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Good examples of Not a Functor/Functor/Applicative/Monad?
...tor:
newtype T a = T (a -> Int)
You can make a contravariant functor out of it, but not a (covariant) functor. Try writing fmap and you'll fail. Note that the contravariant functor version is reversed:
fmap :: Functor f => (a -> b) -> f a -> f b
contramap :: Contravar...
Load and execution sequence of a web page?
I have done some web based projects, but I don't think too much about the load and execution sequence of an ordinary web page. But now I need to know detail. It's hard to find answers from Google or SO, so I created this question.
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C++ Object Instantiation
...declared on the stack, its destructor is automatically called when it goes out of scope, which is your main tool for tracking resource lifetime and avoiding leaks.
So in general, every time you need to allocate a resource, whether it's memory (by calling new), file handles, sockets or anything else...
What's a simple way to get a text input popup dialog box on an iPhone
...te UIAlertView but for this example this should be okay.
You should check out the UIAlertView API and you'll see there are some more styles defined.
Hope this helped!
-- EDIT --
I was playing around with the alertView a little and I suppose it needs no announcement that it's perfectly possible ...
Fatal Error: Allowed Memory Size of 134217728 Bytes Exhausted (CodeIgniter + XML-RPC)
...f up to have a script that consumes all memory. Especially if you do this routinely. Putting "dangerous" in quotes doesn't make it any less dangerous. You really could hose your host server. Maybe start destroying data. I don't know, maybe lose your job? Sounds pretty dangerous to me. :|
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Server.Transfer Vs. Response.Redirect
...nds a message (HTTP 302) down to the browser.
Server.Transfer happens without the browser knowing anything, the browser request a page, but the server returns the content of another.
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What's the best practice to round a float to 2 decimals? [duplicate]
...on this way:
float x = 2.3f;
BigDecimal result;
result=round(x,2);
System.out.println(result);
This will print:
2.30
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Copy a file in a sane, safe and efficient way
...t the sun is going to set. Unless you have bug and leak memory (it will go out of scope). But since there is no dynamic memory management here there can not be a leak and they will go out of scope (just like the sun will set).
– Martin York
Jun 13 '13 at 15:29
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Center content of UIScrollView when smaller
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This adjustment helped me out when the scrollview had insets: CGFloat offsetX = MAX((scrollView.bounds.size.width - scrollView.contentInset.left - scrollView.contentInset.right - scrollView.contentSize.width) * 0.5, 0.0); CGFloat offsetY = MAX((scro...
What's the difference between “version number” in iTunes Connect, “bundle version”, “bundle version
...n be something like 12345 or 1.2.3 (Build 12345AB). This is shown in the About window for Mac OS X apps for example and is often more a "Build Number" than a "Version Number".
Bundle Version String (CFBundleShortVersionString)
This value is used as the "real" version number. This must be the same st...