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Set focus on textbox in WPF
...nt is readonly right How can you set in xaml? I used this and it did not work <Style.Triggers> <Trigger Property="Validation.HasError" Value="True"> <Setter Property="FocusManager.FocusedElement" Value="{Bind...
How do I copy folder with files to another folder in Unix/Linux? [closed]
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The option you're looking for is -R.
cp -R path_to_source path_to_destination/
If destination doesn't exist, it will be created.
-R means copy directories recursively. You can also use -r since it's case-insensitive.
Note the nuances with adding th...
How to Add a Dotted Underline Beneath HTML Text
...mpossible without CSS. In fact, the <u> tag is simply adding text-decoration:underline to the text with the browser's built-in CSS.
Here's what you can do:
<html>
<head>
<!-- Other head stuff here, like title or meta -->
<style type="text/css">
u {
border-bot...
AttributeError: 'module' object has no attribute 'tests'
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I finally figured it out working on another problem. The problem was that my test couldn't find an import.
It looks like you get the above error if your test fails to import. This makes sense because the test suite can't import a broken test. At lea...
Is it expensive to use try-catch blocks even if an exception is never thrown?
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try has almost no expense at all. Instead of doing the work of setting up the try at runtime, the code's metadata is structured at compile time such that when an exception is thrown, it now does a relatively expensive operation of walking up the stack and seeing if any try blocks ...
How to suppress scientific notation when printing float values?
....g.,
'%f' % (1/10**8)
will display zeros only.
details are in the docs
Or for Python 3 the equivalent old formatting or the newer style formatting
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How do I create a new class in IntelliJ without using the mouse?
... View can be activated via Alt+1.
To create a new class in the same directory as the current one use Ctrl+Alt+Insert (New...).
You can also do it from the Navigation Bar, press Alt+Home, then choose package with arrow keys, then press Alt+Insert.
Another useful shortcut is View | Select In (Alt+F...
WPF: How to programmatically remove focus from a TextBox
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in .NET Framework 4 just Keyboard.ClearFocus();
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How does a Java HashMap handle different objects with the same hash code?
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A hashmap works like this (this is a little bit simplified, but it illustrates the basic mechanism):
It has a number of "buckets" which it uses to store key-value pairs in. Each bucket has a unique number - that's what identifies the b...
Print an integer in binary format in Java
...r and I want to print it in binary. I don't want to do it by writing an algorithm, Is there any built-in function for that in Java?
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