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Why '&&' and not '&'?
...lopers typically worry about stuff like this - and you never know who will read the answers; so it's always best to document even the borderline/extreme cases.
– Jonathan Dickinson
Sep 7 '11 at 12:30
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Microsecond timing in JavaScript
...cision in JavaScript out of a millisecond timer. Impossible? Nope. Keep reading:
I'm doing some high-precisio experiments that requires self-checked timer accuracies, and found I was able to reliably get 0.1 millisecond precision with certain browsers on certain systems.
I have found that in mo...
Most simple but complete CMake example
...rstand how CMake is meant to be written, it vanishes in the next example I read. All I want to know is, how should I structure my project, so that my CMake requires the least amount of maintainance in the future. For example, I don't want to update my CMakeList.txt when I am adding a new folder in m...
Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?
... being "as fast as C" is more about generic C than highly optimized multithreaded cache-aware C libraries used for numerics. For numerics, Python is just used to ferry around pointers to big arrays. So PyPy being "as fast as C" means "your pointers+metadata get moved around as fast as C". Not a big ...
How to update Python?
...ogether, it would require some hacking, so I'll save that exercise for the reader. If you don't want to hack, I suggest that if switching bit-versions, remove the other bit-version first.
UPDATES: 2016-05-16
Anaconda and MiniConda can be used with an existing Python installation by disabling the ...
What's the cause of this FatalExecutionEngineError in .NET 4.5 beta? [closed]
...nce optimizations. Many of the String methods are now performed using a Thread static cached StringBuilder object.
I followed that lead for a while, but StringBuilder isn't used on the Trim code path, so I decided it couldn't be a Thread static problem.
I think I found a strange manifestation of ...
CORS - What is the motivation behind introducing preflight requests?
...primary beneficiary of the preflight mechanism. Yes these services could already be abused by a malicious or non-conforming user agent (and CORS does nothing to change this), but in a world with CORS the preflight mechanism provides an extra 'sanity check' so that clients and servers don't break bec...
How do you use bcrypt for hashing passwords in PHP?
...y hashing algorithm. You cannot retrieve the plain text password without already knowing the salt, rounds and key (password). [Source]
How to use bcrypt:
Using PHP >= 5.5-DEV
Password hashing functions have now been built directly into PHP >= 5.5. You may now use password_hash() to create a...
How to import a Python class that is in a directory above?
...uple of os.path.dirname calls will do;-), then (if that directory is not already on sys.path) prepend temporarily insert said dir at the very start of sys.path, __import__, remove said dir again -- messy work indeed, but, "when you must, you must" (and Pyhon strives to never stop the programmer from...
How do I modify fields inside the new PostgreSQL JSON datatype?
...to typecast to::jsonb
More info : JSON Functions and Operators
You can read my note here
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