All Questions

3
answers

How to go from an Activity "A" to an Activity "B" to select data and return to Activity "A" without the editText of Activity "A" being erased?

I have the need in an "Activity A" to call an "Activity B" to select data and send it to the "Activity A", but in the "Activity A" I have 10 edit text that when making those transitions with intents they are deleted, and I do not want to pass al...
asked on 20.06.2018 / 22:51
1
answer

Commit tran in SQL

I have doubts that my SP is correct since I do not know if it should be used only once begin try and those instructions, apart it returns a 1 but does not do update : ALTER PROCEDURE [dbo].[SP_EliminarVariableFormula] @IdVaria...
asked on 21.05.2018 / 21:14
2
answers

Function of javaScrip does not work the second time I click

I'm starting in web development, but I have a small inconvenience, I have a small scrip that returns the system date by clicking on a button but by erasing the data from the text box where it rests and click a second time to return to bring the...
asked on 29.06.2018 / 12:29
2
answers

Convert a string from an array to an array type in PHP

In short, I have something like this: $variable = "[{"id":1, "nombre":"Juan"},{"id":2, "nombre":"Manuel"}]" As you can see, it's a string and I want to pass it to an array, the goal is to be something like: $variable = [ ['id' => 1...
asked on 24.06.2018 / 23:22
1
answer

Differences between Seed, migrations and factories?

I am learning Laravel, but it causes me conflict to understand some things about the subject. As I understood the migrations are a kind of control of versions of the database with OOP Seeds are used to create test data. And the factorie...
asked on 23.05.2018 / 00:54
2
answers

How to validate if a text field is numeric in Java?

How to validate if a text field is numeric in Java? I have validations for textfields that receive Strings, and it warns me when it's empty. boolean Valida(){ if(txtRFC.getText().equals("")){ javax.swing.JOptionPane.showMessageDial...
asked on 06.06.2018 / 22:46
1
answer

Operator overhead + c ++

I'm trying to create an operator overload +: Racional Racional::operator+(const Racional& r) { Racional resultado; resultado.m_numerador = r.m_numerador + m_numerador; resultado.m_denominador = r.m_denominador + m_denominador...
asked on 19.09.2018 / 14:31
1
answer

Perform operation when detecting the change in a QtableWidget item

I have a QTableWidget , of 3x5 in the item (5, 5) I do the sum of the number that enter inside the item (1,2) and (1,3). Currently I need the user to click on a update button to be able to perform the update but I would like to know i...
asked on 01.09.2018 / 20:42
1
answer

Create variable that can be passed from one Windows Form to another and return it to the Main Form

Good morning, I am working as Windows Forms and user controls within C #, which I am working with an application that acts as a clock watch. This first screen acts, like the main screen. Which all users have access to now. Pressin...
asked on 27.08.2018 / 18:29
2
answers

Avoid memory leakage C #

I have a class to make a tree that can be traversed up and down, with reference to the parent node, something like this: public class Nodo { protected List<Nodo> Hijos... public Nodo Padre.... public void Add(Nodo nodo) { n...
asked on 19.09.2018 / 18:23