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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): 问题: I am building a tool using C#. It's a Windows application. I have one text box on a form, and I want to assign focus to that text box when the user presses Ctrl + F or Ctrl + S . How do I do this? 回答1: Capture the KeyDown event and place an if statement in it to check what keys were pressed. private void form_KeyDown(object sender, KeyEventArgs e) { if ((e.Control && e.KeyCode == Keys.F) || (e.Control && e.KeyCode == Keys.S)) { txtSearch.Focus(); } } 回答2: One way is to override the ProcessCMDKey event. protected override bool ProcessCmdKey

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've created an expo app with exp init MyApp command and started it by running exp start in MyApp directory. Then I'm scanning barcode which was printed in console with expo mobile app on android device. Then "Something went wrong" screen is rendered instead of the app. View log shows "Uncaught Error: Couldn't load exp://.....". No errors in expo packager console output. It used to work sometimes ago. 回答1: For me the problem was happening when running over WiFi, as the tools always use the your first connection (you can check it by running

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 do something every time a page loads. It's something that fixes the way the mobile site looks on different devices so it needs to happen on AJAX loads too. At the moment, I've tried the traditional $(function(){ /*...*/ }); approach but that only works on the first load, and not subsequent AJAX loads. I've been looking for the right event to bind to but I'm failing pretty hard. 回答1: You can use JQuery to bind to each "page" (div's set with the data-role=page attribute) and use the pageshow event (there are some others as well:

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: The log levels WARN, ERROR and FATAL are pretty clear. But when is something DEBUG, and when INFO? I've seen some projects that are annoyingly verbose on the INFO level, but I've also seen code that favors the DEBUG level too much. In both cases, useful information is hidden in the noise. What are the criteria for determining log levels? 回答1: I don't think there are any hard-and-fast rules; using the log4j-type levels, my 'rules of thumb' are something like: FATAL : the app (or at the very least a thread) is about to die horribly. This is

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've got a in if-elif-elif-else statement in which 99% of the time, the else statement is executed: if something == 'this': doThis() elif something == 'that': doThat() elif something == 'there': doThere() else: doThisMostOfTheTime() This construct is done a lot , but since it goes over every condition before it hits the else I have the feeling this is not very efficient, let alone Pythonic. On the other hand, it does need to know if any of those conditions are met, so it should test it anyway. Does anybody know if and how this could be done

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: Is it possible to do following without the i ? for i in range(some_number): # do something If you just want to do something N amount of times and don't need the iterator. 回答1: Off the top of my head, no. I think the best you could do is something like this: def loop(f,n): for i in xrange(n): f() loop(lambda: , 5) But I think you can just live with the extra i variable. Here is the option to use the _ variable, which in reality, is just another variable. for _ in range(n): do_something() Note that _ is assigned the last result that returned

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 write 4 columns in a row like this Something Something Something Something Something Something Something Something data sizes are dynamic, so it can be 4, 8 or more. this is archived in other template engine {{#each list}} {{#if @index % 4 == 0}} {{/if}} {{this.name}} {{#if @index % 4 == 0}} {{/if}} {{/each}} but how can I archive this in thymeleaf? I can't find the way because th:each is in tag( or ) as attribute. 回答1: MODEL CODE List data = new ArrayList (); data.add("1"); data.add("2"); data.add("3"); data.add("4"); data.add("5"

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 need a command line utility to behave different if some string is piped into its STDIN. Here's some minimal example: package main // file test.go import ( "fmt" "io/ioutil" "os" ) func main() { bytes, _ := ioutil.ReadAll(os.Stdin) if len(bytes) > 0 { fmt.Println("Something on STDIN: " + string(bytes)) } else { fmt.Println("Nothing on STDIN") } } This works fine if you call it like that: echo foo | go run test.go If test.go is called without anything on STDIN, the thing stucks at... bytes, _ := ioutil.ReadAll(os.Stdin) ... waiting for EOF .

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'm attempting to write an ActiveRecord-esque bit of code in Obj-C, and encountered the following situation: I'm trying to create a static class variable in a base class that gets the inheriting class's name and converts into the table name with pluralization and some other formatting operations. I know that for an instance of a class that one can do something along the lines of the following: tableName = [[[self class] description] stringToTableName]; However, this requires one to use self . Is it possible to do something along following

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 implemented an activity logging mechanism based on Mongoid that saves events in MongoDB. The Mongoid model Activity has after_create events that perform different tasks depending on the type of activity logged: (Simplified example) class Activity include Mongoid::Document after_create do |activity| method_name = "after_#{activity.event_type}" send(method_name) if respond_to? method_name end def after_user_did_something MyItem.create!(:type => :user_did_something) end end The test looks like this: it 'should hide previous [objects] create a