Top "Operators" questions

What does the .= operator mean in PHP?

I have a variable that is being defined as $var .= "value"; How does the use of the dot equal function?

php operators equals
Should I implement __ne__ as the negation of __eq__ in Python?

I have a class where I want to override the __eq__ method. It seems to make sense that I should …

python comparison operators python-datamodel
Default assignment operator= in c++ is a shallow copy?

Just a simple quick question which I couldn't find a solid answer to anywhere else. Is the default operator= just …

c++ operators shallow-copy
Android: How do I get GSM signal strength for all available network operators

I am working on a little app to check the signal strength of various network operators in my area. My …

android operators gsm signal-strength
Why doesn't Ruby support i++ or i--​ (increment/decrement operators)?

The pre/post increment/decrement operator (++ and --) are pretty standard programing language syntax (for procedural and object-oriented languages, at …

ruby operators language-design
What does operator ~= mean in Lua?

What does the ~= operator mean in Lua? For example, in the following code: if x ~= params then

lua operators
What is the <=> ("spaceship", three-way comparison) operator in C++?

While I was trying to learn about C++ operators, I stumbled upon a strange comparison operator on cppreference.com,* in …

c++ operators c++-faq c++20 spaceship-operator
What does &. (ampersand dot) mean in Ruby?

I came across this line of ruby code. What does &. mean in this? @object&.method

ruby syntax operators parameter-passing ruby-2.3
'At' symbol before variable name in PHP: @$_POST

I've seen function calls preceded with an at symbol to switch off warnings. Today I was skimming some code and …

php error-handling operators
JavaScript comparison operators: Identity vs. Equality

I've been trying to understand the difference between JavaScript's comparison operators: identity and equality. From what I've read, if you …

javascript operators comparison-operators equivalence