CODEWITHSUNDEEP
javascriptandroidtitanium
lol2x
lol2x

Reputation: 451

Uncaught TypeError: Cannot read property '1' of null

Im getting an error: Uncaught TypeError: Cannot read property '1' of null Source: X.push( check [ 1 ]);

what is the problem?

wspolrzedne.value = text typed in textArea like that: "2.4 5 1 67 15 67"

So maybe the problem is becouse titanium do not safe that string with \n as new line?

var coordinates = wspolrzedne.value.split( "\n" );
    var X = [];
    var Y = [];


    for( var i = 0; i < coordinates.length; ++i ) {
        var check = coordinates[ i ].match( /^([0-9]+.[0-9]*) ([0-9]+.[0-9]*)$/ ); 

        if( check == false) {
                var zlewspolrzedne = Ti.UI.createAlertDialog({
                title: "Niew?a?ciwe wspó?rz?dne: " + coordinates[ i ],
                buttonNames: ['Popraw'],
                cancel: 0
            });
            zlewspolrzedne.show();
        }

        X.push( check[ 0 ] );
        Y.push( check[ 1 ] );    

    }

Upvotes: 6

Views: 24663

Answers (1)

user2509223
user2509223

Reputation:

This is because textArea doesn't care about linebreaks, its just a simple whitespace. So the solution is to split by '' and then concat each two of them (or feed every pair directly to the check array and check their content on the fly).

Edit:

Ok, so the problem is this line: 

var check = coordinates[ i ].match( /^([0-9]+.[0-9]*) ([0-9]+. [0-9]*)$/ )

It assigns only one value instead of two.

Upvotes: 2

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