gnum

package
v0.0.0-...-bad6181 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Apr 13, 2024 License: GPL-3.0 Imports: 18 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	Billion = 1000000000
	Million = 1000000
	Kilo    = 1000
)
View Source 
const (
	GoldenRatio = 0.618
)
View Source 
const (
	// MaxUint24 maximum value of uint24 variable
	MaxUint24 = 1<<24 - 1
)

Variables

View Source 
var (
	Decimal0 = Decimal(decimal.Zero)
	Decimal1 = NewDecimalFromInt(1)
)
View Source 
var (
	PosInf = math.Inf(1)
	NegInf = math.Inf(-1)
)

Functions

func AddSS 

func AddSS(inReal0, inReal1 []float64) []float64

func AddSV 

func AddSV(inReal []float64, v float64) []float64

func Avg 

func Avg(inReal []float64, timePeriod int) []float64

Avg - Vector average

func BaseConvert 

func BaseConvert(num string, fromBase, toBase int) (string, error)

func BigIntToFloat64 

func BigIntToFloat64(it *big.Int) float64

func BiggerEqualThan 

func BiggerEqualThan(left, right *big.Int) bool

func BiggerThan 

func BiggerThan(left, right *big.Int) bool

func BoundUint32 

func BoundUint32(min, toBound, max uint32) uint32

给toBound划界，不超过[min, max]的范围

func CmpInt64Array 

func CmpInt64Array(a, b []int64) bool

func ContainsInt 

func ContainsInt(src []int, toFind int) bool

func DetectMaxPrec 

func DetectMaxPrec(vals []ElegantFloat, humanReadPrec int) int

func DetectMaxPrecRaw 

func DetectMaxPrecRaw(vals []float64, humanReadPrec int) int

func DetectPrecByHumanReadPrec 

func DetectPrecByHumanReadPrec(val float64, humanReadPrec int) int

func ElegantFloatArrayToFloatArray 

func ElegantFloatArrayToFloatArray(in []ElegantFloat) []float64

func Fibonacci 

func Fibonacci(n int) int

func Float64ToByte 

func Float64ToByte(f float64) []byte

Converts the float64 into an uint64 without changing the bits, it's the way the bits are interpreted that change. big endian references: https://stackoverflow.com/questions/37758267/golang-float64bits https://stackoverflow.com/questions/43693360/convert-float64-to-byte-array

func Float64ToByteLE 

func Float64ToByteLE(f float64) []byte

little endian

func FloatAlmostEqual 

func FloatAlmostEqual(a, b float64) bool

func FloatsEqual 

func FloatsEqual(a, b []float64) bool

func FloatsPtrToFloats 

func FloatsPtrToFloats(in []*float64) []float64

func FloatsToFloatsPtr 

func FloatsToFloatsPtr(in []float64) []*float64

func Format 

func Format(num any, base int) (string, error)

func FormatAnySys 

func FormatAnySys(numberSystemDigits []rune, n big.Int) string

Format number to string in specified number system. Length of 'numberSystemDigits' is number system length. Reference: https://github.com/kenticny/numconvert/blob/master/converter.go

func FormatFloat64 

func FormatFloat64(f float64, prec int) string

func FormatInt 

func FormatInt(i int) string

func FormatInt64 

func FormatInt64(i int64) string

func FormatUint16 

func FormatUint16(u uint16) string

func FormatUint32 

func FormatUint32(u uint32) string

func FormatUint64 

func FormatUint64(u uint64) string

func FormatUint8 

func FormatUint8(u uint8) string

func GetDefaultDigits 

func GetDefaultDigits() []rune

func GetLast1 

func GetLast1(v int) int

199012 -> 2

func GetLast2 

func GetLast2(v int) int

199012 -> 12

func IsDigit 

func IsDigit(s string) bool

123 00123 +123 -123 123.456 2.07539829195e-05

func IsEvenInt64 

func IsEvenInt64(n int64) bool

func IsEvenUint64 

func IsEvenUint64(n uint64) bool

func IsOddInt64 

func IsOddInt64(n int64) bool

func IsOddUint64 

func IsOddUint64(n uint64) bool

func IsZero 

func IsZero(val *big.Int) bool

func JoinFormatInt 

func JoinFormatInt(sep string, num ...int) string

func Max 

func Max(numTypeSample any) (any, error)

