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When to use inline function and when not to use it?
...iron reason to avoid inlining a function. The implementation is obliged to allocate a single static object for each function static whether or not the function is declared inline or not. Classes are still extensible if they have inline constructors and virtual destructors. And empty brace destructor...
Performance differences between debug and release builds
...s is a big one, it makes property accessors essentially free.
CPU register allocation. Local variables and method arguments can stay stored in a CPU register without ever (or less frequently) being stored back to the stack frame. This is a big one, notable for making debugging optimized code so di...
Redis: Show database size/size for keys
...ue require to be stored in RAM.
The reported usage is the total of memory allocations for data and administrative overheads that a key its value require
(source redis documentation)
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Mark parameters as NOT nullable in C#/.NET?
...de
what else to assign to it? What other value could we pave a freshly
allocated array of references over with, until you get around to
filling it in?
Also, sometimes null is a sensible value in and of itself. Sometimes
you want to represent the fact that, say, a field doesn’t have a
...
How to know what the 'errno' means?
...LOCK Resource temporarily unavailable
12 ENOMEM Cannot allocate memory
13 EACCES Permission denied
14 EFAULT Bad address
15 ENOTBLK Block device required
16 EBUSY Device or resource busy
17 EEXIST File exists
...
Setting variable to NULL after free
... int *nPtr=NULL;. Now, I would agree that this would be redundant, with a malloc following right in the next line. However, if there is code between the declaration and the first initialization, somebody might start using the variable even though it has no value yet. If you null-initialize, you get ...
How can I initialize base class member variables in derived class constructor?
...onstructor. It will first be default-initialized when the instance of B is allocated, then it will be assigned inside the B's constructor. But I also think the compiler can still optimize this.
– Violet Giraffe
Jan 10 '19 at 11:36
...
Autocompletion in Vim
...t. You have to "hack" it to make it work with JavaScript, ActionScript and PHP. Here I explain how I do it. And here is another hint for PHP.
– romainl
Mar 2 '11 at 20:07
...
Check if passed argument is file or directory in Bash
...sdas: cannot open `ldasdas' (No such file or directory))
$ ./f.bash evil.php
FILE FOUND (evil.php: PHP script, ASCII text)
FYI: the answers above work but you can use -s to help in weird situations by checking for a valid file first:
#!/bin/bash
check_file(){
local file="${1}"
[[ -s ...
No output to console from a WPF application?
...32.dll";
[DllImport(Kernel32_DllName)]
private static extern bool AllocConsole();
[DllImport(Kernel32_DllName)]
private static extern bool FreeConsole();
[DllImport(Kernel32_DllName)]
private static extern IntPtr GetConsoleWindow();
[DllImport(Kernel32_DllName)]
p...