CODEWITHSUNDEEP
javascript
Ben Aidley
Ben Aidley

Reputation: 347

JS function that returns decimal format 1

I have written a function to_money so that 'Price' 'Quantity' and 'Total' in the sub_total function are formatted and two zeroes attached - so 2 becomes 2.00, the function is here:

 to_money: function(amount) {
      return Number(amount).toFixed(2) 
    },


sub_total: function() {
 var In = this
 return $$('.item').inject(0, function(sum, row) {
  var quantity = Number($F('Item' + row.id + 'Quantity'))
  var price = Number($F('Item' + row.id + 'Price'))
  var line_total = quantity * price
 $('Item' + row.id + 'Quantity').value = In.to_money(quantity) 
  $('Item' + row.id + 'Price').value = In.to_money(price)
  $('Item' + row.id + 'Total').update('£' + In.to_money(line_total)) In.to_money(line_total)) 
  return sum + line_total 
 })

How do I write a function that is similar to the function 'to money' that formats the price, but instead a function that formats the quantity for making sure a default decimal of 1 is prefixed to the quantity if no input is entered.

so the line in function sub_total would call the the new function to run on quantity:

 $('Item' + row.id + 'Quantity').value = In.to_decimal(quantity)

Would the function look like this?

to_decimal: function(amount) {
          return Number(amount).toFixed(0) 
        },

Upvotes: 4

Views: 447

Answers (1)

KooiInc
KooiInc

Reputation: 122986

try

to_decimal: function(amount) {
          var n = Number(amount);
          return (n && n>0 ? n : 1).toFixed(2);
}
In.to_decimal('');               //=> 1.00
In.to_decimal('bogusinput');     //=> 1.00
In.to_decimal(0);                //=> 1.00
In.to_decimal('23.1');           //=> 23.10
//note: Number autotrims the parameter
In.to_decimal('          45.3'); //=> 45.30

Upvotes: 3

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