conversions

Documentation

Overview

Package conversions provides Gadgets that offer some form of data conversion process

Index

• func RoundPrec(x float64, prec int) float64
• type RangeMap
• type RangeMapData
  • func NewRangeMap() *RangeMapData
  • func NewRangeMapFrom(fromLo, fromHi, toLo, toHi int64) *RangeMapData
  • func (r *RangeMapData) Map(v int64) (int64, bool)
  • func (r *RangeMapData) MustMap(v int64) int64
  • func (r *RangeMapData) SetFromHi(v int64) bool
  • func (r *RangeMapData) SetFromLow(v int64) bool
  • func (r *RangeMapData) SetToHi(v int64) bool
  • func (r *RangeMapData) SetToLow(v int64) bool
  • func (r *RangeMapData) Valid() bool
• type RangeMapper
  • func (g *RangeMapper) Run()

Functions

func RoundPrec

func RoundPrec(x float64, prec int) float64

generic Precision rounding of float64 (go-lang-nuts discussion)

Types

type RangeMap

type RangeMap interface {
	Map(int64) int64
	SetToLow(int64) bool
	SetToHi(int64) bool
	SetFromLow(int64) bool
	SetFromHi(int64) bool
}

TODO: move this out to a generic package and call back in.

type RangeMapData

type RangeMapData struct {
	// contains filtered or unexported fields
}

func NewRangeMap

func NewRangeMap() *RangeMapData

NewRangeMap creates a RangeMap that must be provided a From/To range later otherwise its not valid

func NewRangeMapFrom

func NewRangeMapFrom(fromLo, fromHi, toLo, toHi int64) *RangeMapData

NewRangeMapFrom creates a RangeMap with the From/To values provided

func (*RangeMapData) Map

func (r *RangeMapData) Map(v int64) (int64, bool)

Map will transform the input (between fromLow, fromHi) to a value within the range (toLow, toHi) using this simple formula: = (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min; input is converted to float64 before calculations and the result is rounded back down to fit an int64 output, where 1.51 = 2 and 1.49=1 output is capped to stay within output range this is a generalised function for *MY* wide use-cases, there are many ways to get specific results faster and more efficiently

func (*RangeMapData) MustMap

func (r *RangeMapData) MustMap(v int64) int64

MustMap will panic if the Map function returns false, otherwise it silently returns Map value.

func (*RangeMapData) SetFromHi

func (r *RangeMapData) SetFromHi(v int64) bool

func (*RangeMapData) SetFromLow

func (r *RangeMapData) SetFromLow(v int64) bool

func (*RangeMapData) SetToHi

func (r *RangeMapData) SetToHi(v int64) bool

func (*RangeMapData) SetToLow

func (r *RangeMapData) SetToLow(v int64) bool

func (*RangeMapData) Valid

func (r *RangeMapData) Valid() bool

type RangeMapper

type RangeMapper struct {
	flow.Gadget
	Param flow.Input
	In    flow.Input
	Out   flow.Output
}

RangeMapper helps to convert an input value to an equivalent output value within a set scale

func (*RangeMapper) Run

func (g *RangeMapper) Run()

Gadget loop