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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
... version numbers are provided. Use this event to modify the database as required by the version change.
DatabaseOpened()
当数据库打开时，会触发此事件。
DatabaseUpgrade(oldVersion,newVersion)
This event fires when the database is upgraded. The previous and new version numbers a...
What is Common Gateway Interface (CGI)?
...en performance is not paramount and a simple means of executing code is required. It is inefficient for the previously stated reasons and there are more modern means of executing any program in a web enviroment. Currently the most famous is FastCGI.
...
What is the purpose of backbone.js?
...
If you're going to build complex user interfaces in the browser then you will probably find yourself eventually inventing most of the pieces that make up frameworks like Backbone.js and Sammy.js. So the question is, are you building something co...
Checking if an Android application is running in the background
...if you call ActivityManager.getRunningAppProcesses() from your application UI thread it will return importance IMPORTANCE_FOREGROUND for your task no matter whether it is actually in the foreground or not. Call it in the background thread (for example via AsyncTask) and it will return correct result...
Can Protractor and Karma be used together?
...ts, while Protractor should be used for end to end testing.
Protractor is built on top of WebDriverJS, which uses a Selenium/WebDriver server to provision browsers and drive test execution. Examples of pure WebDriverJS can be found here: http://code.google.com/p/selenium/wiki/WebDriverJs
And
https...
Using async/await for multiple tasks
... have to wait asynchronously on Task.WhenAll so that you'll not block your UI thread:
public async Task DoSomeThing() {
var Task[] tasks = new Task[numTasks];
for(int i = 0; i < numTask; i++)
{
tasks[i] = CallSomeAsync();
}
await Task.WhenAll(task...
Most useful NLog configurations [closed]
...ple, you might have a "database" functional area, an "analysis" FA, and a "ui" FA. Each of these might have sub-areas. So, you might request loggers like this:
Logger logger = LogManager.GetLogger("Database.Connect");
Logger logger = LogManager.GetLogger("Database.Query");
Logger logger = LogMana...
Framework vs. Toolkit vs. Library [duplicate]
...ent.
A framework embodies some abstract
design, with more behavior built in.
In order to use it you need to insert
your behavior into various places in
the framework either by subclassing or
by plugging in your own classes. The
framework's code then calls your code
at these points...
What does an exclamation mark mean in the Swift language?
The Swift Programming Language guide has the following example:
22 Answers
22
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How to handle dependency injection in a WPF/MVVM application
I am starting a new desktop application and I want to build it using MVVM and WPF.
9 Answers
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