Top "Operators" questions

What does the (unary) * operator do in this Ruby code?

Given the Ruby code line = "first_name=mickey;last_name=mouse;country=usa" record = Hash[*line.split(/=|;/)] I understand everything …

ruby operators splat
When do we use the "||=" operator in Rails ? What is its significance?

Possible Duplicate: What does the operator ||= stands for in ruby? I am confused with the usage of ||= operator in Rails. …

ruby operators
VB to C# Functions

Which are the equivalent of the following operators from VB.Net to C#? UBound() LBound() IsNothing() Chr() Len() UCase() LCase() …

c# vb.net operators vb.net-to-c#
What does `<>` mean in Python?

I'm trying to use in Python 3.3 an old library (dating from 2003!). When I import it, Python throws me an error …

python syntax operators python-2.x
Static implicit operator

I recently found this code: public static implicit operator XElement(XmlBase xmlBase) { return xmlBase.Xml; } What does static implicit operator …

c# operators implicit-conversion
What's this =! operator?

I was surprised by this code: if (a =! b) { // let it be on false ... } But a is never assigned by …

c++ c operators
The 3 different equals

What is the difference between =, ==, and ===? I think using one equal sign is to declare a variable while two equal …

php comparison operators
What do the %op% operators in mean? For example "%in%"?

I tried to do this simple search but couldn't find anything on the percent (%) symbol in R. What does %in% …

r syntax operators r-faq
Asterisk in function call

I'm using itertools.chain to "flatten" a list of lists in this fashion: uniqueCrossTabs = list(itertools.chain(*uniqueCrossTabs)) how is …

python operators