"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?
Jan 26, 2016 · 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 …
bash - [: -gt: unary operator expected - Stack Overflow
Jul 25, 2014 · I don't write a lot of Bash, so I'm a bit stumped as to how to fix this. I need to check whether a value returned from a command is greater than x. When it runs though I get [: -gt: …
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 …
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 …
parseInt vs unary plus, when to use which? - Stack Overflow
Jun 14, 2013 · 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 …
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. …
bash - [: -eq: unary operator expected - Stack Overflow
Jan 31, 2015 · [: -eq: unary operator expected Asked 10 years, 4 months ago Modified 8 years, 4 months ago Viewed 17k times
c# - What does the unary plus operator do? - Stack Overflow
Apr 7, 2009 · 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 …
What is unary + used for in Javascript? - Stack Overflow
Mar 29, 2012 · The unary + operator, when used on types other than string, will internally attempt to call valueOf () or toString () (in that order) and then attempt to convert the result to a …