[Ninjatogo]

Hi all,
I'm practicing building apps for BB10 using the Cascades framework, recently I ran into a problem when trying to do some simple addition and subtraction in my QML project. I've got a set of input boxes (prc0-9) that are blank by default (with hint text, but I can't imagine that would affect the results here). From my observations everything works perfectly if there is a number in all the input boxes, but if there is a single blank I get, "nan", in the output box (prof.text). I'd be grateful if someone could help me out here.

onClicked: {
			var int0 = parseInt(prc0.text);
			var int1 = parseInt(prc1.text);
			var int2 = parseInt(prc2.text);
			var int3 = parseInt(prc3.text);
			var int4 = parseInt(prc4.text);
			var int5 = parseInt(prc5.text);
			var int6 = parseInt(prc6.text);
			var int7 = parseInt(prc7.text);
			var int8 = parseInt(prc8.text);
			var int9 = parseInt(prc9.text);
			var int10 = int0+int1+int2+int3
					+int4+int5+int6+int7
					+int8+int9;
			var intbudg = parseInt(budg.text);
						if ( int10 > intbudg )
							{req.text = int10 - intbudg}
						else
							{req.text = "0"
							prof.text = intbudg - int10}
}

[PCMC]

I believe 'nan' is short for 'not a number'. I would bet when you try to add a blank instead of an integer the result is 'nan'. Maybe you can default the value in the boxes to 0?

*disclaimer* I know nothing of QML.

[mikeo007]

You need to add some logic to check if there is a number in each of the boxes.
If there isn't a number, then you can do something like set it to 0 or prompt the user to fill in all boxes before tapping the button.

NaN stands for "Not a Number"

[Ninjatogo]

I see; I don't want to fill the boxes with 0 and lose my fancy hint text so I'll trying making a quick check for blanks.

[mikeo007]

I see; I don't want to fill the boxes with 0 and lose my fancy hint text so I'll trying making a quick check for blanks.

You'll want to check for anything that's not a number, in case the user accidentally puts letters in the boxes.

[Ninjatogo]

I was simply going to check if it's blank and change the corresponding variable to 0. I don't know how to check the string for letters, but I'll do some searching.

[Ninjatogo]

I finally finished it. I decided to restrict the input mode to numbers and punctuation, so they can't type letters and put in an if statement that changes the field text to 0 if the field is blank on click. Thanks for the help!

[SCrid2000]

Looks kinda like java script, in which case you could do (if element != 'NaN')...

Posted using CrackBerry App on BB10

[mikeo007]

Looks kinda like java script, in which case you could do (if element != 'NaN')...

Posted using CrackBerry App on BB10

Or if you're using C++, include cmath and use: isnan(yournumber)
It will return true if it's not a number.