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Why are there two kinds of functions in Elixir?
...t differently and I am going to illustrate why they work like that.
Let's start with the second, fn. fn is a closure, similar to a lambda in Ruby. We can create it as follows:
x = 1
fun = fn y -> x + y end
fun.(2) #=> 3
A function can have multiple clauses too:
x = 1
fun = fn
y when y &...
What is a higher kinded type in Scala?
...
Let me make up for starting some of this confusion by pitching in with some disambiguation. I like to use the analogy to the value level to explain this, as people tend to be more familiar with it.
A type constructor is a type that you can ap...
How does RegexOptions.Compiled work?
...c)
{
// warmup
func();
var watch = new Stopwatch();
watch.Start();
for (int i = 0; i < times; i++)
{
func();
}
watch.Stop();
Console.Write(description);
Console.WriteLine(" Time Elapsed {0} ms", watch.ElapsedMilliseconds);
}
static void Main(strin...
Is it better to use std::memcpy() or std::copy() in terms to performance?
... so I'm guessing there was some sort of OS activity going on. I decided to start over.
Same compiler settings and flags. There is only one version of MD5, and it's faster than SHA-2, so I did 3000 loops on a similar set of 5 test strings.
These are my final 10 results:
Time (in seconds) to comple...
What is the difference between sigaction and signal?
...g/onlinepubs/009695399/functions/signal.html#tag_03_690_07
Whether you're starting from scratch or modifying an old program, sigaction should be the right option.
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What is DOM Event delegation?
...ters phase 2 (target) on the target itself, then enters phase 3 (bubbling) starting on the parent of the target. Nowhere does it reach a child of the target.
– Crescent Fresh
Apr 12 '17 at 15:01
...
How to “warm-up” Entity Framework? When does it get “cold”?
..., so you may want to force compilation of these queries during application startup.
Pregenerating views is the other possibility as you mention. Especially, for those queries that take very long to compile and that don't change. That way you move the performance overhead from runtime to compile tim...
Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
...
There's a dynamic programming solution. We start off knowing 0 keys can make us 0 A's. Then we iterate through for i up to n, doing two things: pressing A once and pressing select all + copy followed by paste j times (actually j-i-1 below; note the trick here: the con...
How does lucene index documents?
... for the sake of finding the most up-to-date results first, would a search start by looking at the newest segments? So just to clarify - suppose a document is updated. The older version of the document is added to the kill list, then any matches that are found in older segments are removed from th...
What does the thread_local mean in C++11?
...that each thread has a separate copy of the object. The object's life time starts either at thread start (for global variables) or at first initialization (for block-local statics), and ends when the thread ends (i.e. when join() is called).
Consequently, only variables that could also be declared ...