String Error?

I might be wrong, but this sure smells like a bug. In the simulator. have not tried on device. latest patches and SDK.

var valX = 0;
var strX;
var strY;
var strZ;

strZ = valX ? "ft" : "m";

strX = "STRING X: " + strZ;
strY = "STRING Y: " + valX ? "ft" : "m";

System.println("Correct: " + strX);
System.println("Wrong: " + strY);

========================

Correct: STRING X: m
Wrong: ft

Former Member over 8 years ago

This is an operator precedence issue. The ternary operator has very low precedence and is evaluated after "STRING Y" + valX.

"STRING Y" + valX is "STRING Y0", which is not false, and selects the first ternary result.

Add some parentheses like this:

strY = "STRING Y: " + ( valX ? "ft" : "m" );

For reference, the operator precedence order in C is documented here: https://en.cppreference.com/w/c/lang...tor_precedence

I'm not sure if there are any differences from this precedence in Monkey C.

DaveBrillhart over 8 years ago

Thanks Brian! Makes sense.