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Unexpected results when working with very big integers on interpreted languages
...0500000000
Python's int auto promotes to a Python long which supports arbitrary precision. It will produce the correct answer on 32 or 64 bit platforms.
This can be seen by raising 2 to a power far greater than the bit width of the platform:
>>> 2**99
633825300114114700748351602688L
...
Difference between object and class in Scala
...object O creates a singleton object O as instance of some anonymous class; it can be used to hold static members that are not associated with instances of some class.
object O extends T makes the object O an instance of trait T; you can then pass O anywhere, a T is expected.
if there is a class C, t...
A quick and easy way to join array elements with a separator (the opposite of split) in Java [duplic
...
Using Java 8 you can do this in a very clean way:
String.join(delimiter, elements);
This works in three ways:
1) directly specifying the elements
String joined1 = String.join(",", "a", "b", "c");
2) using arrays
String[] array = new String[] { "a", "b", "c" };
String joined2 = String....
Is it unnecessary to put super() in constructor?
Isn't this one automatically put by the compiler if I don't put it in a subclass's constructor?
6 Answers
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Looking to understand the iOS UIViewController lifecycle
...e appropriate times by iOS when you load/present/hide the view controller. It's important to note that these methods are attached to UIViewController and not to UIViews themselves. You won't get any of these features just using a UIView.
There's great documentation on Apple's site here. Putting in ...
When should we use mutex and when should we use semaphore
... from a global linked list, you do not want another thread to muck around with pointers while you are deleting the node. When you acquire a mutex and are busy deleting a node, if another thread tries to acquire the same mutex, it will be put to sleep till you release the mutex.
Spinlock:
Use a spin...
Haskell offline documentation?
What are the possibilities, if any, for getting offline docs for Haskell core libraries (and maybe more)?
9 Answers
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Libraries do not get added to APK anymore after upgrade to ADT 22
...cause they may not see this 'fix'
immediately.
Give this a shot and with luck it will solve your problem.
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How do I vertically center text with CSS? [duplicate]
...: 2px dashed #f69c55;
}
<div>
Hello World!
</div>
It only works for a single line of text though, because we set the line's height to the same height as the containing box element.
A more versatile approach
This is another way to align text vertically. This solution will...
ETag vs Header Expires
...r not to make a request for that file again in the future. If ETag is all it has, it will always have to make a request. However, when the server reads the ETag from the client request, the server can then determine whether to send the file (HTTP 200) or tell the client to just use their local cop...