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When should TaskCompletionSource be used?
AFAIK, all it knows is that at some point, its SetResult or SetException method is being called to complete the Task<T> exposed through its Task property.
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What does @@variable mean in Ruby?
...the classes; setting the value in an instance of one changes the value for all other instances of that class and even child classes, where a variable named @shared, with one @, would not be.
[Update]
As Phrogz mentions in the comments, it's a common idiom in Ruby to track class-level data with an ...
SELECT * FROM X WHERE id IN (…) with Dapper ORM
...
Directly from the GitHub project homepage:
Dapper allow you to pass in IEnumerable and will automatically parameterize your query.
connection.Query<int>(
@"select *
from (select 1 as Id union all select 2 union all select 3) as X
where Id in @Ids", ...
Finding the number of days between two dates
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What about leap seconds? Not all days have exactly 24*60*60 seconds. This code might be sufficient for practical purposes but it's not exact in sone extremely rare edge cases.
– Benjamin Brizzi
Aug 1 '12 at 8:15
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Why is it necessary to set the prototype constructor?
...};
// define the Student class
function Student(name) {
Person.call(this, name);
}
// inherit Person
Student.prototype = Object.create(Person.prototype);
Now what happens when we create a new Student and copy it?
var student1 = new Student("trinth");
console.log(student1....
Input type=password, don't let browser remember the password
...pped support for this attribute. See Is autocomplete="off" compatible with all modern browsers?
This is arguably something that should be left up to the user rather than the web site designer.
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Design Patterns web based applications [closed]
... harder to implement. But you end up with a simpler model and view wherein all the "raw" Servlet API is abstracted completely away. You shouldn't have the need to gather, convert and validate the request parameters yourself. The Controller does this task and sets the gathered, converted and validate...
What are MVP and MVC and what is the difference?
... many tools encourage you are likely to come across three design patterns called Model-View-Controller , Model-View-Presenter and Model-View-ViewModel . My question has three parts to it:
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Removing whitespace between HTML elements when using line breaks
...0 in width, and the images won't be affected.
Don't know if this works in all browsers, but I tried it with Chromium and some <li> elements with display: inline-block;.
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How do I return the response from an asynchronous call?
...nt, return result;, is executed before the function you passed as success callback was even called.
Here is an analogy which hopefully makes the difference between synchronous and asynchronous flow clearer:
Synchronous
Imagine you make a phone call to a friend and ask him to look something up for yo...