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What is the most ridiculous pessimization you've seen? [closed]
...a 32-bit wide memory access and then mask out or shift the bits not needed for the 16-bit value.
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What is the most accurate way to retrieve a user's correct IP address in PHP?
I know there are a plethora of $_SERVER variables headers available for IP address retrieval. I was wondering if there is a general consensus as to how to most accurately retrieve a user's real IP address (well knowing no method is perfect) using said variables?
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Is it better in C++ to pass by value or pass by constant reference?
...t used to be generally recommended best practice1 to use pass by const ref for all types, except for builtin types (char, int, double, etc.), for iterators and for function objects (lambdas, classes deriving from std::*_function).
This was especially true before the existence of move semantics. The...
How to exclude a directory in find . command
I'm trying to run a find command for all JavaScript files, but how do I exclude a specific directory?
38 Answers
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How do I send a cross-domain POST request via JavaScript?
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Update: Before continuing everyone should read and understand the html5rocks tutorial on CORS. It is easy to understand and very clear.
If you control the server being POSTed, simply leverage the "Cross-Origin Resource Sharing standar...
scala vs java, performance and memory? [closed]
... I cant seem to find an answer to:
in general, is there a difference in performance and usage of memory between Scala and Java?
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How to import a Python class that is in a directory above?
...from within pkg.subpkg1 you will import pkg.subpkg2.mod. The specification for relative imports is contained within PEP 328.
PEP 328 deals with absolute/relative imports.
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How can I check if a string represents an int, without using try/except?
...onic to solve simple problem with complex mechanism? There is an algorithm for detecting int's written inside function "int" -- I don't see why isn't this exposed as a boolean function.
– Aivar
Sep 23 '11 at 20:21
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Is there a REAL performance difference between INT and VARCHAR primary keys?
Is there a measurable performance difference between using INT vs. VARCHAR as a primary key in MySQL? I'd like to use VARCHAR as the primary key for reference lists (think US States, Country Codes) and a coworker won't budge on the INT AUTO_INCREMENT as a primary key for all tables.
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Recursion in Angular directives
...RecursionHelper.compile(element);
}
};
}]);
See this Plunker for a demo.
I like this solution best because:
You don't need an special directive which makes your html less clean.
The recursion logic is abstracted away into the RecursionHelper service, so you keep your directives clean...