#variable-assignment

Fixed Why does this go into an infinite loop? #dev #it #asnwer

Why does this go into an infinite loop?

I’m a teacher, and yesterday a student wrote the following code:

public class Tests { public static void main(String[] args) throws Exception { int x = 0; while(x<3) { x = x++; System.out.println(x); } } }

We know he should have writen just x++ or x=x+1, but on x = x++;it should first attribute x to itself, and later increment x. Why does x continue with…

How to: Operator precedence with Javascript Ternary operator

Operator precedence with Javascript Ternary operator

I cant seem to wrap my head around the first part of this code ( += ) in combination with the ternary operator.

h.className += h.className ? ' error' : 'error'

The way i think this code works is as following:

h.className = h.className + h.className ? ' error' : 'error'

But that isn’t correct because that gives a error in my console.

So my…

How to: How can I index a MATLAB array returned by a function without first assigning it to a local variable?

How can I index a MATLAB array returned by a function without first assigning it to a local variable?

For example, if I want to read the middle value from magic(5), I can do so like this:

M = magic(5); value = M(3,3);

to get value == 13. I’d like to be able to do something like one of these:

value = magic(5)(3,3); value = (magic(5))(3,3);

to dispense with the intermediate variable. However,…