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C++ performance challenge: integer to std::string conversion
...he second algorithm is my actual submission for highest performance. In my tests it beats all the others on both gcc and msvc.
I think I know why some of the results on MSVC are very good. std::string has two relevant constructors
std::string(char* str, size_t n)
and
std::string(ForwardIterator b...
Efficient SQL test query or validation query that will work across all (or most) databases
Many database connection pooling libraries provide the ability to test their SQL connections for idleness. For example, the JDBC pooling library c3p0 has a property called preferredTestQuery , which gets executed on the connection at configured intervals. Similarly, Apache Commons DBCP has valid...
A semantics for Bash scripts?
...in/[ exists on many systems.
$ if '/bin/[' -f '/bin/['; then echo t; fi # Tested as-is on OS X, without the `]`
t
wat?
This makes a lot more sense if you look at how a shell is implemented. Here's an implementation I did as an exercise. It's in Python, but I hope that's not a hangup for anyone. ...
Get class name of django model
...ok._meta).
This question is quite old, but I found the following helpful (tested on Django 1.11, but might work on older...), as you may also have the same model name from multiple apps.
Assuming Book is in my_app:
print(Book._meta.object_name)
# Book
print(Book._meta.model_name)
# book
print(B...
How to access app.config in a blueprint?
... must have some request context. If you don't have one (some pre-work like testing, e.g.) you'd better place
with app.test_request_context('/'):
before this current_app call.
You will have RuntimeError: working outside of application context , instead.
...
How to Publish Web with msbuild?
...
created build script msbuild test.sln /p:DeployOnBuild=True /p:DeployDefaultTarget=WebPublish /p:WebPublishMethod=FileSystem /p:DeleteExistingFiles=True /p:publishUrl=.\build_output1\pub /p:PublishProfile=FolderProfile /p:VisualStudioVersion=11.0 /p:outd...
Algorithm to detect overlapping periods [duplicate]
...s the opposite: "no if either died before the other was born." In effect, testing for case 5 only: overlap = !(a.start > b.end || b.start > a.end)
– Bob Stein
Mar 10 '15 at 22:43
...
How to disassemble one single function using objdump?
...x0000000000001147 <+18>: c3 retq
End of assembler dump.
Tested on Ubuntu 16.04, GDB 7.11.1.
objdump + awk workarounds
Print the paragraph as mentioned at: https://unix.stackexchange.com/questions/82944/how-to-grep-for-text-in-a-file-and-display-the-paragraph-that-has-the-text
o...
Specifying an Index (Non-Unique Key) Using JPA
...va EE 7, which is out .
If you like living on the edge, you can get the latest snapshot for eclipselink from their maven repository (groupId:org.eclipse.persistence, artifactId:eclipselink, version:2.5.0-SNAPSHOT). For just the JPA annotations (which should work with any provider once they support ...
How to spyOn a value property (rather than a method) with Jasmine
...h is perfectly okay. You'd be "changing the behaviour" only inside the the test which is what you were trying to achieve with the spyOn.
– Fabio Milheiro
Aug 14 '14 at 8:13
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