xor with 3 values
One way would be to convert the Boolean values to an integer, add the results, and compare to 1.
operators
Is it possible to pass arithmetic operators to a method in java?
No, you can’t do that in Java. The compiler needs to know what your operator is doing. What you could do instead is an enum: public enum Operator { ADDITION(“+”) { @Override public double apply(double x1, double x2) { return x1 + x2; } }, SUBTRACTION(“-“) { @Override public double apply(double x1, double x2) { … Read more
No increment operator in VB.net
I would say that the language designers simply thought that BASIC was a better baseline than C, when designing Visual BASIC. You can follow the lineage of C (and, earlier, BCPL) through C++, Java and C#. The VB lineage comes from the original BASIC from Dartmouth (and, earlier, Fortran) and is a different beast altogether. … Read more
What does “+=” (plus equals) mean?
+= is a shorthand operator. someVar += otherVar is the same as someVar = someVar + otherVar
Variable assignment inside an ‘if’ condition in JavaScript
It has nothing to do with the if statement, but: if(a=2 && (b=8)) Here the last one, (b=8), actually returns 8 as assigning always returns the assigned value, so it’s the same as writing a = 2 && 8; And 2 && 8 returns 8, as 2 is truthy, so it’s the same as writing … Read more
How does double arrow (=>) operator work in Perl?
The => operator in perl is basically the same as comma. The only difference is that if there’s an unquoted word on the left, it’s treated like a quoted word. So you could have written Martin => 28 which would be the same as ‘Martin’, 28. You can make a hash from any even-length list, … Read more
What does mean “?” after variable in C#?
Well, ?. is a null-conditional operator https://msdn.microsoft.com/en-us/library/dn986595.aspx x?.y means return null if x is null and x.y otherwise ?? is a null-coalescing operator https://msdn.microsoft.com/en-us/library/ms173224.aspx x ?? y means if x == null return y, otherwise x Combining all the above helper?.Settings.HasConfig ?? false means: return false if helper == null or helper.Settings.HasConfig == null otherwise … Read more
What is the “??” operator for? [duplicate]
It’s the null coalescing operator. It was introduced in C# 2. The result of the expression a ?? b is a if that’s not null, or b otherwise. b isn’t evaluated unless it’s needed. Two nice things: The overall type of the expression is that of the second operand, which is important when you’re using … Read more
When to use the double not (!!) operator in JavaScript
In the context of if statements I’m with you, it is completely safe because internally, the ToBoolean operation will be executed on the condition expression (see Step 3 on the spec). But if you want to, lets say, return a boolean value from a function, you should ensure that the result will be actually boolean, … Read more
What does ,= mean in python?
It’s a form of tuple unpacking. With parentheses: (plot1,) = ax01.plot(t,yp1,’b-‘) ax01.plot() returns a tuple containing one element, and this element is assigned to plot1. Without that comma (and possibly the parentheses), plot1 would have been assigned the whole tuple. Observe the difference between a and b in the following example: >>> def foo(): … … Read more