I had to solve this unary operator expected issue in remove_old_pkgs() of the helper script abk for Arch Sign Modules. See also 6.4 Bash Conditional Expressions
Actually, unary plus does do something - even in C. It performs the usual arithmetic conversions on the operand and returns a new value, which can be an integer of greater width. If the original value was an unsigned integer of lesser width than int, it will be changed to a signed value as well. Usually this isn't that important, but it can have an effect, so it's not a good idea to use unary ...
The result of the unary + operator is the value of its (promoted) operand. The integer promotions are performed on the operand, and the result has the promoted type. Worth pointing out that Annotated C++ Reference Manual (ARM) provides the following commentary on unary plus: Unary plus is a historical accident and generally useless.
This is important as the unary operator + has a set of built-in overloads, specifically this one: 13.6 Built-in operators [over.built] 8 For every type T there exist candidate operator functions of the form T* operator+(T*);
If unary +/- operators are used to perform conversions as the Number() casting function, then why do we need unary operators? What's the special need of these unary operators?
The term Unary however is not used in UML and might be confusing. UML uses the term binary to indicate that an association has two ends, and ternary or n-ary to indicate an association has multiple ends. The Unary association you are talking about is actually a binary association to itself, also known as reflexive association.
The unary + acts more like parseFloat since it also accepts decimals. parseInt on the other hand stops parsing when it sees a non-numerical character, like the period that is intended to be a decimal point ..
6 __pos__() exists in Python to give programmers similar possibilities as in C++ language — to overload operators, in this case the unary operator +. (Overloading operators means give them a different meaning for different objects, e. g. binary + behaves differently for numbers and for strings — numbers are added while strings are ...
I am trying to find the union of two polygons in GeoPandas and output a single geometry that encompasses points from both polygons as its vertices. The geopandas.overlay function gives me polygons...
