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Is String.Format as efficient as StringBuilder
...oString() on the StringBuilder object. Over a great many iterations, that time makes a big difference, and means that he's not quite comparing apples to apples. That's the reason he shows such great performance for StringBuilder and probably accounts for his surprise. I just repeated the benchmar...
DESTDIR and PREFIX of make
...Sepcify a different --prefix location/option for each build - at configure time. For eg:
untar petsc tar ball
./configure --prefix=/opt/petsc/petsc-3.9.0-mpich --with-mpi-dir=/opt/mpich
make
make install DESTDIR=/tmp/petsc-pkg
untar petsc tar ball
./configure --prefix=/opt/petsc/petsc-3.9.0-openmpi...
How to forward declare a C++ template class?
...e a templated class whose definition states the default arguments, but any time you reference the class you must include all of its arguments until the definition is introduced.
eg. Let's use std::vector without including it (the second argument of std::vector is defined with a default):
namespace s...
Unloading classes in java?
...also have version problems if we don't load the classes dynamically at run time from the AppServer library.
7 Answers
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What is the main difference between Inheritance and Polymorphism?
...entation of read, which method gets called is determined for you by the runtime, depending if you have a Person or a Student. It gets a bit tricky, but if you do something like
Person p = new Student();
p.read();
the read method on Student gets called. Thats the polymorphism in action. You can...
How do you install Google frameworks (Play, Accounts, etc.) on a Genymotion virtual device? [duplica
...ayer] [Error] [Adb][shell] Unable to finished process: "Process operation timed out"
Try to apply the flash using adbdirectly:
$ adb -s 192.168.56.101:5555 shell "/system/bin/check-archive.sh /sdcard/Download/gapps-jb-20121011-signed.zip"
$ adb -s 192.168.56.101:5555 shell "/system/bin/flash-ar...
Why wasn't PyPy included in standard Python?
...nstance the SciPy project).
The PyPy JIT compilation step itself costs CPU time -- it's only through repeated running of compiled code that it becomes faster overall. This means startup times can be higher, and therefore PyPy isn't necessarily as efficient for running glue code or trivial scripts.
...
The Guava library: What are its most useful and/or hidden features? [closed]
...ers have not really mentioned that I love:
Multimaps are just great. Any time you would use something like Map<Foo, Collection<Bar>>, use a multimap instead and save yourself a ton of tedious checking for an existing collection mapped to a key and creating and adding it if it isn't the...
Ng-model does not update controller value
...nsole log</button>
</div>
</div>
Edit: At the time writing this answer, I had much more complicated situation than this. After the comments, I tried to reproduce it to understand why it works, but no luck. I think somehow (don't really know why) a new child scope is gene...
Why does Iterable not provide stream() and parallelStream() methods?
...t was just an omission. But you can see here that it was discussed several times over the years during the design of the API.
Lambda Libs Spec Experts
I found a discussion about this in the Lambda Libs Spec Experts mailing list:
Under Iterable/Iterator.stream() Sam Pullara said:
I was working...