"unary operator expected" error in Bash if condition
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
What's the significant use of unary plus and minus operators?
Mar 27, 2011 · The Unary + operator converts its operand to Number type. The Unary - operator converts its operand to Number type, and then negates it. (per the ECMAScript spec) In …
What is the purpose of the unary plus (+) operator in C?
Jul 10, 2011 · 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. …
A positive lambda: '+[]{}' - What sorcery is this? - Stack Overflow
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 …
c# - What does the unary plus operator do? - Stack Overflow
What does the unary plus operator do? There are several definitions that I have found (here and here) but I still have no idea what it would be used for. It seems like it doesn't do anything but th...
error: invalid type argument of ‘unary *’ (have ‘int’)
Mar 28, 2011 · Barebones C program to produce the above error: #include <iostream> using namespace std; int main(){ char *p; *p = 'c'; cout << *p[0]; //error: invalid type argument of …
What is an equivalent replacement for std::unary_function in C++17?
Aug 25, 2020 · IIRC, unary_function wasn't strictly needed by the standard library before C++17 either. You could have just defined by hand the two aliases it gives you inside your functor. …
What is a Unary association in UML - Stack Overflow
Feb 17, 2022 · 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 …
python - Make a union of polygons in GeoPandas, or Shapely (into …
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 …
unary operator expected in shell script when comparing null value …
unary operator expected in shell script when comparing null value with string Asked 12 years, 6 months ago Modified 8 years, 2 months ago Viewed 154k times