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Where does Scala look for implicits?
...ever seems to get fully formed, as if there weren't words for it. :-) For example, where do the values for integral below come from?
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Test if lists share any items in python
... Python, searching them is O(1) (see here for more information about complexity of operators in Python). Theoretically, this is O(n+m) on average for n and m objects in lists a and b. But 1) it must first create sets out of the lists, which can take a non-negligible amount of time, and 2) it suppose...
Match multiple cases classes in scala
...C(_) => "B"
case _ => "default"
}
}
If you must, must, must extract the parameter and treat them in the same code block, you could:
def matcher(l: Foo): String = {
l match {
case A() => "A"
case bOrC @ (B(_) | C(_)) => {
val s = bOrC.asInstanceOf[{def s: String}]...
Does Python support short-circuiting?
Does Python support short-circuiting in boolean expressions?
3 Answers
3
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Creating my own Iterators
...ber of templates and concepts to implement new iterators and adapters for existing iterators. I have written an article about this very topic; it's in the December 2008 ACCU magazine. It discusses an (IMO) elegant solution for exactly your problem: exposing member collections from an object, using B...
String, StringBuffer, and StringBuilder
...ng class because a String object is immutable.
If your string can change (example: lots of logic and operations in the construction of the string) and will only be accessed from a single thread, using a StringBuilder is good enough.
If your string can change, and will be accessed from multiple threa...
Aggregate / summarize multiple variables per group (e.g. sum, mean)
From a data frame, is there a easy way to aggregate ( sum , mean , max et c) multiple variables simultaneously?
8 Answer...
What tools are there for functional programming in C?
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You can use GCC's nested functions to simulate lambda expressions, in fact, I have a macro to do it for me:
#define lambda(return_type, function_body) \
({ \
return_type anon_func_name_ function_body \
anon_func_name_; \
})
Use like this:
int (*max)(int, int) = la...
How do I POST JSON data with cURL?
...e. However, I want to test it with cURL. I am trying to post a JSON data. Example data is like this:
24 Answers
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How do I loop through a date range?
... you could hit every other day, every third day, only weekdays, etc. For example, to return every third day starting with the "start" date, you could just call AddDays(3) in the loop instead of AddDays(1).
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