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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...
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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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,...
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 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 {...
Test if lists share any items in python
... ways to test if two lists a and b share any items. The first option is to convert both to sets and check their intersection, as such:
bool(set(a) & set(b))
Because sets are stored using a hash table in Python, searching them is O(1) (see here for more information about complexity of operator...
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...
How do I create a self-signed certificate for code signing on Windows?
...issuer key and certificate (the -ic and -iv switches).
We'll also want to convert the certificate and key into a PFX file:
pvk2pfx -pvk MySPC.pvk -spc MySPC.cer -pfx MySPC.pfx
If you want to protect the PFX file, add the -po switch, otherwise PVK2PFX creates a PFX file with no passphrase.
Using...
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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How to translate between Windows and IANA time zones?
...erefore, I've encapsulated the complexity of the solution into the TimeZoneConverter micro-library, which can be installed from Nuget.
Using this library is simple. Here are some examples of conversion:
string tz = TZConvert.IanaToWindows("America/New_York");
// Result: "Eastern Standard Time"
st...