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Difference between Covariance & Contra-variance
...and I rephrased following examples.
What does “consistency” mean? The idea is to design type-safe type hierarchies with highly substitutable types. The key to get this consistency is sub type based conformance, if you work in a statically typed language. (We'll discuss the Liskov Substitution P...
What is the difference between the kernel space and the user space?
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@roottraveller: I'm not sure what gave you that idea, but no, not at all. At the same time, a user-space process will normally have some (more or less hidden) kernel-space memory, so (for example) your process will have a user-space stack, and a kernel-space stack that's u...
How do you create a dictionary in Java? [closed]
...ithout it: add context around the link so your fellow users will have some idea what it is and why it’s there, then quote the most relevant part of the page you're linking to in case the target page is unavailable. Answers that are little more than a link may be deleted.
– Fe...
Read/write files within a Linux kernel module
...you should avoid file I/O from within Linux kernel when possible. The main idea is to go "one level deeper" and call VFS level functions instead of the syscall handler directly:
Includes:
#include <linux/fs.h>
#include <asm/segment.h>
#include <asm/uaccess.h>
#include <linux/b...
Why would one use the Publish/Subscribe pattern (in JS/jQuery)?
...lication. You can reuse it in different applications, so it’s not a good idea to couple it with the View of a single application, where you want to show it, because usually in the different applications you have different views. So it’s a good idea to use publish/subscribe for the Model-View com...
How to add include path in Qt Creator?
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Using absolute file paths is a very bad idea. Always try to use relative file path system. QT is designed for being cross platform. And if you compile same code on a Linux machine, the compiler will fail to find those file names like C:\ Moreover, even if you rena...
Javascript roundoff number to nearest 0.5
Can someone give me an idea how can i round off a number to the nearest 0.5.
I have to scale elements in a web page according to screen resolution and for that i can only assign font size in pts to 1, 1.5 or 2 and onwards etc.
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How to comment lines in rails html.erb files? [duplicate]
... first off, no need for the then. Second, this completely destroy the idea behind MVC. Keep your logic in a helper or in your controller. -1
– davegson
Nov 8 '14 at 9:59
1
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How to concatenate strings in twig
...(eg: {{ 'test_' ~ name | trans }} won't translate my items. Do you have an idea how to do that? thx!
– guillaumepotier
Jan 8 '12 at 14:21
12
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Case objects vs Enumerations in Scala
... patterns.
To start, let's make sure we are working from the same basic idea of what an enumeration is. Let's define an enumeration mostly in terms of the Enum provided as of Java 5 (1.5):
It contains a naturally ordered closed set of named members
There is a fixed number of members
Membe...