132: Dealing with Money in programming

In this mini fragment Kaushik talks about dealing with the Money object. With money we need decimals, but the obvious solution of using a float or double may not work as advertised. Listen to this episode to find out why and how you can go about dealing with this.

Show Notes

• The infamous Short - Ep029: All about the infamous 65,536 dex method count
• IEEE_754 float storage format
• How binary fractions work

Problematic snippet 1:

println(1.03-0.42) # prints 0.6100000000000001

Problematic snippet 2:

var x = 0F
(1..100).forEach { i ->
    x += 0.01F
}
println(x) # 0.99999934 vs 1

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Contact

• @fragmentedcast [twitter.com]
• @donnfelker and +DonnFelker
• @kaushikgopal and +KaushikGopalIsMe