candidate

boyce codd and finding candidate keys

狂风中的少年 提交于 2019-12-24 14:06:59
问题 needing desperate help with understanding boyce codd and finding the candidate keys. i found a link here http://djitz.com/neu-mscs/how-to-find-candidate-keys/ which i have understood for most part but i get stuck e.g (A B C D E F) A B → C D E B C D → A B C E → A D B D → E right as far as i understand from the link i know you find the common sets from the left which is only B, and common sets from the right which are none now where do i go from here? i know all candidate sets will have B in

What are ICE Candidates and how do the peer connection choose between them?

南楼画角 提交于 2019-12-17 22:04:39
问题 I newly wrote a simple chat application, but I didn't really understand the background of ICE Candidates. When the peer create a connection they get ICE Candidates and they exchange them and set them finally to the peerconnection. So my question is, where do the ICE Candidates come from and how are they used and are they all really used ? I have noticed that my colleague got less candidates when he executes the application on his machine, what could be the reason for different amount of

Are IceCandidate and SDP static?

*爱你&永不变心* 提交于 2019-12-13 02:08:52
问题 Are IceCandidate and SDP fixed values? Is this a good idea to store them in a server database instead of retrieving on every connection? If updating these data is unavoidable, when should I do it? 回答1: No they are not fixed values. Ice candidates locate the user in the network topology they reside in at present , which unless you have a static IP (which almost nobody has) AND a wired internet connection AND a static LAN address, AND a desktop computer that connects solely through these means

Android: How to make button on candidate view in softkeyboard?

此生再无相见时 提交于 2019-12-05 01:16:03
问题 I want to make candidateView inside button but you see log cat: please share code My Code SoftKeyboard.java @Override public View onCreateCandidatesView() { LayoutInflater li = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); View wordBar = li.inflate(R.layout.wordbar, null); LinearLayout ll = (LinearLayout) wordBar.findViewById(R.id.words); Button btn = (Button) wordBar.findViewById(R.id.button1); btn.setOnClickListener(this); mCandidateView = new

What are ICE Candidates and how do the peer connection choose between them?

痞子三分冷 提交于 2019-11-28 15:47:19
I newly wrote a simple chat application, but I didn't really understand the background of ICE Candidates. When the peer create a connection they get ICE Candidates and they exchange them and set them finally to the peerconnection. So my question is, where do the ICE Candidates come from and how are they used and are they all really used ? I have noticed that my colleague got less candidates when he executes the application on his machine, what could be the reason for different amount of Candidates ? the answer from @Ichigo is correct, but it is a litte bit bigger. Every ICE contains 'a node'

There are no primary or candidate keys in the referenced table that match the referencing column list in the foreign key

吃可爱长大的小学妹 提交于 2019-11-26 22:38:07
In SQL Server , I got this error -> "There are no primary or candidate keys in the referenced table 'BookTitle' that match the referencing column list in the foreign key 'FK_ BookCopy _Title__2F10007B'." I first created a relation called the BookTitle relation. CREATE TABLE BookTitle ( ISBN CHAR(17) NOT NULL, Title VARCHAR(100) NOT NULL, Author_Name VARCHAR(30) NOT NULL, Publisher VARCHAR(30) NOT NULL, Genre VARCHAR(20) NOT NULL, Language CHAR(3) NOT NULL, PRIMARY KEY (ISBN, Title)) Then I created a relation called the BookCopy relation. This relation needs to reference to the BookTitle

There are no primary or candidate keys in the referenced table that match the referencing column list in the foreign key

女生的网名这么多〃 提交于 2019-11-26 11:11:17
问题 In SQL Server , I got this error -> \"There are no primary or candidate keys in the referenced table \'BookTitle\' that match the referencing column list in the foreign key \'FK_ BookCopy _Title__2F10007B\'.\" I first created a relation called the BookTitle relation. CREATE TABLE BookTitle ( ISBN CHAR(17) NOT NULL, Title VARCHAR(100) NOT NULL, Author_Name VARCHAR(30) NOT NULL, Publisher VARCHAR(30) NOT NULL, Genre VARCHAR(20) NOT NULL, Language CHAR(3) NOT NULL, PRIMARY KEY (ISBN, Title))