func MaxFloat 

func MaxFloat(args ...float64) float64

func MaxFloat64 

func MaxFloat64(first float64, args ...float64) float64

func MaxInt 

func MaxInt(first int, args ...int) int

func MaxInt64 

func MaxInt64(first int64, args ...int64) int64

func MaxPrec 

func MaxPrec(in []Decimal) int

func MaxSS 

func MaxSS(inReal0, inReal1 []float64) []float64

func MaxSV 

func MaxSV(inReal []float64, inTimePeriod int) []float64

func MaxUint32 

func MaxUint32(first uint32, args ...uint32) uint32

func MaxUint64 

func MaxUint64(first uint64, args ...uint64) uint64

func Mean 

func Mean(values []float64) float64

Mean (均值)

func Min 

func Min(numTypeSample any) (any, error)

func MinFloat 

func MinFloat(args ...float64) float64

func MinFloat64 

func MinFloat64(first float64, args ...float64) float64

func MinInt 

func MinInt(first int, args ...int) int

func MinInt64 

func MinInt64(first int64, args ...int64) int64

func MinSS 

func MinSS(inReal0, inReal1 []float64) []float64

func MinSV 

func MinSV(inReal []float64, inTimePeriod int) []float64

func MinUint32 

func MinUint32(first uint32, args ...uint32) uint32

func MinUint64 

func MinUint64(first uint64, args ...uint64) uint64

func MinUintArray 

func MinUintArray(args []uint) uint

func MulSS 

func MulSS(inReal0, inReal1 []float64) []float64

func MulSV 

func MulSV(inReal []float64, v float64) []float64

func MustMax 

func MustMax(numTypeSample any) any

func MustMin 

func MustMin(numTypeSample any) any

func ParseAnySys 

func ParseAnySys(numberSystemDigits []rune, s string) (*big.Int, error)

Parse string as specified number system.

func ParseBigInt 

func ParseBigInt(num string, base int) (big.Int, error)

func ParseFloat64 

func ParseFloat64(s string) (float64, error)

func RealGoldenRatio 

func RealGoldenRatio() float64

func RemoveDuplicate 

func RemoveDuplicate(elements []int) []int

func RemoveLast1 

func RemoveLast1(v int) int

199012 -> 19901

func RemoveLast2 

func RemoveLast2(v int) int

199012 -> 1990

func RemoveUint 

func RemoveUint(src []uint, toRemove uint, removeCount int) []uint

func ReverseBigFloats 

func ReverseBigFloats(in []big.Float)

func ReverseBigInts 

func ReverseBigInts(in []big.Int)

func ReverseFloats 

func ReverseFloats(in []float64)

func ReverseInt64s 

func ReverseInt64s(in []int64)

func ReverseInts 

func ReverseInts(in []int)

func ReverseUints 

func ReverseUints(in []uint)

func SetHead0 

func SetHead0(inReal []float64, count int)

func Slice 

func Slice(v int64, begin, len int) (int64, error)

SliceBetweenEqual(19901201, 4, 2) -> 12 SliceBetweenEqual(-19901201, 4, 2) -> 12

func SmallerEqualThan 

func SmallerEqualThan(left, right *big.Int) bool

func SmallerThan 

func SmallerThan(left, right *big.Int) bool

func SortBigFloats 

func SortBigFloats(in []big.Float)

func SortBigInts 

func SortBigInts(in []big.Int)

func SortFloats 

func SortFloats(in []float64)

func SortInt64s 

func SortInt64s(in []int64)

func SortInts 

func SortInts(in []int)

func SortUints 

func SortUints(in []uint)

func Std 

func Std(values []float64, ddof int) float64

Standard Deviation (均方差) ddof: Delta Degrees of Freedom. The divisor used in calculations is N - ddof, where N represents the number of elements. By default ddof is zero.

