intervals

问题 How can I run a function every minute? In JavaScript I can do something like setInterval , does something similar exist in Swift? Wanted output: Hello World once a minute... 回答1: var helloWorldTimer = NSTimer.scheduledTimerWithTimeInterval(60.0, target: self, selector: Selector("sayHello"), userInfo: nil, repeats: true) func sayHello() { NSLog("hello World") } Remember to import Foundation. Swift 4: var helloWorldTimer = Timer.scheduledTimer(timeInterval: 60.0, target: self, selector:

问题 How can I run a function every minute? In JavaScript I can do something like setInterval , does something similar exist in Swift? Wanted output: Hello World once a minute... 回答1: var helloWorldTimer = NSTimer.scheduledTimerWithTimeInterval(60.0, target: self, selector: Selector("sayHello"), userInfo: nil, repeats: true) func sayHello() { NSLog("hello World") } Remember to import Foundation. Swift 4: var helloWorldTimer = Timer.scheduledTimer(timeInterval: 60.0, target: self, selector:

问题 How can I run a function every minute? In JavaScript I can do something like setInterval , does something similar exist in Swift? Wanted output: Hello World once a minute... 回答1: var helloWorldTimer = NSTimer.scheduledTimerWithTimeInterval(60.0, target: self, selector: Selector("sayHello"), userInfo: nil, repeats: true) func sayHello() { NSLog("hello World") } Remember to import Foundation. Swift 4: var helloWorldTimer = Timer.scheduledTimer(timeInterval: 60.0, target: self, selector:

问题 I am building a game program with the following prompt: "Modify Challenge #3 so that every time a player clicks the heading, instead of stopping, the heading speeds up, making it harder and harder to click. Keep track of the number of times the heading has been clicked and update the heading text so it shows this number. When the player has reached 10 clicks, stop the animation and change the text of the heading to “You Win.” Hint: To speed up, you’ll have to cancel the current interval and

问题 4/1/2014 0:11 40.769 -73.9549 B02512| 4/1/2014 0:17 40.7267 -74.0345 B02512| 4/1/2014 0:21 40.7316 -73.9873 B02512| 4/1/2014 0:28 40.7588 -73.9776 B02512| 4/1/2014 0:33 40.7594 -73.9722 B02512| 4/1/2014 0:33 40.7383 -74.0403 B02512| and i created a time interval objet that lokks like this C--2014-04-11 00:15:00 UTC 2014-04-11 00:15:00 UTC (part of it ) what i want to do is to to add a column to the raw data, that indicates for each row, for which time interval (which is represented by a

问题 I have aset of ip ranges and i need to find if the ip given by the user exists between the given list of ip ranges . This is in continuation to this question How to check if a given ip falls between a given ip range using node js Jonas helped me get the ip exists or not. But i donot want to do a exhaustive iterative search , I want to go a fast performance intensive search as my list of ip ranges (or number ranges) will be huge. I looked into bloom filters as pointed by jonas but i am not

问题 I have aset of ip ranges and i need to find if the ip given by the user exists between the given list of ip ranges . This is in continuation to this question How to check if a given ip falls between a given ip range using node js Jonas helped me get the ip exists or not. But i donot want to do a exhaustive iterative search , I want to go a fast performance intensive search as my list of ip ranges (or number ranges) will be huge. I looked into bloom filters as pointed by jonas but i am not

问题 I have a history log and i want to summarize some entries. The interval should be 5 seconds For example: I have a list date_start | date_end | count | somestring 2015-09-15 12:04:09 | 2015-09-15 12:04:09| 1 | xyz 2015-09-15 12:05:09 | 2015-09-15 12:05:09| 1 | xyz 2015-09-15 12:05:10 | 2015-09-15 12:05:10| 1 | xyz 2015-09-15 12:05:11 | 2015-09-15 12:05:11| 1 | xyz 2015-09-15 12:06:09 | 2015-09-15 12:06:09| 1 | xyz I want now to have an output like date_start | date_end | count | somestring

问题 I need to use a INTERVAL EXPRESSION for a calculated field. like below: @Formula(" SYSDATE - INTERVAL '1' HOUR * SHOW_LIMIT_HOURS ") private Date showLimitDate; However, hibernate produces the following SQL fragment considering this expression like a column. and product0_.sold_at > ( SYSDATE - settings0_.INTERVAL '1' settings0_.HOUR * setting0_.SHOW_LIMIT_HOURS ) Anybody could help me ? 回答1: After 2 days suffering, analysing AST processing of hibernate source code i finally gave up !! =P ..

问题 Consider a question to find a minimum dominating set of an interval graph. In the context of interval scheduling, it is converted to the question below: There are multiple intervals which may or may overlap with each other. Find a minimum subset of the intervals, so that for every interval that is not included in the subset, it will find at least 1 interval in the subset that will overlap with it. There is an agreed greedy solution available from various sources on the Internet, such as one