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NumberPicker 扩展：滑动选择数字，自定义样式 · App Inventor 2 中文网
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What are your favorite extension methods for C#? (codeplex.com/extensionoverflow)
Let's make a list of answers where you post your excellent and favorite extension methods .
150 Answers
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Get the current displaying UIViewController on the screen in AppDelegate.m
...ut a way to navigate through the controllers hierarchy.
If you give some more details about the way you defined your app, then I might give some more hint.
EDIT:
If you want the topmost view (not view controller), you could check
[[[[UIApplication sharedApplication] keyWindow] subviews] lastObje...
How do I empty an array in JavaScript?
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Ways to clear an existing array A:
Method 1
(this was my original answer to the question)
A = [];
This code will set the variable A to a new empty array. This is perfect if you don't have references to the original array A anywhere else because this actually creates a brand new ...
What is the difference between dict.items() and dict.iteritems() in Python2?
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It's part of an evolution.
Originally, Python items() built a real list of tuples and returned that. That could potentially take a lot of extra memory.
Then, generators were introduced to the language in general, and that method was reimplemented as ...
Subdomain on different host [closed]
I'm trying to host a subdomain for my site with a different hosting company and I'm running into issues on how to set it up.
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Should I impose a maximum length on passwords?
I can understand that imposing a minimum length on passwords makes a lot of sense (to save users from themselves), but my bank has a requirement that passwords are between 6 and 8 characters long, and I started wondering...
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In PHP, what is a closure and why does it use the “use” identifier?
... and a reference to $total) outside of it scope and preserve their values (or in the case of $total the reference to $total itself) as state within the anonymous function itself.
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boundingRectWithSize for NSAttributedString returning wrong size
I am trying to get the rect for an attributed string, but the boundingRectWithSize call is not respecting the size I pass in and is returning a rect with a single line height as opposed to a large height (it is a long string). I have experimented by passing in a very large value for the height and a...
Javascript event handler with parameters
...ng upon your exact coding situation, you can pretty much always make some sort of closure preserve access to the variables for you.
From your comments, if what you're trying to accomplish is this:
element.addEventListener('click', func(event, this.elements[i]))
Then, you could do this with a sel...