func SubSS 

func SubSS(inReal0, inReal1 []float64) []float64

func SubSV 

func SubSV(inReal []float64, v float64) []float64

func Sum 

func Sum(values []float64) float64

Sum (和)

func SumFloat 

func SumFloat(args ...float64) float64

func ToFloat64s 

func ToFloat64s(in []Decimal) []float64

Types

type Decimal 

type Decimal decimal.Decimal

func MaxDecimal 

func MaxDecimal(first Decimal, args ...Decimal) Decimal

func MinDecimal 

func MinDecimal(first Decimal, args ...Decimal) Decimal

func NewDecimalFromAny 

func NewDecimalFromAny(val any) (*Decimal, error)

func NewDecimalFromBigFloat 

func NewDecimalFromBigFloat(val big.Float) (Decimal, error)

func NewDecimalFromBigInt 

func NewDecimalFromBigInt(val big.Int) Decimal

TODO: test required

func NewDecimalFromDecimal 

func NewDecimalFromDecimal(d2 decimal.Decimal) Decimal

func NewDecimalFromFloat32 

func NewDecimalFromFloat32(val float32) Decimal

func NewDecimalFromFloat64 

func NewDecimalFromFloat64(val float64) Decimal

func NewDecimalFromInt 

func NewDecimalFromInt(val int) Decimal

func NewDecimalFromInt16 

func NewDecimalFromInt16(val int16) Decimal

func NewDecimalFromInt32 

func NewDecimalFromInt32(val int32) Decimal

func NewDecimalFromInt64 

func NewDecimalFromInt64(val int64) Decimal

func NewDecimalFromInt8 

func NewDecimalFromInt8(val int8) Decimal

func NewDecimalFromString 

func NewDecimalFromString(val string) (Decimal, error)

func NewDecimalFromStringEx 

func NewDecimalFromStringEx(val string, prec int) (Decimal, error)

func NewDecimalFromUint 

func NewDecimalFromUint(val uint) Decimal

func NewDecimalFromUint16 

func NewDecimalFromUint16(val uint16) Decimal

func NewDecimalFromUint32 

func NewDecimalFromUint32(val uint32) Decimal

func NewDecimalFromUint64 

func NewDecimalFromUint64(val uint64) Decimal

func NewDecimalFromUint8 

func NewDecimalFromUint8(val uint8) Decimal

func (Decimal) Abs 

func (d Decimal) Abs() Decimal

func (Decimal) Add 

func (d Decimal) Add(d2 Decimal) Decimal

func (Decimal) AddFloat64 

func (d Decimal) AddFloat64(n float64) Decimal

func (Decimal) AddInt 

func (d Decimal) AddInt(n int) Decimal

func (Decimal) BitsAfterDecimalPoint 

func (d Decimal) BitsAfterDecimalPoint(countTail0 bool) int

BitsAfterDecimalPoint returns decimal precision. NOTE: When countTail0 is true, the 0 in the tail is also counted as precision.

func (*Decimal) Conv 

func (d *Decimal) Conv(sample any, allowFractionalLoss bool) (any, error)

Conv converts decimal to a number which has same type with `sample`.

func (Decimal) Div 

func (d Decimal) Div(d2 Decimal) Decimal

func (Decimal) DivFloat64 

func (d Decimal) DivFloat64(n float64) Decimal

func (Decimal) DivInt 

func (d Decimal) DivInt(n int) Decimal

func (Decimal) DivRound 

func (d Decimal) DivRound(d2 Decimal, precision int) Decimal

FIXME： 这个是RoundUp还是RoundDown？

func (Decimal) DivRoundDown 

func (d Decimal) DivRoundDown(d2 Decimal, precision int) Decimal

func (Decimal) DivRoundFloat64 

func (d Decimal) DivRoundFloat64(d2 float64, precision int) Decimal

func (Decimal) DivRoundInt 

func (d Decimal) DivRoundInt(d2 int, precision int) Decimal

func (Decimal) Equal 

func (d Decimal) Equal(cmp Decimal) bool

func (Decimal) EqualFloat64 

func (d Decimal) EqualFloat64(cmp float64) bool

func (Decimal) EqualInt 

func (d Decimal) EqualInt(cmp int) bool

func (Decimal) Float64 

func (d Decimal) Float64() float64

func (Decimal) Float64Ex 

func (d Decimal) Float64Ex() (val float64, exact bool)

