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Append an object to a list in R in amortized constant time, O(1)?
If I have some R list mylist , you can append an item obj to it like so:
17 Answers
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Schema for a multilanguage database
...8, 2))
CREATE TABLE T_PRODUCT_tr (pr_id INT FK, languagecode varchar, pr_name text, pr_descr text)
This way if you have multiple translatable column it would only require a single join to get it + since you are not autogenerating a translationid it may be easier to import items together with their ...
What's so bad about Template Haskell?
...fe, at all, thus going against much of "the spirit of Haskell." Here are some examples of this:
You have no control over what kind of Haskell AST a piece of TH code will generate, beyond where it will appear; you can have a value of type Exp, but you don't know if it is an expression that represen...
Move assignment operator and `if (this != &rhs)`
In the assignment operator of a class, you usually need to check if the object being assigned is the invoking object so you don't screw things up:
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What is TypeScript and why would I use it in place of JavaScript? [closed]
...aces. One of the big benefits is to enable IDEs to provide a richer environment for spotting common errors as you type the code.
To get an idea of what I mean, watch Microsoft's introductory video on the language.
For a large JavaScript project, adopting TypeScript might result in more robust soft...
Finding current executable's path without /proc/self/exe
It seems to me that Linux has it easy with /proc/self/exe. But I'd like to know if there is a convenient way to find the current application's directory in C/C++ with cross-platform interfaces. I've seen some projects mucking around with argv[0], but it doesn't seem entirely reliable.
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What's the difference between passing by reference vs. passing by value?
... tend to use a different (but similar) pair of techniques to achieve the same effects (see below) which is the primary source of confusion.
A secondary source of confusion is the fact that in "pass by reference", "reference" has a narrower meaning than the general term "reference" (because the phra...
How do I return the response from an asynchronous call?
...solutions below.
The problem
The A in Ajax stands for asynchronous . That means sending the request (or rather receiving the response) is taken out of the normal execution flow. In your example, $.ajax returns immediately and the next statement, return result;, is executed before the function you p...
The static keyword and its various uses in C++
The keyword static is one which has several meanings in C++ that I find very confusing and I can never bend my mind around how its actually supposed to work.
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When to use volatile with multi threading?
...dated correctly.
However two threads both accessing a shared variable is something which calls for protection via a mutex isn't it?
But in that case, between the thread locking and releasing the mutex the code is in a critical section where only that one thread can access the variable, in which cas...