repeat

问题 I want for an event to fire every hour (at 5:00, 6:00, 7:00, etc...). I tried with a persistent background service with a thread but it wasn't the right solution because of: battery consumption service termination, due to android memory management So I'm trying with AlarmManager. It works if I set an alarm to fire in X seconds (using "set" method). But how can I repeat an event (using "setRepeating" method) at the top of every hour, until the alarm is canceled? Thanks! 回答1: When you set

问题 First of all, I could not even chose the method to use, i'm reading for hours now and someone says use 'Handlers', someone says use 'Timer'. Here's what I try to achieve: At preferences, theres a setting(checkbox) which to enable / disable the repeating job. As that checkbox is checked, the timer should start to work and the thread should be executed every x seconds. As checkbox is unchecked, timer should stop. Here's my code: Checking whether if checkbox is checked or not, if checked

问题 I have a Python list and I want to know what's the quickest way to count the number of occurrences of the item, '1' in this list. In my actual case, the item can occur tens of thousands of times which is why I want a fast way. ['1', '1', '1', '1', '1', '1', '2', '2', '2', '2', '7', '7', '7', '10', '10'] Which approach: .count or collections.Counter is likely more optimized? 回答1: a = ['1', '1', '1', '1', '1', '1', '2', '2', '2', '2', '7', '7', '7', '10', '10'] print a.count("1") It's probably

问题 This question already has answers here : Element-wise array replication in Matlab (7 answers) Closed 2 years ago . I'm pretty much beginner so it's probably possible to do what I want in a simple way. I have a matrix 121x62 but I need to expand it to 121x1488 so every column has to be repeated 24 times. For example, transform this: 2.2668 2.2667 2.2667 2.2666 2.2666 2.2666 2.2582 2.2582 2.2582 2.2582 2.2581 2.2581 2.283 2.283 2.283 2.2829 2.2829 2.2829 2.2881 2.2881 2.2881 2.2881 2.2881 2.288

问题 This question already has answers here : Repeat copies of array elements: Run-length decoding in MATLAB (5 answers) Closed 5 years ago . My question is similar to this one, but I would like to replicate each element according to a count specified in a second array of the same size. An example of this, say I had an array v = [3 1 9 4] , I want to use rep = [2 3 1 5] to replicate the first element 2 times, the second three times, and so on to get [3 3 1 1 1 9 4 4 4 4 4] . So far I'm using a

问题 This question already has answers here : Repeat copies of array elements: Run-length decoding in MATLAB (5 answers) Closed 5 years ago . My question is similar to this one, but I would like to replicate each element according to a count specified in a second array of the same size. An example of this, say I had an array v = [3 1 9 4] , I want to use rep = [2 3 1 5] to replicate the first element 2 times, the second three times, and so on to get [3 3 1 1 1 9 4 4 4 4 4] . So far I'm using a

问题 Can't seem to find an answer to this, say I have this: setInterval(function() { m = Math.floor(Math.random()*7); $('.foo:nth-of-type('+m+')').fadeIn(300); }, 300); How do I make it so that random number doesn't repeat itself. For example if the random number is 2, I don't want 2 to come out again. 回答1: There are a number of ways you could achieve this. Solution A: If the range of numbers isn't large (let's say less than 10), you could just keep track of the numbers you've already generated.

问题 I have an issue where there is no useful tags associated with some data, the data is included at the head of the document, but I can not get this to look how I want. I've had the Column1 text replacing the tags, but as they are all labelled , it doesn't help much. I'm slowly learning how XSLTs work, but this is beyond my knowledge. Any assistance would be appreciated. Input data <results> <header> <a>Column 1 Customer Name</a> <a>Column 2 Customer Add</a> <a>Column3</a> <a>Column4</a> <

问题 So I N - numbers I have to input, and I got M - numbers of places for those numbers and I need to find all combinations with repetition of given numbers. Here is example: Let's say that N is 3(I Have to input 3 numbers), and M is 4. For example let's input numbers: 6 11 and 533. This should be result 6,6,6,6 6,6,6,11 6,6,6,533 6,6,11,6 ... 533,533,533,533 I know how to do that manualy when I know how much is N and M: In example where N is 3 and M is 4: int main() { int N = 3; int M = 4; int

问题 I am quite new to Android, and I am really wondering about is how to loop or to repeat periodically a task. In my program, I have UpdateLoc() that sends my gps location to my databse, but I want it to update periodically (whether it be 3 min or 3 hours) without using too much battery and CPU. The problem is that I have no idea where to start... Is there a simple way to do this? 回答1: I believe you have two options in this case: Service - This will stay running in the background but use more