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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: My question: Why is callNextMethod() not passing arguments as expected to the next method? Situation: Say I have two hierarchical classes foo and bar ( bar is subclass of foo ) for which I have a method foobar that can dispatch for both classes (i.e., has methods for both classes). Furthermore, the method for the (sub)class bar calls the method for foo after some calculations with callNextMethod() . Both methods have the same additional argument (with default) that should be passed to the method for foo , where only it is relevant.

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: What could this possibly mean in C++11? struct : bar {} foo {}; 回答1: First, we'll take a bog-standard abstract UDT (User-Defined Type): struct foo { virtual void f () = 0 ; }; // normal abstract type foo obj ; // error: cannot declare variable 'obj' to be of abstract type 'foo' Let's also recall that we can instantiate the UDT at the same time that we define it: struct foo { foo () { cout Let's combine the examples, and recall that we can define a UDT that has no name : struct { virtual void f () = 0 ; } instance ; // unnamed

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am using storyboards in my application, and if I set the title property of a ViewController class, that string will appear as the text of my back button when I push a SecondViewController, how can I change this?, I want to put a different title for the back button. I have used this but it doesn't work: UIBarButtonItem *btnBack = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStyleBordered target:self action:nil]; [self.navigationItem setBackBarButtonItem: btnBack]; please help me 回答1: Try this , Objective-C:

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I would like to have an percent circle indicator on my site: In this case it's showing 75%. How should this be done? I have the yellow circle in a image-file, but if it's easier to, some how, do it all using CSS, that's okay with me. 回答1: Considering the shape of the progress bar (rounded end/start) I would suggest using SVG. DEMO: Radial progress bar In the following example, the progress is animated with the stroke-dasarray attribute and the % numbers are incremented with jQuery: var count = $(('#count')); $({ Counter: 0 }).animate({

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Background: ruby thinks I'm referencing a top-level constant even when I specify the full namespace How do I refer to a submodule's "full path" in ruby? Here's the problem, distilled down to a minimal example: # bar.rb class Bar end # foo/bar.rb module Foo::Bar end # foo.rb class Foo include Foo::Bar end # runner.rb require 'bar' require 'foo' 回答1: Excellent; your code sample is very clarifying. What you have there is a garden-variety circular dependency, obscured by the peculiarities of Ruby's scope-resolution operator. When you run the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I want to generate Makefile with install target, making installation to /usr instead of default /usr/local. Assuming that build directory is done in the source subdirectory, I execute: cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr .. CMakeCache.txt contains: CMAKE_INSTALL_PREFIX:PATH=/usr (OK?) Now I execute: make make install All files are still installed to usr/local. What is wrong? Edit: There is no CMAKE_INSTALL_PREFIX in any of CMakeLists.txt project files. Before running cmake, I delete everything from the output directory. install directives

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a jqplot bar chart and I want the chart data to be changed when the user changes the value on a drop-down list. That works, but the problem is the bar chart redraws, one over another, each time the user changes the values. How can I update or reload the bars without drawing the whole thing again? Is there any property value to be set? Chart data changes according to an ajax call: $.ajax({ url: '/Home/ChartData', type: 'GET', data: { Id: Id }, dataType: 'json', success: function (data) { $.jqplot('chartDiv', [a, b],

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have troubles with a function in Kotlin that should return Unit, but due to a usage of another function returning a Boolean, there is a type mismatch. Here is a contrived example: fun printAndReturnTrue(bar: Int): Boolean { println(bar) return true } fun foo(bar: Int): Unit = when(bar) { 0 -> println("0") else -> printAndReturnTrue(bar) } Here, I actually do not care about the fact that printAndReturnTrue returns a boolean. I just want foo to perform side-effect operations. But the compiler warns about a type mismatch: my else should

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a modal view controller whose view comes from a XIB. I want it to have the same look and feel as the rest of my navigation based app, but it's not a view that's pushed to the navigation stack, it's presented modally. I dragged a UINavigationBar in and made it an outlet, but it doesn't have a title property to set. I have two fields that can bring up this modal view, and I want the title set differently depending on which one creates the modal view. 回答1: UINavigationBar 's manage a stack of UINavigationItem s much like a

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I want to place a search bar in the new navigation bar with the new iOS 11 large titles. However, the color of the search bar is automatically applied by iOS and I can't change it. if #available(iOS 11.0, *) { let sc = UISearchController(searchResultsController: nil) navigationItem.searchController = sc navigationItem.hidesSearchBarWhenScrolling = false } The search bar get's a deep blue background, but I just want to change it to white. Setting the background color results in this: navigationItem.searchController?.searchBar.backgroundColor