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What is an existential type?
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When someone defines a universal type ∀X they're saying: You can plug in whatever type you want, I don't need to know anything about the type to do my job, I'll only refer to it opaquely as X.
When someone defines an existential ty...
Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?
...ing a MOV shifts the subsequent instructions to different memory addresses
one of those moved instructions was an important conditional branch
that branch was being incorrectly predicted due to aliasing in the branch prediction table
moving the branch eliminated the alias and allowed the branch to b...
How is malloc() implemented internally? [duplicate]
Can anyone explain how malloc() works internally?
3 Answers
3
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ViewBag, ViewData and TempData
...apper around ViewData and exists only in ASP.NET MVC 3.
This being said, none of those two constructs should ever be used. You should use view models and strongly typed views. So the correct pattern is the following:
View model:
public class MyViewModel
{
public string Foo { get; set; }
}
A...
How to design a product table for many kinds of product where each product has many parameters
I do not have much experience in table design. My goal is to create one or more product tables that meet the requirements below:
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Generating v5 UUID. What is name and namespace?
...l hash or MAC.
Suppose you have a (key,value) store, but it only supports one namespace. You can generate a large number of distinct logical namespaces using type 3 or type 5 UUIDs. First, create a root UUID for each namespace. This could be a type 1 (host+timestamp) or type 4 (random) UUID so long...
What are important languages to learn to understand different approaches and concepts? [closed]
...ype systems, but do you have experience with "skinnable* type systems? No one has... but they should. Qi is like Lisp in many ways, but its type system will blow your mind.
Actors+Fault-tolerance, Erlang - Erlang's process model gets a lot of the buzz, but its fault-tolerance and hot-code-swappin...
What is the difference between JOIN and JOIN FETCH when using JPA and Hibernate
... two queries, you are using JOIN to query all employees that have at least one department associated.
But, the difference is: in the first query you are returning only the Employes for the Hibernate. In the second query, you are returning the Employes and all Departments associated.
So, if you us...
What's the best way to develop a sideswipe menu like the one in Facebook's new iOS app?
...ore common interface element as more information gets crammed into each iPhone app. Facebook has included it in their latest version and the new Gmail app appears to include it as well . I was wondering if anybody had thoughts on the most efficient way of developing something like this as it's be...
Using two CSS classes on one element [duplicate]
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If you want two classes on one element, do it this way:
<div class="social first"></div>
Reference it in css like so:
.social.first {}
Example:
https://jsfiddle.net/tybro0103/covbtpaq/
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