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运行时会有runtime error，但是ai伴侣没有问题 - App Inventor 2 中文网 - ...
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JavaScript property access: dot notation vs. brackets?
...keywords (like new and class) in internet explorer 8.
I had this code:
//app.users is a hash
app.users.new = {
// some code
}
And this triggers the dreaded "expected indentifier" (at least on IE8 on windows xp, I havn't tried other environments). The simple fix for that is to switch to bracket...
Using Rails 3.1 assets pipeline to conditionally use certain css
I’m in the process of building my first solo Rails app using Rails 3.1.rc5. My problem is that I want to have my site render the various CSS files conditionally. I’m using Blueprint CSS and I’m trying to have sprockets/rails render screen.css most of the time, print.css only when printing,...
iOS 7 - Failing to instantiate default view controller
I am using Xcode 5 in a newly created app and when I just create it I go for the run button e click on it, then the project gets built but it does not show in the iOS Simulator and I get the following message:
...
EditText underline below text property
...:backgroundTint="" in your EditText xml layout.
For api<21 you can use AppCompatEditText from support library thenapp:backgroundTint=""
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Segue to another storyboard?
...e storyboard.
// Set this by selecting 'Is Initial View Controller' on the appropriate view controller in the storyboard.
UIViewController *theInitialViewController = [secondStoryBoard instantiateInitialViewController];
//
// **OR**
//
// Load the view controller with the identifier string myTabBa...
Difference between MVC 5 Project and Web Api Project
...er respects. The main difference between the project types is that the MVC Application project type adds web specific things like default CSS, JavaScript files and other resources needed for a web site, which are not needed for an API.
MVC is used for creating web sites. In this case Controllers u...
How to change current Theme at runtime in Android [duplicate]
... a PreferenceActivity that allows the user to choose the theme he wants to apply to the entire application.
13 Answers
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Random “Element is no longer attached to the DOM” StaleElementReferenceException
...e for WebDriver to make a good guess about all the cases where this might happen - so it throws up its hands and gives control to you, who as the test/app author should know exactly what may or may not happen. What you want to do is explicitly wait until the DOM is in a state where you know things w...
How do I provide JVM arguments to VisualVM?
I'm using VisualVM from JDK 1.6.0_26 to profile a Java webapp running under Tomcat, but VisualVM often tells me that it doesn't have enough memory to take a snapshot, and to use the -Xmx switch to provide more memory to Netbeans. The problem is, I'm running VisualVM outside of Netbeans, so how can I...