"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
c# - What does the unary plus operator do? - Stack Overflow
Apr 7, 2009 · 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. …
What's the significant use of unary plus and minus operators?
Mar 27, 2011 · 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 …
What is the purpose of the unary plus (+) operator in C?
Jul 10, 2011 · The unary + operator does only one thing: . Since those would occur anyway if the operand were used in an expression, one imagines that unary + is in C simply for symmetry …
What's the purpose of the + (pos) unary operator in Python?
May 29, 2013 · 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 …
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 …
Optimization needed for unary_union function from shapely
Apr 16, 2024 · 1 I am curious to know if unary_union () from shapely can be optimized further in terms of speed. Is using cascaded_union from shapely a better solution or any alternate …
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, 9 months ago Modified 8 years, 4 months ago Viewed 154k times
Bash script error [: !=: unary operator expected - Stack Overflow
Pretty much covers all of your cases, and no empty string or unary concerns. In the case the first arg is '-v', then do your conditional ps -ef, else in all other cases throw the usage.
How do the C and C++ compilers distinguish unary operators?
Feb 11, 2025 · Deduction of whether it's a subtraction or a unary operator depends on the presence of a previous operand and is highly contextual. Can someone give a simple …