logic

问题 I'm a newbie, so be kind :) What is the simplest solution for checking for, retrieving and using newly received data from a mysql database? The database is being updated from an external api. Ideally I would get it as it arrives but using intervals could work too. On the first iteration and then once every 5 minutes if there is no new data meanwhile - do an action with the next entry of the array which might cause data to be updated within the next 5 min. But I want to make sure to stop

问题 I need help writing these CTL. I don't reall understand how to write in NuSMV format yet, hopefully my code will make sense to you since it is incomplete atm. 2)If a process is waiting, it will eventually get to its critical section 3)The two processes must 'take turns' entering the critical section 4)It is possible for one process to get into the critical section twice in succession (before the other process does). 5)Successive entries into a critical section by process 1 will be separated

问题 I have developed a script whose sole purpose is to check if the website/service is up and running. The way it does that is ,it connects to the page using its url and logs in to the site using the user credentials. If the login is successful then the service is running fine. This script has been written in Java and uses HTMLUnit. Here lies my problem. How do i ensure the HTML page returned after logging in(clicking the login/sign in button after filling out the form) is the post-login "Account

问题 This question already has answers here : “C - C++” joke about postfix/prefix operation ordering (7 answers) Closed 5 years ago . Please help me to understand what is the difference between two "TRUE" and "FALSE" outputs. and also guide me how to get this logic and operator related topics in Oracle Docs. int i = 1; int j = 2; System.out.println(i==j--);// FALSE j = 2; System.out.println(i==j-1);//TRUE j = 2; System.out.println(i==--j);//TRUE 回答1: i == j-- means i == j; j = j - 1; i == j-1

问题 Hi sorry for asking this if this is a stupid question. I would like to ask how to securely divide a number in Javascript that it will always output the result in a way that it will output pure whole numbers. example: 10 / 2 ---> 5, 5 ( it would be 2 fives so it is whole number ) BUT 10 / 3 ---> 3, 3, 4 ( it would have two 3 and one 4 so that it would still result to 10 ) 回答1: 10/3 will give you 3.333333..., never four... if you want to check is a number will give you "whole numbers" as you

问题 When i put this below code i came with on visualization playground i get the Goal/Target line, but i want it to be dashed/dotted which requires certainty role as specified in the docs. Can anyone enlighten me how to do it with a array input to Google Datatable, or Datatable json string format Code function drawVisualization() { // Create and populate the data table. var data = google.visualization.arrayToDataTable([ ['Year', 'Red', 'Yellow', 'Green','Target'], ['2003', 20, 0, 0,80], ['2004',

问题 This might be a naive question, but i am really interested to know why logic was developed to be used in AI. In particular, what was the need to develop first order logic and PDDL in AI, if we could do the programming using simple atomic representation of states? Again, I realize this is a really basic question!! 回答1: So your question is about: why do we program/model on a first-order level instead of a propositional level? Simply because it is more concise. You can make propositions like

问题 Recently I had an exam where we were tested on logic circuits. I encountered something on that exam that I had never encountered before. Forgive me for I do not remember the exact problem given and we have not received our grade for it; however I will describe the problem. The problem had a 3 or 4 inputs. We were told to simplify then draw a logic circuit design for that simplification. However, when I simplified, I ended up eliminating the other inputs and ended up literally with just A I

问题 I have a json file that has a structure like this: [{"text_content":"aaaaa","text_duration":15,"start_time":"2015-10-07 23:25:29"}, {"text_content":"aawwaaaaa","text_duration":15,"start_time":"2015-10-07 23:25:44"}, {"text_content":"bbaawwaaaaa","text_duration":15,"start_time":"2015-10-07 23:25:59"}, etc. I have a div on my webpage user-text and I want to fill it with strings taken from this json. But there's a condition - I want to display the first text at the time assigned to it and for

问题 How to prove the following in Coq? (p->q)->(~q->~p) Here is what I started with: Lemma work : (forall p q : Prop, (p->q)->(~q->~p)). Proof. intros p q. intros p_implies_q not_q. intros p_true. 来源： https://stackoverflow.com/questions/54849221/how-to-prove-the-following-in-coq