All Questions

2
answers

Could anyone help me with this formal language?

Could someone help me with the following language: {a^n b^m | n<= m <= 2n} Sorry for ignorance, but I can not form a stack automaton with this language. I'm trying through a deterministic stack automaton but nothing comes out.     
asked on 30.05.2017 / 00:12
3
answers

Customize the browser message to a "required"

With the attribute required , for example, in a field of type text , the browser will present a balloon to the user to realize that this field is required and should be filled in. The problem starts with the message itself bei...
asked on 06.03.2014 / 17:31
2
answers

Difference between _blank / _self and blank / self

I would like to know if there is any recommendation on using the target Html attributes with or without _ before the value, I see that it's kind of standard to use it with _ , but if it is missing the redirection also works: &...
asked on 13.12.2018 / 19:12
6
answers

How do I get the current date and add "n" minutes to this value?

I can get the current date simply with new Date() , but how do I add a few minutes to this value? If there is a way to add milliseconds, it can be too.     
asked on 29.01.2014 / 17:00
6
answers

How to select all "empty"

Is there any way to select all the empty elements of a page? For some reason that I can not explain, the code below does not select inputs without text on my page: $("input[value=''], select[value=''], textarea[value='']"); I know I can...
asked on 25.02.2014 / 19:29
2
answers

Send sms from a mobile device via HTML5 / javascript

I am creating a mobile WEB application that will be downloaded in one of the store's, with an integrated mini WEB server that works on any operating system (iOS, android, windows8, etc). In order for the application to be as independent as po...
asked on 09.04.2014 / 19:28
4
answers

Remove element from an ArrayList in Java

I'm having trouble removing an element from my ArrayList, can anyone help me how? public String remover(Pessoa umaPessoa) { String mensagem = "\n******** Pessoa removida com Sucesso! ********\n"; listaPessoas.remove(umaPessoa)...
asked on 05.04.2014 / 01:53
5
answers

Distribute li list in two columns

I'm trying to create a list with 4 blocks, but they are not aligned side-by-side correctly, look like this: Iwouldlikeittolooklikethis: HTML: <li></li> <li></li> <li></li> <li></li> CSS...
asked on 03.12.2014 / 04:31
2
answers

Algorithm in C to convert arabic number to roman number

How to do this conversion? It does not have to be the algorithm ready, I wanted a help at least in logic.     
asked on 26.05.2014 / 00:41
1
answer

How to reverse engineer an android application?

As an android application in the .apk extension, get the classes, layouts, libraries, etc., ie reverse engineering? Note: I used 7-zip as Bacco advised and resulted in the following files folder: The classes appear in this extension ....
asked on 04.10.2014 / 20:47