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Performance of Find() vs. FirstOrDefault() [duplicate]
Got an interesting outcome searching for Diana within a large sequence of a simple reference type having a single string property.
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Python argparse: Make at least one argument required
I've been using argparse for a Python program that can -process , -upload or both:
11 Answers
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Get ID of last inserted document in a mongoDB w/ Java driver
... edited May 7 '19 at 9:13
Paolo Forgia
5,50477 gold badges3535 silver badges5555 bronze badges
answered Jul 26 '10 at 21:41
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How do you programmatically set an attribute?
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setattr(x, attr, 'magic')
For help on it:
>>> help(setattr)
Help on built-in function setattr in module __builtin__:
setattr(...)
setattr(object, name, value)
Set a named attribute on an object; setattr(x, 'y', v) is equivalent to
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How to implement a queue with three stacks?
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SUMMARY
O(1) algorithm is known for 6 stacks
O(1) algorithm is known for 3 stacks, but using lazy evaluation which in practice corresponds to having extra internal data structures, so it does not constitute a solution
People near Sedgewick have confirmed th...
How do I find the location of my Python site-packages directory?
...kages") directories are listed in sys.path when you run:
python -m site
For a more concise list run getsitepackages from the site module in Python code:
python -c 'import site; print(site.getsitepackages())'
Note: With virtualenvs getsitepackages is not available, sys.path from above will list...
How do you debug PHP scripts? [closed]
...n the same environment as javascript.
I also use Xdebug mentioned earlier for profiling php.
share
edited Oct 7 '15 at 8:29
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How to set or change the default Java (JDK) version on OS X?
...ntents/Home
Pick the version you want to be the default (1.6.0_65-b14-462 for arguments sake) then:
export JAVA_HOME=`/usr/libexec/java_home -v 1.6.0_65-b14-462`
or you can specify just the major version, like:
export JAVA_HOME=`/usr/libexec/java_home -v 1.8`
Now when you run java -version you wi...
How do I include a pipe | in my linux find -exec command?
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In your example you can either choose to use your top level shell to perform the piping like so:
find -name 'file_*' -follow -type f -exec zcat {} \; | agrep -dEOE 'grep'
In terms of efficiency this results costs one invocation of find, numerous invocations of zcat, and one invocation of agrep...
How can I hash a password in Java?
I need to hash passwords for storage in a database. How can I do this in Java?
13 Answers
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