Question

138

Javascript Regex Match()

rated 0 times [ 143] [ 5] / answers: 1 / hits: 15677 / 12 Years ago, mon, october 1, 2012, 12:00:00

I just want this function to return an int back based on a string but its not working
It will be either H or V followed by 1 or 2 digits.



IE: H1         return 99

    H09        return 91

    H10        return 90

    H50        return 50

    V1         return 1

    V05        return 5

    V11        return 11

    V50        return 50

spot will be my string thats going in.

get100YardVersionEugene: function(spot)

{

        var team = spot.match(/[A-Z]+/);

        var yard = spot.match(/([0-9]+)/);



        if (team == H)

        {

            return 100-yard;

        }

        else //V

        {

            return yard;

        }

    },

for some reason when its V9(or H9) it breaks but when i put in V09 it works.

Can someone tell me why?

EDIT: it breaks as in...
I have two variables start and end

so i have something like
start = get100YardVersionEugene(V9)

and I use start and end to draw it on html5 canvas

start = get100YardVersionEugene(V9) //doesn't draw correctly
start = get100YardVersionEugene(V09) // draw correctly

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freddiejarretk

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1 Year ago

answered 12 Years ago jazminkyrap · Accepted Answer

You can simplify your regex a little so it only checks for H or V.

regarding the number, you need to remember that match returns an Array, so you'll need to get the value by index. Also, you shouldn't need the capture group.

And actually, you should really just use one regex.

get100YardVersionEugene: function(spot)

{

     var parts = spot.match(/(H|V)([0-9]+)/);

     if (parts) {

        if (parts[1] == H)

        {

            return 100-(+parts[2] || 0);

        }

        else //V

        {

            return +parts[2];

        }

    }

},