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Popup弹出菜单扩展 · App Inventor 2 中文网
...单选择
when Popup1.MenuItemSelected ID Title Checked
do
if ID = 1 then
show notification "选择了: " & Title
else if ID = 2 then
show notification "选项2状态: " & Checked
else if ID = 3 then
show notification "选择了选项3"
动态菜单管...
When is it practical to use Depth-First Search (DFS) vs Breadth-First Search (BFS)? [closed]
... when you are deciding what move to make, you can mentally imagine a move, then your opponent’s possible responses, then your responses, and so on. You can decide what to do by seeing which move leads to the best outcome.
Only some paths in a game tree lead to your win. Some lead to a win by your...
Test whether a glob has any matches in bash
... Example usage requested.
if compgen -G "/tmp/someFiles*" > /dev/null; then
echo "Some files exist."
fi
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Bind TextBox on Enter-key press
...!= null)
{
binding.UpdateSource();
}
}
}
Then in your XAML you set the InputBindingsManager.UpdatePropertySourceWhenEnterPressedProperty property to the one you want updating when the Enter key is pressed. Like this
<TextBox Name="itemNameTextBox"
Text=...
Should unit tests be written for getter and setters?
...getters/setters to achieve their goal of testing the "real" functionality, then that's good enough.
If, on the other hand, your getters and setters do more than just get and set (i.e. they're properly complex methods), then yes, they should be tested. But don't write a unit test case just to test ...
What does java.lang.Thread.interrupt() do?
...Thread.interrupt() sets the interrupted status/flag of the target thread. Then code running in that target thread MAY poll the interrupted status and handle it appropriately. Some methods that block such as Object.wait() may consume the interrupted status immediately and throw an appropriate excep...
How does having a dynamic variable affect performance?
... M()
{
dynamic d1 = whatever;
dynamic d2 = d1.Foo();
then the compiler will generate code that is morally like this. (The actual code is quite a bit more complex; this is simplified for presentation purposes.)
class C
{
static DynamicCallSite FooCallSite;
void M()
...
Merging between forks in GitHub
I forked a GitHub repository. Then I pushed some changes to my fork. Then the original repository merged my changes and some others. Now, I want to merge those changes I'm missing. I tried a simple pull followed by push, but this yield my commits in duplicate. What's the best way to do it?
...
HTTP Error 403.14 - Forbidden - The Web server is configured to not list the contents of this direct
...
keep this into your web config file then rename the add value="yourwebformname.aspx"
<system.webServer>
<defaultDocument>
<files>
<add value="insertion.aspx" />
</files>
</defaultDocument>
...
How does a Breadth-First Search work when looking for Shortest Path?
...ssors are set to empty. In your example, you set A's distance to zero, and then proceed with the BFS. On each step you check if you can improve the distance of a descendant, i.e. the distance from the origin to the predecessor plus the length of the edge that you are exploring is less than the curre...