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git: undo all working dir changes including new files
How to delete all changes from working directory including new untracked files. I know that git checkout -f does that, but it doesn't delete new untracked files created since last commit.
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How do you add an array to another array in Ruby and not end up with a multi-dimensional result?
...s, but you can concatenate:
a1.concat a2
a1 + a2 # creates a new array, as does a1 += a2
or prepend/append:
a1.push(*a2) # note the asterisk
a2.unshift(*a1) # note the asterisk, and that a2 is the receiver
or splice:
a1[a1.length, 0] = a2
a1[a1.length..0] = a2
a1.ins...
How to change color of Android ListView separator line?
...nt[] colors = {0, 0xFFFF0000, 0}; // red for the example
myList.setDivider(new GradientDrawable(Orientation.RIGHT_LEFT, colors));
myList.setDividerHeight(1);
Hope it helps
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Package Manager Console Enable-Migrations CommandNotFoundException only in a specific VS project
I tried to run the command 'Enable-Migrations' in a new project and I got the message:
26 Answers
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Java enum - why use toString instead of name
...re the enum constant, you should use name() as toString may have been overriden
If you want to print the enum constant in a user friendly way, you should use toString which may have been overriden (or not!).
When I feel that it might be confusing, I provide a more specific getXXX method, for examp...
How to perform runtime type checking in Dart?
.../optional-types/.
Here's an example:
class Foo { }
main() {
var foo = new Foo();
if (foo is Foo) {
print("it's a foo!");
}
}
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follo...
Adding elements to object
...f you're reusing the same element object and you repopulate it's keys with new values, then you would be modifying one and the same instance of element, pushing it again and again into an array. Just use a new element object for each element you're adding, which is what you've done in the scope of a...
Clear the entire history stack and start a new activity on Android
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In API level 11 a new Intent Flag was added just for this: Intent.FLAG_ACTIVITY_CLEAR_TASK
Just to clarify, use this:
Java
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
Kotlin
intent.flags = Intent.FLAG_AC...
How to render a PDF file in Android
...API Level 21 (Lollipop) Android provides a PdfRenderer class:
// create a new renderer
PdfRenderer renderer = new PdfRenderer(getSeekableFileDescriptor());
// let us just render all pages
final int pageCount = renderer.getPageCount();
for (int i = 0; i < pageCount; i++) {
Page page = r...
How to dynamically update a ListView on Android [closed]
... setContentView(R.layout.filterable_listview);
setListAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1,
getStringArrayList());
}
Running the app now should show your previous ListView, with a nice box a...