All Questions

1
answer

How does the meet-in-the-middle attack work?

I was looking for the old 3DES and I decided to search because there is no 2DES, I found little information, even because 2DES did not actually exist. Although it is also abbreviated as MITM, it has no relation to Man-in-the-middle , common...
asked on 31.07.2017 / 22:15
1
answer

How to create loop to issue an event in socket.io?

I have an architecture problem. I have a code using socket.io at nodejs : socket.on('images',function (aData){ ... socket.sockets.emit('show', JSON.stringify({imagens : json})) }); I'm trying to broadcast a broadcast from tim...
asked on 20.01.2014 / 11:16
1
answer

Is it possible to send messages from one WebWorker to another WebWorker?

I have a page where I want to use a set of WebWorkers to perform tasks in the background. Each WebWorker has a specific function, but potentially useful to others. It is simple to receive / send messages to and from a WebWorker created by the p...
asked on 11.12.2013 / 23:28
1
answer

filter in dplyr using a categorical variable

Suppose I have the following dataset: set.seed(12) dados <- data.frame(grupos=rep(letters[1:5], 5), valores=rnorm(25)) head(dados) grupos valores 1 a -1.8323176 2 b -0.0560389 3 c 0.6692396 4 d 0.8067977 5 e...
asked on 08.06.2017 / 18:15
1
answer

Nav-bar responsive at the Foundation?

I'm giving maintenance to a site that was made with Foundation, and I really do not know anything about this framework, because I only work with Bootsrap. I already looked in the Foundation documentation but found nothing that solved my probl...
asked on 09.01.2014 / 22:35
1
answer

How important is it really to validate codes by the W3C?

I understand that validating the code can be important and especially help those who are starting to correct errors and become more informed about obsolete elements in current versions of the languages. But how much should I worry about valid...
asked on 24.10.2017 / 15:05
4
answers

How to get the current location of the android device?

I'm developing an android application that needs to get the current location of the device (Latitude, Longitude) and use this data in google maps ... how can I do this? If you help me get only the latitude and longitude coordinates, it will be a...
asked on 21.04.2016 / 15:58
3
answers

Upload post without refresh of page with AJAX and JQUERY

I need help with Wordpress because I would like to load posts without refresh or reload of the page. I have a menu that returns posts of a certain category in a <div> to the left and I would like to be able to l...
asked on 18.02.2014 / 16:09
1
answer

What is the meaning of the acronyms SISD, SIMD, MISD, MIMD? What is your relationship with programming?

In some answers and questions I see citations to these acronyms. They are usually embedded in the following table: | Single data | Multiple data Single instruction | SISD | SIMD Multiple instruction | MISD...
asked on 21.11.2017 / 15:27
1
answer

How can I convert DOC and DOCX to TXT with PHP?

I have a system where the files the client is going to send me are all in file DOC or DOCX . However, you may want to download this document in TXT format. Is there any simple way to convert DOC or DOCX to...
asked on 20.11.2015 / 12:05