All Questions

3
answers

Web scraping with R

I'm trying to do a Web Scrapping of the following link: link I want to access all categories and extract a date frame with the name of all companies. If you click on the name of any of the companies will have some data like: Fancy na...
asked on 21.01.2016 / 13:28
1
answer

Is there a problem with using HTML5 attributes instead of jQuery or JavaScript?

Is there a security problem or something like using only attributes such as required in% with% s, among others instead of jQuery? Or is it just some option to use jQuery to customize the message only?     
asked on 16.12.2015 / 05:21
1
answer

Error getting version of Windows 10 with delphi

I'm trying to get the version of Windows 10 on my system, but the maximum it displays is Windows 8. Nor does it 8.1 it displays. I could not find the error. // Função Sistema Operacional function WinVersion: string; var VersionInfo: TOSVersi...
asked on 13.12.2015 / 14:07
1
answer

How to use the Scanner to capture input from the keyboard? [duplicate]

I would like to know how to use Scanner in java to simulate cin and cout of c ++     
asked on 17.02.2016 / 23:26
1
answer

How to restrict dates in MySQL and SQL Server?

I wonder if I can restrict certain dates in the database itself, not the code. For example, I have a table that records date of entry and date of exit. Here are some requirements. The date of entry can never be greater than the date of ex...
asked on 05.08.2016 / 14:55
1
answer

What is the Level Trust of an ASP.NET application?

What is the Level Trust setting for an ASP.NET application? Does it protect the server from anything? Does it protect the application from anything? In which case or for what reason is it recommended or necessary to change this setting?...
asked on 31.10.2016 / 18:23
2
answers

Doubt in recursive function

When I post: return n * fatqua(n-1) The program returns the expected result that is 24 . But when I post: return n * fatqua(--1) The result of the program is 0 . I can not understand the logic of this operation. Fol...
asked on 02.11.2016 / 17:17
1
answer

mysql function do not join the equals

I have this query for MySQL: SELECT email, COUNT(*) AS Vezes FROM automovel GROUP BY email HAVING COUNT(*) ORDER BY 'data_cadastro' ASC It groups all the emails together, and shows how many times they appear. I need to make it just show t...
asked on 08.11.2016 / 21:35
1
answer

Anyone know how to explain the process of generating an apk in React Native

I can not in any way generate an apk, I follow the steps of the documentation but soon I can not generate the keytool. Can anyone explain how it is generated?     
asked on 23.12.2016 / 16:05
1
answer

How to save what is typed on the screen in a variable

I have a web page, and sometimes users press some numbers. However, I have a usb reader, which when I read a code it automatically shows me 7 numbers, as if I had typed them on the webpage. How do I save these 7 numbers that are "typed" im...
asked on 19.12.2016 / 17:43