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How to create the most compact mapping n → isprime(n) up to a limit N?
Naturally, for bool isprime(number) there would be a data structure I could query.
I define the best algorithm , to be the algorithm that produces a data structure with lowest memory consumption for the range (1, N], where N is a constant.
Just an example of what I am looking for: I could rep...
Postgres and Indexes on Foreign Keys and Primary Keys
...le, you will have an index on the PK and probably don't need to create any extra indexes.
While it's usually a good idea to create an index on (or including) your referencing-side foreign key columns, it isn't required. Each index you add slows DML operations down slightly, so you pay a performance...
Why does pattern matching in Scala not work with variables?
...ckticks.
Both of these would be solutions to your problem:
def mMatch(s: String) = {
val target: String = "a"
s match {
case `target` => println("It was" + target)
case _ => println("It was something else")
}
}
def mMatch2(s: String) = {
val Target: String = ...
How to construct a std::string from a std::vector?
Short of (the obvious) building a C style string first then using that to create a std::string, is there a quicker/alternative/"better" way to initialize a string from a vector of chars?
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Is leaked memory freed up when the program exits?
...t space is given back to the system wholesale, right? I don't see why the extra bookkeeping would be necessary, since the process making the allocations is the only process (in userland) with access to those pages anyway. Or have I been mis-taught?
– Chris Tonkinson
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Bash script processing limited number of commands in parallel
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Great to use for small containers, as no extra packages/dependencies are needed!
– Marco Roy
Sep 5 '19 at 0:36
1
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wait() or sleep() function in jquery?
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There is an function, but it's extra:
http://docs.jquery.com/Cookbook/wait
This little snippet allows you to wait:
$.fn.wait = function(time, type) {
time = time || 1000;
type = type || "fx";
return this.queue(type, function() {
var s...
How to prepend a string to a column value in MySQL?
...QL update statement for updating a particular field of all the rows with a string "test" to be added in the front of the existing value.
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Functional, Declarative, and Imperative Programming [closed]
...ions. in short - that functions are as flexible and common as things like strings and numbers.
it might seem odd, then, that functional, imperative and declarative are often mentioned together. the reason for this is a consequence of taking the idea of functional programming "to the extreme". a ...
Running single test from unittest.TestCase via command line
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Just noticed that this works only if the method is called "test*", so unfortunately it cannot be used to occasionally run test that is "disabled" by rename
– Alois Mahdal
Apr 15 '13 at 12:29
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