selector

问题 I have a table, and usually i use this selector to apply odd and even row: table.find('tbody tr:even').addClass('even'); table.find('tbody tr:odd').removeClass('even'); My Table has rows being inserted at various places, hence why i remove it from the odd rows. I now have certain rows hidden using jQueryTrObject.hide(); I want to apply the same styling as before, so that alternate rows, as far as the user is concerned are marked up odd and even, and i'd like it to take into account of hidden

问题 We all know that using asyncio substantially improves the performance of a socket server, and obviously things get even more awesome if we could take advantage of all cores in our cpu (maybe via multiprocessing module or os.fork() etc.) I'm now trying to build a multicore socket server demo, with a asynchronous socket server listening on each core and all binding to one port. Simply by creating a async server and then use os.fork() , let processes work competitively. However the single-core

问题 I am trying to overwrite an existing component in angular. My original component is: @Component({ selector: 'app-orginal', templateUrl: './orginal.component.html', styleUrls: ['./orginal.component.css'] }) export class OrginalComponent implements OnInit { } in the app.component.html I use the original component like that: <app-orginal></app-orginal> What you would like to do is overwrite the original component with the mock component. This is my mock component: @Component({ selector: 'app

问题 I'm using XPATH to select certain nodes from an XML document. The user is able to insert a value for the location. It's working fine, but it does not work if different cases are used. I've decided that changing both the XML values and the user's input to lower case before being compared is probably the best way to go about it. I've got this as my selector at the moment: NodeIter = nav.Select("/Houses/House/location[contains(../location, '" + location_input + "')]"); I've tried putting the

问题 This question already has answers here : What is the swift equivalent to _cmd? (2 answers) Is there a Swift alternative for NSLog(@“%s”, __PRETTY_FUNCTION__) (11 answers) Closed 5 years ago . My previous question was marked duplicate. I tried to edit my question, but I can't remove duplicate tag, so I have to create a new one What is the swift equivalent to _cmd? I want to get current method name to use in a format message similar to this one [NSExeception raise

问题 I need a timer so I used this code: timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(generalKnowledge.method), userInfo: nil, repeats: true) But I do not understand the #selector . I tried multiple times but it doesn't work. 回答1: selector() is where you'd add in the function that you want it to call every timeInterval you set. In your example it's every second. Do bare in mind that in Swift 4 and above, you need to add @objc before a function if you want to call

问题 I want to get the date from this div: <div class="pandatacontcol" style=" width:160px;"> <h6>Date Qualified</h6> <p id="QualDate34868684">2013-03-08 12:04:01</p> </div> so output would be: 2013-03-08 I tried to do like that: elements = doc.select("p[id^=\"QualDate\"]"); but it doesn't work. 回答1: Try without quote marks doc.select("p[id^=QualDate]"); Value of attribute is set inside quote marks <tag attribute="value"> , but those quote marks are not part of value. 来源： https://stackoverflow.com

问题 I have an app where the network activity is done in its separate thread (and the network thread continuously gets data from the server and updates the display - the display calls are made back on the main thread). When the user logs out, the main thread calls a disconnect method on the network thread as follows: [self performSelector:@selector(disconnectWithErrorOnNetworkThread:) onThread:nThread withObject:e waitUntilDone:YES]; This selector gets called most of the time and everything works

问题 A function circleOfButtons:buttonSize:radius: in SGView ( below ) is called from ParentView and I want ParentView to define the values inside SGView whenever ParentView sends a message to SGView . This is the implementation file. #import <UIKit/UIKit.h> #import “ParentView.h" #import "SGView.h" @implementation ParentView : UIView - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:[UIScreen mainScreen].bounds]; if (self) { self.backgroundColor = [UIColor lightGrayColor]; int count

问题 i got help (Select a Tag with a Selector from a Text Variable using jQuery) on looping the static var and replacing it value, but just one question is left from it, is how can i replace finded tags with newly changed tags in the text area Code: var length = 30; var end = '...'; var text = `some string here with <a href="#link">http:something.com</a> more string and more links also`; $('<div>' + text + '</div>').find('a').each(function() { var link_value = $(this).html(); $(this).html(link