Questions tagged as 'poo'

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Data view php mysqli

I have a problem showing the data in the view, I mean, I have a data modification form, which edit and update the data in the database without problems, but when I return to the view to show all the data data of the table, it does not show me an...
asked by 10.09.2018 / 04:33
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Show properties of an object in javascript

I am working on an application that has an object called SessionContext, this object has session variables that are sometimes persistent, inside the application (I did not do it myself) there are many get and Set for example: var ctx = new Ses...
asked by 15.08.2018 / 04:47
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Are the Attributes "Necessary"?

Programmers, I have a question emerging, but quite elementary. In OOP, we can assign a series of attributes to our classes to mold objects to convenience, understanding this, is it necessary to create variables separately? Or is it enough to ass...
asked by 15.07.2018 / 00:12
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How to rerun an sql statement using ajax?

I have a question as to how I can rerun the sql statement again, when sending the form via ajax. Here is the code of the sentence that is executed $conexion = $this->conectar(); $sql = "SELECT * FROM usuarios WHERE usuario = ? A...
asked by 03.07.2018 / 04:22
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How to get the hash value of a raw image?

I'm working with a json that has this attribute "ImageHashValueRAW": "7aa7f94d221d2afb658dba986f328d419c892511719acc8a4742f4eda2f766a4" I have an array of bytes [] called imageData. How can I get or remove the hash value from a byte array?...
asked by 28.06.2018 / 01:37
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Why is it null? Java heritage

public class PracticaHerenciaSimple { public static void main(String[] args) { System.out.println("** CLASE PADRE VEHICULO **"); Vehiculo vehiculo = new Vehiculo() {};// constructor por defecto creado por el compilador...
asked by 23.06.2018 / 03:55
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Shared lists in instances of classes (objects) [duplicated]

I have the following code class Num(object): i = list() def __init__(self): pass def imp(self): print(self.__i) def add(self, n): self.__i.append(n) from Num import * n1 = Num() n2 = Num() n1....
asked by 20.06.2018 / 08:07
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Function attribute within a class

I'm trying to use the Gmail API, and for now I'm on the right track, now I'm trying to make the execution of the program a little more orderly by adding conditional etc ... It turns out that I have the following problem: I have a class called...
asked by 04.06.2018 / 21:25
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Calculation predecessor of a node

First I will explain the code so that the answers can be precise. The ancestor of a node is defined as the minimum difference between the node from which you want to calculate the ancestor and the other nodes of the tree. Launcher method...
asked by 25.05.2018 / 22:03
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Game of life ERROR

I'm doing a somewhat simple code of Conway's famous "Game of Life", this is the creation of the arrangement public class FunInicio { public int [][] llenado() { int [][] you = new int [10][10]; for (int i=0; i<y...
asked by 23.05.2018 / 10:31