The Open Source BlitzMax Compiler Project.
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View Code? Open in Web Editor NEWUseful maths functionality
Useful maths functionality
Previous FR here: brl.mod #226
Nice to see a math category!
Perhaps round with decimal precision and a round function that returns a string with the unnecessary bits removed from the end would be a good fit in here somewhere? (math.round or similar?)
I came up with the following solution, but I guess it'd be better to use snprintf directly instead of using TStringBuilder or perhaps there's another even better solution altogether - but here goes:
Private
Global sb:TStringBuilder = New TStringBuilder()
Public
Rem
bbdoc:
EndRem
Function RoundToString:String(val:Double, decimals:Int)
sb.SetLength(0)
sb.FormatDouble("%." + decimals + "f", val)
Return sb.ToString()
EndFunction
Rem
bbdoc:
EndRem
Function Round:Double(val:Double, decimals:Int)
Return Double(RoundToString(val, decimals))
EndFunction
Rem
bbdoc:
EndRem
Function RoundToString:String(val:Double, decimals:Int, pretty:Int)
Local str:String = RoundToString(val, decimals)
If Not pretty
Return str
EndIf
For Local i:Int = str.length-1 To 0 Step -1
If str[i] = 48
Continue
EndIf
If str[i] = 46
Return str[..i]
EndIf
Return str[..i+1]
Next
EndFunction
Thanks and a have pleasant day!
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