All Questions

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R: Error in bind_rows_ (x, .id), Argument 111 when combining dataframes

I am using R version 3.4.3. I have two data.frames of different sizes with some common columns and others not. I want to combine both data frames keeping the different columns so that NAs appear in the part of the data frame where that column wa...
asked on 04.04.2018 / 08:53
1
answer

Migraciones assign value by Default

I am working on a project with C #, Entity Framework and MySQL.  I wanted to know if you could help me with a "problem" I'm having with migrations. I was working with MySQL version 5.6 and go to version 5.7, the problem (if you can say problem)...
asked on 18.04.2018 / 15:55
1
answer

call a function in the laravel login

I'm working with Laravel 5.5 and I want to call a function every time a user logs in and is authenticated in laravel, I've been searching and can not find anything. and the final question is Do you call a function in laravel when it is logged in...
asked on 13.04.2018 / 17:01
2
answers

Change attributes of a table

I have the following code and what I want it to do is that by giving the image the id of that tr in concrete and all textBox become enable ... I've tried it with document.getElementById("name").disabled = false; .....
asked on 17.04.2018 / 09:55
1
answer

Doubt with Operator Overload Exercise + and -

The exercise asks me to implement the addition and subtraction each with a single member method. And you have to be able to execute the following code: int main() { Punto p(12.34,-56.78); Punto r,s;...
asked on 15.04.2018 / 19:05
1
answer

How to define the width of a table and its th? so they look the same in Google Chrome and Firefox

I'm doing a project where I show different tables and I want to define the width of the tables and their th, in Google Chrome it works correctly but when I try it in Firefox I do not take into account the width of the table <link rel=...
asked on 02.04.2018 / 18:10
1
answer

Fill rows with missing dates in DataFrame

I am working with some data from a meteorological station in which the data is distributed by columns in day with 24 hours, predominant direction, wind direction in degrees The problem is that there are days, even full months, that do not com...
asked on 16.04.2018 / 19:25
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Assign view to SQL Server User

Hello friends, I need you to help me with a problem I have. I have 2 databases (b1, b2) where from b2 I created a view (sales) that comes out of b1, which works correctly; I need to create a user that can access that view and nothing else....
asked on 18.04.2018 / 15:18
1
answer

Does Java have a default constructor?

In a book called "Java in depth" it was specified that when creating a class in Java it was a default constructor. But, in a question from the Android App SoloLearn it appeared that the default constructors in Java do not exist. Which of the 2 i...
asked on 16.04.2018 / 16:03
1
answer

Reading and Writing binary file of 7 GBytes

How can I read and write a binary file of more than 7 GBytes? The assign (f, 'xx' and the reset (f) work but when I am going to start the file path, the function eof (f) does not work properly, I understand that it is because the TFileRec str...
asked on 28.11.2018 / 21:46