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Using the Swift if let with logical AND operator &&
We know that we can use an if let statement as a shorthand to check for an optional nil then unwrap.
6 Answers
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How do I make a splash screen?
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Further reading:
App Launch time & Themed launch screens (Android Performance Patterns Season 6 Ep. 4)
Splash screen in Android: The right way
Old answer:
HOW TO: Simple splash screen
This answers shows you how to display a splash screen for a fixed amount of time when your app ...
Solving “The ObjectContext instance has been disposed and can no longer be used for operations that
...rties should be marked as virtual - EF creates proxy class for your entity and overrides navigation properties to allow lazy-loading. E.g. if you have this entity:
public class MemberLoan
{
public string LoandProviderCode { get; set; }
public virtual Membership Membership { get; set; }
}
En...
Linq order by boolean
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Just wanted to do this and it seems like something with no implicit ordering. I did the following to be more explicit:
Something.OrderBy(e=>e.SomeFlag ? 0 : 1)
to sort something true to false.
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Count number of days between two dates
... dates.
The one that comes closest is by thatdankent. A full answer would convert to_i and then divide:
(Time.now.to_i - 23.hours.ago.to_i) / 86400
>> 0
(Time.now.to_i - 25.hours.ago.to_i) / 86400
>> 1
(Time.now.to_i - 1.day.ago.to_i) / 86400
>> 1
In the question's specific e...
In where shall I use isset() and !empty()
... This can be dangerous. Instead, use basic >, < and == operators and convert variables using intval() or floatval().
– kaleazy
Feb 14 at 18:08
add a comment
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C# Passing Function as Argument [duplicate]
...s mentioned above works but there are also delegates that do the same task and also define intent within the naming:
public delegate double MyFunction(double x);
public double Diff(double x, MyFunction f)
{
double h = 0.0000001;
return (f(x + h) - f(x)) / h;
}
public double MyFunctionMet...
Difference between await and ContinueWith
Can someone explain if await and ContinueWith are synonymous or not in the following example. I'm trying to use TPL for the first time and have been reading all the documentation, but don't understand the difference.
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How to get the current date and time
... From Date doc: As of JDK 1.1, the Calendar class should be used to convert between dates and time fields and the DateFormat class should be used to format and parse date strings.
– Paolo M
Aug 7 '13 at 14:06
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Finding differences between elements of a list
...cess is a method call in python
numpy.diff is slow because it has to first convert the list to a ndarray. Obviously if you start with an ndarray it will be much faster:
In [22]: arr = np.array(L)
In [23]: %timeit np.diff(arr)
100 loops, best of 3: 3.02 ms per loop
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