func (Decimal) GreaterThan 

func (d Decimal) GreaterThan(cmp Decimal) bool

func (Decimal) GreaterThanFloat64 

func (d Decimal) GreaterThanFloat64(cmp float64) bool

func (Decimal) GreaterThanInt 

func (d Decimal) GreaterThanInt(cmp int) bool

func (Decimal) GreaterThanOrEqual 

func (d Decimal) GreaterThanOrEqual(cmp Decimal) bool

func (Decimal) GreaterThanOrEqualFloat64 

func (d Decimal) GreaterThanOrEqualFloat64(cmp float64) bool

func (Decimal) GreaterThanOrEqualInt 

func (d Decimal) GreaterThanOrEqualInt(cmp int) bool

func (Decimal) Int64Part 

func (d Decimal) Int64Part() int64

func (Decimal) IntPart 

func (d Decimal) IntPart() int

func (Decimal) IsInterger 

func (d Decimal) IsInterger() bool

func (Decimal) IsNegative 

func (d Decimal) IsNegative() bool

func (Decimal) IsPositive 

func (d Decimal) IsPositive() bool

func (Decimal) IsZero 

func (d Decimal) IsZero() bool

func (Decimal) LessThan 

func (d Decimal) LessThan(cmp Decimal) bool

func (Decimal) LessThanFloat64 

func (d Decimal) LessThanFloat64(cmp float64) bool

func (Decimal) LessThanInt 

func (d Decimal) LessThanInt(cmp int) bool

func (Decimal) LessThanOrEqual 

func (d Decimal) LessThanOrEqual(cmp Decimal) bool

func (Decimal) LessThanOrEqualFloat64 

func (d Decimal) LessThanOrEqualFloat64(cmp float64) bool

func (Decimal) LessThanOrEqualInt 

func (d Decimal) LessThanOrEqualInt(cmp int) bool

func (Decimal) MarshalBSONValue 

func (d Decimal) MarshalBSONValue() (bsontype.Type, []byte, error)

in BSON, Decimal128 could has 34 numbers after decimal point, it will loss precision if more than 34 numbers after decimal point so we serialize Decimal into string, just like in JSON. in BSON, omitempty of Decimal works reference: https://github.com/hackeryard/configcenter/blob/a9638f554b4cf47fb13c37c5c3611e1e0696fd25/src/common/metadata/time.go#L94

func (Decimal) MarshalBinary 

func (d Decimal) MarshalBinary() (data []byte, err error)

func (Decimal) MarshalJSON 

func (d Decimal) MarshalJSON() ([]byte, error)

NOTE: if omitempty required in JSON, use *Decimal in your structure, no other way to implement this even you change source code MarshalJSON function in shopsprint/decimal

func (Decimal) MarshalJSONWithoutQuotes 

func (d Decimal) MarshalJSONWithoutQuotes() ([]byte, error)

WARNING: this is dangerous for decimals with many digits, since many JSON unmarshallers (ex: Javascript's) will unmarshal JSON numbers to IEEE 754 double-precision floating point numbers, which means you can potentially silently lose precision.

func (Decimal) MarshalText 

func (d Decimal) MarshalText() (text []byte, err error)

func (Decimal) Mul 

func (d Decimal) Mul(d2 Decimal) Decimal

func (Decimal) MulFloat64 

func (d Decimal) MulFloat64(n float64) Decimal

func (Decimal) MulInt 

func (d Decimal) MulInt(n int) Decimal

func (*Decimal) SetFloat64 

func (d *Decimal) SetFloat64(val float64)

func (*Decimal) SetInt 

func (d *Decimal) SetInt(val int)

func (Decimal) String 

func (d Decimal) String() string

func (Decimal) Sub 

func (d Decimal) Sub(d2 Decimal) Decimal

func (Decimal) SubFloat64 

func (d Decimal) SubFloat64(n float64) Decimal

func (Decimal) SubInt 

func (d Decimal) SubInt(n int) Decimal

func (*Decimal) ToBSONDecimal128 

func (d *Decimal) ToBSONDecimal128() (primitive.Decimal128, error)

