simultaneous | 易学教程

How to simultaneous read keys on keyboard? [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . My question behave to my children age, when I got a new game to play, and was very impressed. The game was able to see and react to more than 4,6 sometimes 8 keys pressed at same time. How is this possible? There is a limit for this? Or if I press "a,s,d,f,u,v,shift,0,uparrow,rightcltr,return and backspace" all

Android 4.3: How to connect to multiple Bluetooth Low Energy devices?

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问题 Task: I am developing an Android application that will need to simultaneously connect to multiple (identical, that can be differentiated via their ID) BLE chip devices in order to send and receive updates. I have used the tutorials on Google's official web page: http://developer.android.com/guide/topics/connectivity/bluetooth-le.html This has helped me to create a DeviceScanActivity Java class that allows me to scan for and list all of the available BLE devices in close proximity, similarly

How do I open an array of files in Perl?

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In perl, I read in files from a directory, and I want to open them all simultaneously (but line by line) so that I can perform a function that uses all of their nth lines together (e.g. concatenation). my $text = `ls | grep ".txt"`; my @temps = split(/\n/,$text); my @files; for my $i (0..$#temps) { my $file; open($file,"<",$temps[$i]); push(@files,$file); } my $concat; for my $i (0..$#files) { my @blah = <$files[$i]>; $concat.=$blah; } print $concat; I just a bunch of errors, use of uninitialized value, and GLOB(..) errors. So how can I make this work? A lot of issues. Starting with call to

Android: Simultaneous button presses

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I've seen this with other platforms (especially iPhone/iPad) but have not been able to find-it/figure-it-out for Android and the other platforms don't seem to get much farther then asking the question. I have a game that has a multiplayer component where two players have to press buttons on the same screen at the same time. Everything but simultaneous button presses is done. As of right now it seems like Android calls the button's onTouchEvent and, since it is handled, it doesn't call the other button. Do you think something like having it call both buttons (if a touch is within the area of

which(vector1 < vector2)

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问题 Let's make a small example first, that computes in R: x<- c(1,3,1,4,2) max(which(x<2)) [1] 3 Now, I would like to do this not just for one value 2, but for many values simultaneously. It should give me something like that: max(which(x<c(1,2,3,4,5,6))) [1] NA 3 5 5 5 5 Of course I could run a for loop, but that is very slow: for(i in c(1,2,3,4,5,6)){ test[i]<-max(which(x<i)) } Is there a fast way to do this? 回答1: Find the max index of each value seen in x : xvals <- unique(x) xmaxindx <-

Does OpenSSL allow multiple SSL_CTX per process, one SSL_CTX used for server sessions and the other SSL_CTX for client sessions?

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问题 I have a Linux process that needs to act as an SSL server (accept and service connections from other clients) but also needs to - in the same process - initiate client sessions with other SSL servers. I intend to create two separate SSL_CTX handles using two SSL_CTX_new() function calls, one invoked with server methods and the other with client methods. Is such dual-use of OpenSSL within a single process supported? My hope is that OpenSSL uses the SSL_CTX handle - and does not rely on global

Use microphone in multiple app simultaneously in Android

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We have an Android device on which we would like to use the microphone in 2 app simultaneously. In fact, we have a vocal command service that is running in the background (we are using the CMU Sphinx library). The problem is when we start a video recorder (camera application), we can't start the recording as 2 applications can't access to the microphone at the same time. Error 08-20 12:20:14.601: I/MediaRecorderJNI(7261): prepare: surface=0x59590668 08-20 12:20:15.916: E/MediaRecorder(7261): start failed: -38 08-20 12:20:15.916: E/com.example.CamcorderView(7261): Failed to start recorder. 08

which(vector1 < vector2)

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Let's make a small example first, that computes in R: x<- c(1,3,1,4,2) max(which(x<2)) [1] 3 Now, I would like to do this not just for one value 2, but for many values simultaneously. It should give me something like that: max(which(x<c(1,2,3,4,5,6))) [1] NA 3 5 5 5 5 Of course I could run a for loop, but that is very slow: for(i in c(1,2,3,4,5,6)){ test[i]<-max(which(x<i)) } Is there a fast way to do this? Find the max index of each value seen in x : xvals <- unique(x) xmaxindx <- length(x) - match(xvals,rev(x)) + 1L Rearrange xvals <- xvals[order(xmaxindx,decreasing=TRUE)] xmaxindx <-

How does a wiki handle multiple simultaneous edits?

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问题 This has always lingered in the back of my mind, so I figure I might as well go ahead and ask. How does a wiki handle multiple edits on the same content? Here's a simplistic example of what I'm asking. Let's say that a page has the following content: I'm a page! And now let's say that two go to edit that page. Each person adds a sentence: Person one: I'm a page! I'm a second sentence in the same page! Person two: I'm a page! I'm a second sentence! Imagine each person's second sentence being

How does a wiki handle multiple simultaneous edits?

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This has always lingered in the back of my mind, so I figure I might as well go ahead and ask. How does a wiki handle multiple edits on the same content? Here's a simplistic example of what I'm asking. Let's say that a page has the following content: I'm a page! And now let's say that two go to edit that page. Each person adds a sentence: Person one: I'm a page! I'm a second sentence in the same page! Person two: I'm a page! I'm a second sentence! Imagine each person's second sentence being an equally relevant but different fact about the topic of the page that each person wanted to add in.