using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Ejercicio_2
{
class Program
{
enum direcion { arriba=1,abajo=3,derecha=2,izquieda=4};
static void Main(stri...
I need to do a SELECT in PHP where X records are randomly selected. So I'm using the ORDER BY RAND() method, but I need the LIMIT to be one or the other depending on a variable, that is, something like this:
$sql = "SELECT...
I'm designing a C ++ program with a dynamic stack but when I extract the data I want it to be inverted, they can help me.
This is my code:
#include <iostream>
using namespace std;
#define true 1
#define false 0
struct docentes{...
I'm trying to use firebase for background notifications.
but it does not detect FirebaseMessagingService attempt extends of this and it tells me:
can not resolve
in the gradle I have
dependencies {
cla...
Hello, I am making a request to searchRand.php, in the php I make a query to obtain data. And I save it in the $ to_return variable. But when returning the value of $ to_return does not return anything. Being in the php command print the variabl...
I need to search in a database like this, where "id" is the variable with autoincrement:
id device
6 1
5 1
4 2
3 2
2 1
1 1
I need to sort by "device" but it gave me when "id" is minimal, I need to group w...
I wanted to launch the commands:
ionic build android
or
ionic run android --device
But he always throws me this eror:
Error: Requirements check failed for JDK 1.8 or greater
The version of java I have is 1.8.0_111, I have the env...
Should the metatags be put with or without an accent?
That is, like this:
<meta name="keywords" content="camión, árbol, lápiz"/>
Or so?
<meta name="keywords" content="camion, arbol, lapiz"/>
My doubt really is i...