All Questions

1
answer

Deploy App Node.js on localhost (Production)

I developed an application with Angular + Node.js. The only detail is that there is no centralized server (Node.js), that is, each client will have its version of the server running on your network. Because of this, I had to create ways to i...
asked on 27.02.2017 / 14:14
1
answer

ReportViewer MVC Core

I'm working on a project using ASP.NET MVC Core. I have installed all the dependencies required for the use, but it is not able to be used in my application. However, if I create a new MVC5 application it is enabled and installed. Has anyo...
asked on 18.04.2017 / 20:47
1
answer

What does a double-precision variable mean?

I would like to understand the meaning of a double-precision variable.     
asked on 15.01.2017 / 16:35
2
answers

What is a lock and what are its causes?

I often come across the term: Table x is with lock . What does it mean and what are its causes?     
asked on 19.04.2017 / 21:38
1
answer

Why use private?

I'm learning variables public and private . If I create all the program code, what is the need to create a private variable? Being that enough I do not program a code that accesses the same one of another class. While r...
asked on 14.11.2016 / 21:26
2
answers

How do I return the words that appear the most in a column?

I have this table below which has two columns, being id and description : CREATE TABLE myBigTable ( id INT(11) AUTO_INCREMENT PRIMARY KEY, description TEXT NOT NULL ) After inserting some records, I made a simple selec...
asked on 07.03.2017 / 23:00
1
answer

Extract information from lattes

Introduction Brazilian researchers have, since 1999, a website where they can post information about their academic career. This information is known as Currículos Lattes . I want to download a few thousand of these resumes and write, along...
asked on 18.04.2018 / 17:32
1
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Check string Regex C #

I have a string that can only be composed of X uppercase and - . Example: X-XX-XX or X-X-X-XX-XXX . Where every - would count one group and each X one digit. Example 1: The string X-XX-XX has 3 g...
asked on 20.12.2016 / 19:57
1
answer

What are the correct practices for manipulating events in PHP?

I've created some classes and an interface to handle events for a small MVC application. My intention is to implement the Observer pattern, but I do not know if you agree, since I still confuse it with PHP. In the following code, did I do it the...
asked on 30.12.2013 / 01:38
1
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Add row by row in a data.table in R

Is there any method that can be added row by row in a data.table in R without needing to use a 'for', so that the value of the next row in a column is the value of the previous row added with a different value for each line? Trying to solve a...
asked on 25.06.2017 / 09:03