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Difference between Lookup() and Dictionary(Of list())
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Jon SkeetJon Skeet
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Maven is not working in Java 8 when Javadoc tags are incomplete
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The best solution would be to fix the javadoc errors. If for some reason that is not possible (ie: auto generated source code) then yo...
shortcut for creating a Map from a List in groovy?
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I've recently came across the need to do exactly that: converting a list into a map. This questi...
vim command to restructure/force text to 80 columns
...tomatically set the width of text in vim using set textwidth (like Vim 80 column layout concerns ). What I am looking for is something similar to = (the indent line command) but to wrap to 80. The use case is sometimes you edit text with textwidth and after joining lines or deleting/adding text...
What does @synchronized() do as a singleton method in objective C?
...dit: Adding some more information that wasn't in the original answer from 2011.
The @synchronized directive prevents multiple threads from entering any region of code that is protected by a @synchronized directive referring to the same object. The object passed to the @synchronized directive is the...
Create Django model or update if exists
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bakkalbakkal
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add a c...
EF Code First: How do I see 'EntityValidationErrors' property from the nuget package console?
...(var failure in ex.EntityValidationErrors) {
sb.AppendFormat("{0} failed validation\n", failure.Entry.Entity.GetType());
foreach (var error in failure.ValidationErrors) {
sb.AppendFormat("- {0} : {1}", error.PropertyName, error.ErrorMessage);
s...
Asynchronous Process inside a javascript for loop [duplicate]
... maintain the index uniquely for you (second example shown below).
As of 2016, if you have a fully up-to-spec ES6 implementation of Javascript, you can also use let to define the for loop variable and it will be uniquely defined for each iteration of the for loop (third implementation below). But,...
How to create a unique index on a NULL column?
I am using SQL Server 2005. I want to constrain the values in a column to be unique, while allowing NULLS.
4 Answers
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vs in Generics
...iance in generic interfaces was added to C# and VB.NET (in .NET 4 with VS 2010), this was a compile time error.
After .NET 4, IEnumerable<T> was marked covariant, and became IEnumerable<out T>. Since IEnumerable<out T> only uses the elements within it, and never adds/changes them...