repeat

问题 How to match any character which repeats n times? Example: for input: abcdbcdcdd for n=1: .......... for n=2: ......... for n=3: .. ..... for n=4: . . .. for n=5: no matches After several hours my best is this expression (\w)(?=(?:.*\1){n-1,}) //where n is variable which uses lookahead. However the problem with this expression is this: for input: abcdbcdcdd for n=1 .......... for n=2 ... .. . for n=3 .. . for n=4 . for n=5 no matches As you can see, when lookahead matches for a character, let

问题 Say I have a number=20 and a $value=7 . If I want to make a string of 20 7's using PHP. what's the quickest way to make this? So output like: $a='77777777777777777777'; Any functions to make this easier? 回答1: $a=str_repeat($value,$number); 回答2: You can use str_repeat(), e.g. $a=str_repeat('7', 20); 回答3: Use str_repeat(): $a = str_repeat('7', 20); 回答4: str_repeat is pretty easy $a = str_repeat('7', 20); 回答5: $a = str_repeat('7', 20); str_repeat() ...or maybe: $a = str_pad('', 20, '7'); str_pad

问题 In JavaScript, how can I repeat an array which contains multiple elements, in a concise manner? In Ruby, you could do irb(main):001:0> ["a", "b", "c"] * 3 => ["a", "b", "c", "a", "b", "c", "a", "b", "c"] I looked up the lodash library, and didn't find anything that was directly applicable. Feature request: repeat arrays. is a feature request for adding it to lodash, and the best workaround given there is const arrayToRepeat = [1, 2, 3]; const numberOfRepeats = 3; const repeatedArray = _

问题 I'm trying to implement a logic for my .NET MVC application where I would trigger scheduled tasks in my application on a following basis: First scheduled task to run from 00 am to 1 am in the morning Second scheduled task to run from 1:10 am to 08:00 am in the morning Third scheduled task to run from 8:15 am to 11:15 pm every 1 hour This would repeat every day 365 days a year... Which mechanism in .NET or external library could I use to implement this the easiest way with little code? I was

问题 I want to test add local notification. I want it repeat daily/hourly. How can I do that? NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar]; // Get the current date NSDate *now = [NSDate date]; // Break the date up into components NSDateComponents *dateComponents = [calendar components:( NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit ) fromDate:now]; NSDateComponents *timeComponents = [calendar components:( NSHourCalendarUnit | NSMinuteCalendarUnit |

问题 I am now currently coding a plugin for the WordPress admin. It's about custom meta boxes. I would like to create a slideshow plugin, just for learning a lot of coding. I have created one metabox, that contains an image upload and a text input field. (see picture bellow) So on, I can save the fields, so I can upload an image and set an capton to it inside the text field. When I save the post/page inside WordPress it will save the values for me in my database. That's fine! Now I would like to

问题 I'm using AlarmManager to set up repeating intents but it has caused some little troubles so hope anyone could help. Summary There are 2 pending intents. One runs at 1000 and another runs at 2000 every day. Each contains a row id from the database for identification purpose. The code looks something like this: Intent i = new Intent(mContext, ScheduleReceiver.class); i.putExtra(RuleDBAdapter.KEY_ROWID, (int)taskId); PendingIntent pi =PendingIntent.getBroadcast(...); mAlarmManager.set

问题 I have figured out how to make a table in R with 4 variables, which I am using for multiple linear regressions. The dependent variable (Lung) for each regression is taken from one column of a csv table of 22,000 columns. One of the independent variables (Blood) is taken from a corresponding column of a similar table. Each column represents the levels of a particular gene, which is why there are so many of them. There are also two additional variables (Age and Gender of each patient). When I

问题 UILocalNotification has been depreciated so I would like to update my code to the UserNotification framework: let alertDays = 3.0 let alertSeconds = alertDays * 24.0 * 60.0 * 60.0 let localNotification:UILocalNotification = UILocalNotification() localNotification.alertAction = "Reminder" localNotification.alertTitle = "Reminder Title" localNotification.alertBody = "Reminder Message" localNotification.fireDate = Foundation.Date(timeIntervalSinceNow: alertSeconds) localNotification

问题 In my iOS game, I hope the hero keep running until screen is touched and the hero should jump. So I write: In .h file: @interface Hero : CCSprite { CCSprite *_hero; id _keepRunning; } @property(nonatomic,retain) id keepRunning; In .m file: @synthesize keepRunning = _keepRunning; -(id) init { _keepRunning = [CCRepeatForever actionWithAction:[CCAnimate actionWithSpriteSequence:@"heroRun%04d.png" numFrames:30 delay:0.02f restoreOriginalFrame:NO]]; } Then when the game starts, I call run ()