj-C wrapper). It also seems that Apple is forcing developers to write in Objective-C rather than C++, although I could be wrong.
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Pinging servers in Python
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This function works in any OS (Unix, Linux, macOS, and Windows)
Python 2 and Python 3
EDITS:
By @radato os.system was replaced by subprocess.call. This avoids shell injection vulnerability in cases where your hostname string might not be validated.
i...
How do I list one filename per output line in Linux?
... file per line and this was the top article. Can't believe how wordy the chosen answer is or that this answer has fewer votes than the one that pipes to cat. ls -1 ftw.
– crantok
May 21 '13 at 21:05
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How can I make one python file run another? [duplicate]
... because it's secure, fast, and maintainable. Code gets reused as it's supposed to be done. Most Python libraries run using multiple methods stretched over lots of files. Highly recommended. Note that if your file is called file.py, your import should not include the .py extension at the end.
The in...
Convert absolute path into relative path given a current directory using Bash
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$ python -c "import os.path; print os.path.relpath('/foo/bar', '/foo/baz/foo')"
gives:
../../bar
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Argparse optional positional arguments?
...ill need more than one dir)
parser.add_argument('dir', nargs='?', default=os.getcwd())
extended example:
>>> import os, argparse
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('-v', action='store_true')
_StoreTrueAction(option_strings=['-v'], dest='v', ...
Tool for adding license headers to source files? [closed]
... edited Mar 22 '16 at 22:06
joshperry
36.7k1414 gold badges8181 silver badges9797 bronze badges
answered Sep 30 '08 at 3:48
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