Bigdecimal in JavaScript

BigDecimal in JavaScript

I like using accounting.js for number, money and currency formatting.

Homepage - https://openexchangerates.github.io/accounting.js/

Github - https://github.com/openexchangerates/accounting.js

How is BigDecimal represented in the JavaScript compiled by GWT

BigDecimal has no special treatment by the GWT Compiler. It's emulated with a bunch of fields, with a small optimization for the case where the value is in the java.lang.Double (equivalent to a JS Number) value range; but from the point of view of JS code, it's an opaque Object.

See https://github.com/gwtproject/gwt/blob/2.7.0/user/super/com/google/gwt/emul/java/math/BigDecimal.java#L523-L558

JavaScript validation form for big decimal

I solved this problem by simply splitting the numeric string after the dot (comma). With extreme data entered into the form, the fractional part is validated

function validateY(inp) {
    let elemY = ($('#y_set'))
    let c = (inp.value.replace(',','.'))
    c = c.split('.')
    c = Number(c[1])
    let val = Number((inp.value.replace(',','.')))
    if ( isNaN(val) || typeof(val) != "number" || elemY.val()==="" ){
            return false
    }else if (val === 5 && c > 0)  {
        return false
    }else if (val === -3 && c > 0)  {
        return false
    }
    return val <= 5 && val >= -3
}

c variable - (String split into integer and fraction).
5 and -3 are the extreme values ​​allowed in the form

Sorry if the code is bad, I'm still learning

Using Math.exp() in Javascript with BigDecimal for large floating point numbers

You should pass strings to BigDecimal:

var bar = new BigDecimal(Math.exp(foo).toString());

Nashorn: Strict equality comparing BigDecimal with number

This is an intentional change in JDK 1.8.0_101 and later, documented in JDK-8143896. The handling of strict equality must be intentional, since it is called out with a test case that covers BigDecimal being compared to an integer.

This isn't called out in the JDK release notes, but it can be confirmed as an intentional change in behavior.

Convert string to bigdecimal in javascript

First you want convert it into String using toString() method.Then stored it into double variable usind Double.parseDouble() method.

<script type="text/javascript">
var amount=bigdecimalvalue.toString();
double amountindouble=Double.parseDouble(amount);
</script>  

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