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Efficient way to remove ALL whitespace from String?
...WhiteSpace1(string input, string expected)
{
string s = null;
for (int i = 0; i < 1000000; i++)
{
s = input.RemoveWhitespace();
}
Assert.AreEqual(expected, s);
}
[Test]
[TestCase("123 123 1adc \n 222", "1231231adc222")]
public void RemoveWhiteSpace2(string input, stri...
Programmatically relaunch/recreate an activity?
...a recreate() method to activities.
I've done that by simply reusing the intent that started the activity. Define an intent starterIntent in your class and assign it in onCreate() using starterIntent = getIntent();. Then when you want to restart the activity, call finish(); startActivity(starterIn...
Is it possible to figure out the parameter type and return type of a lambda?
...aits<ReturnType(ClassType::*)(Args...) const>
// we specialize for pointers to member function
{
enum { arity = sizeof...(Args) };
// arity is the number of arguments.
typedef ReturnType result_type;
template <size_t i>
struct arg
{
typedef typename std:...
MySQL error: key specification without a key length
... TEXT(88) simply won’t work.
The error will also pop up when you try to convert a table column from non-TEXT and non-BLOB type such as VARCHAR and ENUM into TEXT or BLOB type, with the column already been defined as unique constraints or index. The Alter Table SQL command will fail.
The solution...
C# elegant way to check if a property's property is null
... you can use the Null Conditional Operator. So the original test will be:
int? value = objectA?.PropertyA?.PropertyB?.PropertyC;
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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...
Favicon dimensions? [duplicate]
...upport possible. You upload an image and this site gives you the code, the converted images and a browserconfig file.
We could simply upload a favicon manually to our website of 16x16 and it will probably show up in almost any browser.
But when you will mark it as one of your favorites on your s...
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,...