"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. If the …
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 operators?
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 with …
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 means …
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 form T* …
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 solution is available? …
unary operator expected in shell script when comparing null value with ...
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 summary of the rules of how …