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`levels
...are good, but they are missing an important point. Let me try and describe it.
R is a functional language and does not like to mutate its objects. But it does allow assignment statements, using replacement functions:
levels(x) <- y
is equivalent to
x <- `levels<-`(x, y)
The trick is,...
How do I use a custom deleter with a std::unique_ptr member?
I have a class with a unique_ptr member.
6 Answers
6
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Reverse a string in Python
...gt;> 'hello world'[::-1]
'dlrow olleh'
This is extended slice syntax. It works by doing [begin:end:step] - by leaving begin and end off and specifying a step of -1, it reverses a string.
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Why does Java have transient fields?
...ike to a file) process.
From the Java Language Specification, Java SE 7 Edition, Section 8.3.1.3. transient Fields:
Variables may be marked transient to
indicate that they are not part of the
persistent state of an object.
For example, you may have fields that are derived from other field...
Most efficient method to groupby on an array of objects
...follow
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edited Mar 26 at 21:11
answered Jan 20 '16 at 2:02
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How to get ALL child controls of a Windows Forms form of a specific type (Button/Textbox)?
...
Here's another option for you. I tested it by creating a sample application, I then put a GroupBox and a GroupBox inside the initial GroupBox. Inside the nested GroupBox I put 3 TextBox controls and a button. This is the code I used (even includes the recursion you...
Eclipse says: “Workspace in use or cannot be created, chose a different one.” How do I unlock a work
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edited Apr 29 '16 at 8:56
J4cK
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What's the difference between Task.Start/Wait and Async/Await?
...sing something
You are.
what is the difference between doing Task.Wait and await task?
You order your lunch from the waiter at the restaurant. A moment after giving your order, a friend walks in and sits down next to you and starts a conversation. Now you have two choices. You can ignore yo...
What is the intended use-case for git stash?
...work on branch A and suddenly need to work on branch B before being ready with a commit on branch A, I stash my changes on A, checkout B, do my work there, then checkout A and apply the stash.
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How can I echo HTML in PHP?
I want to conditionally output HTML to generate a page, so what's the easiest way to echo multiline snippets of HTML in PHP 4+? Would I need to use a template framework like Smarty?
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