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Iterating over Java collections in Scala
...= it.hasNext
override def next() = it.next()
}
val jIterator: Iterator[String] = ... // iterating over a large dataset
scalaIterator(jIterator).take(2).map(_.length).foreach(println) // only first 2 elements are loaded to memory
It has similar concept but less verbose IMO :)
...
Java regex email
...\.[A-Z]{2,6}$", Pattern.CASE_INSENSITIVE);
public static boolean validate(String emailStr) {
Matcher matcher = VALID_EMAIL_ADDRESS_REGEX.matcher(emailStr);
return matcher.find();
}
Works fairly reliably.
s...
How do I get the number of elements in a list?
...e number of items) of an object. The argument may be a sequence (such as a string, bytes, tuple, list, or range) or
a collection (such as a dictionary, set, or frozen set).
len is implemented with __len__, from the data model docs:
object.__len__(self)
Called to implement the built-in funct...
Will the Garbage Collector call IDisposable.Dispose for me?
... away and tested, just to make sure:
class Program
{
static void Main(string[] args)
{
Fred f = new Fred();
f = null;
GC.Collect();
GC.WaitForPendingFinalizers();
Console.WriteLine("Fred's gone, and he's not coming back...");
Console.ReadLine(...
When should I use RequestFactory vs GWT-RPC?
...ying, but if you have to create proxies anyway, then you'd rather have the extra help that RF gives you for managing those proxies. Not everybody wants to send the entire pojo to the client - for example, consider a poker game - your Player object might have information that everybody should see (n...
How to write a test which expects an Error to be thrown in Jasmine?
...ah).toThrow(). No arguments means check to see that it throws at all. No string matching required. See also: stackoverflow.com/a/9525172/1804678
– Jess
Nov 27 '13 at 14:32
1
...
How to implement an ordered, default dict? [duplicate]
...', None)])
And if your keys are single characters, you can just pass one string:
OrderedDict.fromkeys('abc')
This has the same output as the two examples above.
You can also pass a default value as the second arg to OrderedDict.fromkeys(...).
...
How to unit test a Node.js module that requires other modules and how to mock the global require fun
...ibly causes side effects (like the popular colors module which messes with String.prototype)
– ThomasR
Jan 3 '19 at 14:22
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When should we implement Serializable interface?
...g JSON you don't have to implement this interface and can simply send that string.. so Im still not sure why to use this interface when you can use JSON.
– Yonatan Nir
Aug 29 '16 at 7:21
...
What is a JavaBean exactly?
... @worldsayshi - No, it's not required. For example a bean can contain a String; and String is not a bean. (String is immutable, so you cannot create it by calling an empty constructor and a setter.) It seems reasonable that a Serializable object should have Serializable members, unless it somehow...