Question

I have a bunch of strings extracted from html using jQuery.

They look like this:

var productBeforePrice = "DKK 399,95";
var productCurrentPrice = "DKK 299,95";

I need to extract the number values in order to calculate the price difference.

(So I wend up with ≈

var productPriceDiff = DKK 100";

or just:

var productPriceDiff = 100";)

Can anyone help me do this?

Thanks,
Jakob

Answer 1

First you need to convert the input prices from strings to numbers. Then subtract. And you’ll have to convert the result back to “DKK ###,##” format. These two functions should help.

var priceAsFloat = function (price) {  
   return parseFloat(price.replace(/\./g, '').replace(/,/g,'.').replace(/[^\d\.]/g,''));
}

var formatPrice = function (price) {  
   return 'DKK ' + price.toString().replace(/\./g,',');
}

Then you can do this:

var productBeforePrice = "DKK 399,95"; 
var productCurrentPrice = "DKK 299,95";
productPriceDiff = formatPrice(priceAsFloat(productBeforePrice) - priceAsFloat(productCurrentPrice));