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What is the fastest integer division supporting division by zero no matter what the result is?
...the comments I got rid of the branch on my Pentium and gcc compiler using
int f (int x, int y)
{
y += y == 0;
return x/y;
}
The compiler basically recognizes that it can use a condition flag of the test in the addition.
As per request the assembly:
.globl f
.type f, @funct...
Best way to implement Enums with Core Data
...essors expect an NSNumber object rather than a scalar type, and you'll run into trouble if anything in the bindings or KVO systems try and access your value.
- (PaymentFrequency)itemTypeRaw {
return (PaymentFrequency)[[self itemType] intValue];
}
- (void)setItemTypeRaw:(PaymentFrequency)type {...
Use of Initializers vs Constructors in Java
...ariables whereas a constructor cannot
and you are correct on the first point, wrong on the second. You can, for example, do this:
class MyClass {
private final int counter;
public MyClass(final int counter) {
this.counter = counter;
}
}
Also, when a lot of code is shared be...
Best way to select random rows PostgreSQL
...ns (plus additional info in the comments),
You have a numeric ID column (integer numbers) with only few (or moderately few) gaps.
Obviously no or few write operations.
Your ID column has to be indexed! A primary key serves nicely.
The query below does not need a sequential scan of the big table,...
What is a proper naming convention for MySQL FKs?
...
In MySQL, there is no need to give a symbolic name to foreign key constraints. If a name is not given, InnoDB creates a unique name automatically.
In any case, this is the convention that I use:
fk_[referencing table name]_[referenced table name]_[referencing field name]
Example:
CREATE TABLE...
Get value of c# dynamic property via string
...().Be("Hilton");
typeAccessor = TypeAccessor.Create(expando.GetType());
((int)typeAccessor[expando, "Id"]).Should().Be(3);
((string)typeAccessor[expando, "Name"]).Should().Be("Monica");
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im...
Is MonoTouch now banned on the iPhone? [closed]
...are prohibited
Kind of a bummer, MonoTouch and the Flash CS5 -> iPhone converter are very cool.
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Populate a Razor Section From a Partial
...ds:
public static string RequireScript(this HtmlHelper html, string path, int priority = 1)
{
var requiredScripts = HttpContext.Current.Items["RequiredScripts"] as List<ResourceInclude>;
if (requiredScripts == null) HttpContext.Current.Items["RequiredScripts"] = requiredScripts = new ...
Java: random long number in 0
Random class has a method to generate random int in a given range. For example:
16 Answers
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What's the point of having pointers in Go?
I know that pointers in Go allow mutation of a function's arguments, but wouldn't it have been simpler if they adopted just references (with appropriate const or mutable qualifiers). Now we have pointers and for some built-in types like maps and channels implicit pass by reference.
...