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How to get the difference between two arrays in JavaScript?
...rr_diff (a1, a2) {
var a = [], diff = [];
for (var i = 0; i < a1.length; i++) {
a[a1[i]] = true;
}
for (var i = 0; i < a2.length; i++) {
if (a[a2[i]]) {
delete a[a2[i]];
} else {
a[a2[i]] = true;
}
}
...
Open directory dialog
...
You can use the built-in FolderBrowserDialog class for this. Don't mind that it's in the System.Windows.Forms namespace.
using (var dialog = new System.Windows.Forms.FolderBrowserDialog())
{
System.Windows.Forms.DialogResult result = dialo...
Globally catch exceptions in a WPF application?
...rue, where e is an DispatcherUnhandledExceptionEventArgs, to skip the default handler which quit the programs. msdn.microsoft.com/en-us/library/…
– Piti Ongmongkolkul
Jul 9 '13 at 13:49
...
What is DOCTYPE?
...rent "standards compliant" rendering DOCTYPEs, such as the HTML5 DOCTYPE (<!DOCTYPE html>, prior to HTML5, only known as the "skinny doctype" which does not trigger standardized rendering in older browsers) and other DOCTYPEs such as this one for HTML 4.01 transitional:
<!DOCTYPE HTML PUBL...
Install npm module from gitlab private repository
...ername/Repository#{branch|tag}
With HTTPS and deploy token
git+https://<token-name>:<token>@gitlab.com/Username/Repository#{branch|tag}
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...
Hidden features of Ruby
...l, which means Proc objects can be used in case statements like so:
def multiple_of(factor)
Proc.new{|product| product.modulo(factor).zero?}
end
case number
when multiple_of(3)
puts "Multiple of 3"
when multiple_of(7)
puts "Multiple of 7"
end
...
Setting unique Constraint with fluent API?
....com/aspnet/EntityFramework6/issues/274
Example
modelBuilder
.Entity<User>()
.HasIndex(u => u.Email)
.IsUnique();
On EF6.1 onwards, you can use IndexAnnotation() to add indexes for migration in your fluent API.
http://msdn.microsoft.com/en-us/data/jj591617.aspx#Property...
Using Moq to mock an asynchronous method for a unit test
...However, don't just start the task - instead, change to using Task.FromResult<TResult> which will give you a task which has already completed:
...
.Returns(Task.FromResult(new HttpResponseMessage(System.Net.HttpStatusCode.OK)));
Note that you won't be testing the actual asynchrony this way ...
What does default(object); do in C#?
...For a reference-type, it returns null
For a value-type other than Nullable<T> it returns a zero-initialized value
For Nullable<T> it returns the empty (pseudo-null) value (actually, this is a re-statement of the first bullet, but it is worth making it explicit)
The biggest use of defau...
CSS transition shorthand with multiple properties?
... seem to find the correct syntax for the CSS transition shorthand with multiple properties. This doesn't do anything:
6 A...