"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: …
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...
Behaviour of increment and decrement operators in Python
Sep 28, 2009 · The + operator is the identity operator, which does nothing. (Clarification: the + and - unary operators only work on numbers, but I presume that you wouldn't expect a …
python - bit-wise operation unary ~ (invert) - Stack Overflow
Here is an implementation for anyone wanting a literal inversion of bit digits in an integer's semantic binary representation. e.g., 0b110010 -> 0b1101 and not 0b110010 -> -0b110011 as …
What are the basic rules and idioms for operator overloading?
Dec 12, 2010 · Overloading unary minus and plus is not very common and probably best avoided. If needed, they should probably be overloaded as member functions. 1 Also note that the …
How to explain C pointers (declaration vs. unary operators) to a ...
Dec 15, 2014 · Q: How to explain C pointers (declaration vs. unary operators) to a beginner? A: don't. Explain pointers to the beginner, and show them how to represent their pointer concepts …
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 …
Ternary operator in PowerShell - Stack Overflow
Jul 10, 2015 · From what I know, PowerShell doesn't seem to have a built-in expression for the so-called ternary operator. For example, in the C language, which supports the ternary …