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Effect of NOLOCK hint in SELECT statements
...'t care what state it is in, and don't bother holding it still while you read from it. It is all at once faster, less resource-intensive, and very very dangerous.
You should be warned to never do an update from or perform anything system critical, or where absolute correctness is required using da...
OS detecting makefile
...
There are many good answers here already, but I wanted to share a more complete example that both:
doesn't assume uname exists on Windows
also detects the processor
The CCFLAGS defined here aren't necessarily recommended or ideal; they're just what the proj...
When should I use a table variable vs temporary table in sql server?
...BA site looking at the differences between the two object types. This also addresses your question about disk vs memory (I didn't see any significant difference in behaviour between the two).
Regarding the question in the title though as to when to use a table variable vs a local temporary table yo...
Create a submodule repository from a folder and keep its git commit history
...nd make a git repository from it and then including it as a submodule instead of a folder.
Inspired from Gerg Bayer's article Moving Files from one Git Repository to Another, Preserving History
At the beginning, we have something like this:
<git repository A>
someFolders
someFiles
...
How does BLAS get such extreme performance?
... A. van de Geijn and Enrique S. Quintana-Ortí. They provide a free download version.
BLAS is divided into three levels:
Level 1 defines a set of linear algebra functions that operate on vectors only. These functions benefit from vectorization (e.g. from using SSE).
Level 2 functions are matrix-...
How to specify function types for void (not Void) methods in Java8?
... in this case because it receives a parameter and has a return value. Instead you should use Consumer (formerly known as Block)
The Function type is declared as
interface Function<T,R> {
R apply(T t);
}
However, the Consumer type is compatible with that you are looking for:
interface C...
What really happens in a try { return x; } finally { x = null; } statement?
...to the variable (inside the handled block), then after exiting the block loads the variable, then returns it. Reflector renders this as:
private static int Test()
{
int CS$1$0000;
try
{
CS$1$0000 = SomeNumber();
}
finally
{
Foo();
}
return CS$1$0000;
...
How to backup a local Git repository?
... just to avoid magic "strings"
filename_suffix = ".git.bundle" # will be added to the filename of the created backup
# Test if we are inside a git repo
`git status 2>&1`
if $?.exitstatus != 0
puts 'fatal: Not a git repository: .git or at least cannot get zero exit status from "git st...
64-bit version of Boost for 64-bit windows
...
As a short answer:
bjam --toolset=msvc-9.0 address-model=64 --build-type=complete
As a longer answer, here are my build notes for having VS .NET 2008 32-bit and 64-bit boost libraries in the same hierarchy (which is I suspect a common use case):
Build the win32 bi...
How to check file MIME type with javascript before upload?
I have read this and this questions which seems to suggest that the file MIME type could be checked using javascript on client side. Now, I understand that the real validation still has to be done on server side. I want to perform a client side checking to avoid unnecessary wastage of server res...