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Is it better in C++ to pass by value or pass by constant reference?
...d be able to figure out when passing by value is expensive, and implicitly convert the call to use a const ref if possible.
In theory. In practice, compilers can’t always change this without breaking the function’s binary interface. In some special cases (when the function is inlined) the copy ...
PHP_SELF vs PATH_INFO vs SCRIPT_NAME vs REQUEST_URI
...SELF into SCRIPT_FILENAME + PATH_INFO
Server performs alias resolution and converts the entire url path to a system file path to get SCRIPT_FILENAME
Resulting script file may include others, where __FILE__ refers to the path to the current file
...
Why are unsigned int's not CLS compliant?
...verflow checking, and sign-agnostic addition mod 2^32, etc.; when asked to convert an object reference to a 32-bit integer primitive, the CLR neither knows nor cares whether the code using that number expects it to be signed or unsigned. Whether the compiler believes a number is signed or unsigned ...
Detect & Record Audio in Python
...because they compute on bytes and not shorts. That buffer would have to be converted into a numpy array before processing.
– ArekBulski
Feb 16 '17 at 14:46
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Different floating point result with optimization enabled - compiler bug?
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I think this is the answer. The constant 4.55 gets converted to 4.54999999999999 which is the closest binary representation in 64 bits; multiply by 10 and round again to 64 bits and you get 45.5. If you skip the rounding step by keeping it in an 80-bit register you end up wit...
When to use Preorder, Postorder, and Inorder Binary Search Tree Traversal strategies
... Pre-Order, In-order or Post-Order?
The traversal strategy the programmer selects depends on the specific needs of the algorithm being designed. The goal is speed, so pick the strategy that brings you the nodes you require the fastest.
If you know you need to explore the roots before inspecting ...
What is the best way to force yourself to master vi? [closed]
...h, you can even use them to browse the filesystem.
– converter42
Nov 29 '08 at 16:25
Objective-C ARC: strong vs retain and weak vs assign
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retain is the same as strong.
apple says if you write retain it will auto converted/work like strong only.
methods like "alloc" include an implicit "retain"
Example:
@property (nonatomic, retain) NSString *name;
@synthesize name;
4.assign
assign is the default and simply performs a variabl...
iOS 8 removed “minimal-ui” viewport property, are there other “soft fullscreen” solutions?
...which pinned the primary CTA to the bottom of the screen.. this worked and converted great! It felt very "native" and seamless. Which i think is the exact problem. If you think about it, it's not in Apples' best interest for web apps to feel native. It is in fact a direct conflict of interest with t...
What are the disadvantages of using persistent connection in PDO
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I hope I had read this answer before running SELECT orders.* FROM orders LEFT JOIN items USING(item_id)
– Ast Derek
Jul 26 '10 at 18:09
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