Number Formatting
// generic positive number decimal formatting function
function format (expr, decplaces) {
var str = "" + Math.round (eval(expr) * Math.pow(10,decplaces))
while (str.length <= decplaces) {
str = "0" + str
}
var decpoint = str.length - decplaces
return str.substring(0,decpoint) + "." + str.substring(decpoint,str.length);
}
function dollarize (expr) {
return "$" + format(expr,2)
}
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