"unary operator expected" error in Bash if condition Asked 13 years, 1 month ago Modified 3 years, 6 months ago Viewed 661k times

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 …

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 …

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 …

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 …

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.

Mar 18, 2017 · 2 The unary operator & yields the address of its operand. The type is of T *, not T. Therefore you cannot assign a int * to an int without a cast. The expression

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 …

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 …

Jun 22, 2015 · The behavior of the unary minus operator on unsigned operands has nothing to do with whether a machine uses two's-complement arithmetic with signed numbers. Instead, …