WARN: BSON Decimal128 has max 34 number after "." but Decimal doesn't have this limit (limited by your memory)

func (*Decimal) ToElegantFloat 

func (d *Decimal) ToElegantFloat() ElegantFloat

func (Decimal) Trunc 

func (d Decimal) Trunc(prec int, step float64) Decimal

prec就是小数点后最多支持多少位

func (Decimal) Trunc2 

func (d Decimal) Trunc2(min Decimal, step float64) Decimal

min 就是小数点后最多多少位的小数写法，比如，min=0.00001，prec就是5

func (Decimal) TurnPositiveNegative 

func (d Decimal) TurnPositiveNegative() Decimal

func (*Decimal) UnmarshalBSONValue 

func (d *Decimal) UnmarshalBSONValue(t bsontype.Type, data []byte) error

func (*Decimal) UnmarshalBinary 

func (d *Decimal) UnmarshalBinary(b []byte) error

func (*Decimal) UnmarshalJSON 

func (d *Decimal) UnmarshalJSON(b []byte) error

func (*Decimal) UnmarshalText 

func (d *Decimal) UnmarshalText(text []byte) error

func (Decimal) WithPrec 

func (d Decimal) WithPrec(prec int) Decimal

type ElegantFloat 

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

original -> prec: 2 -> humanReadPrec: 2 37 -> 37.00 -> 37.00 12237.89374 -> 12237.89 -> 12237.89 3.3483300000000003 -> 3.35 -> 3.35 0.00883300000000003 -> 0.01 -> 0.0088 0.000012800003 -> 0.00 -> 0.000013

func NewElegantFloat 

func NewElegantFloat(val float64, prec int) ElegantFloat

func NewElegantFloatArray 

func NewElegantFloatArray(vals []float64, prec int) []ElegantFloat

func NewElegantFloatPtrArray 

func NewElegantFloatPtrArray(vals []*float64, prec int) []*ElegantFloat

func NewElegantFloatPtrArray2 

func NewElegantFloatPtrArray2(vals []float64, prec int) []*ElegantFloat

func NewElegantFloatPtrArray3 

func NewElegantFloatPtrArray3(vals []float64, prec int, nilVal float64) []*ElegantFloat

func ToElegantFloat64s 

func ToElegantFloat64s(in []Decimal) []ElegantFloat

func (*ElegantFloat) JSON 

func (t *ElegantFloat) JSON(fmtNaNasNull bool) ([]byte, error)

What will happen if value is math.NaN? it will output bytes buffer `"NaN"`

func (ElegantFloat) MarshalJSON 

func (t ElegantFloat) MarshalJSON() ([]byte, error)

MarshalJSON will marshal using 2006-01-02T15:04:05+07:00 layout

FIXME if t.val = math.NaN and t.JSON(false), json.Marshal(t) will output error: json: error calling MarshalJSON for type *gnum.ElegantFloat: invalid character 'N' looking for beginning of value why and how to fix?

func (*ElegantFloat) Raw 

func (t *ElegantFloat) Raw() float64

func (*ElegantFloat) SetHumanReadPrec 

func (t *ElegantFloat) SetHumanReadPrec(humanReadPrec int)

func (*ElegantFloat) SetPrec 

func (t *ElegantFloat) SetPrec(prec int)

func (*ElegantFloat) String 

func (t *ElegantFloat) String() string

func (*ElegantFloat) UnmarshalJSON 

func (t *ElegantFloat) UnmarshalJSON(b []byte) error

TODO: NaN +-Inf会被ParseFloat64认为是错误吗，需要测试一下 UnmarshalJSON will unmarshal using 2006-01-02T15:04:05+07:00 layout

type Uint24 

type Uint24 [3]uint8

Uint24 type

func NewUint24 

func NewUint24(val uint32) Uint24

NewUint24 creates a new uint24 type

func NewUint24FromBytes 

func NewUint24FromBytes(b [3]byte) Uint24

func (Uint24) String 

func (u Uint24) String() string

String converts uint24 to string

func (Uint24) ToBytes 

func (u Uint24) ToBytes() []byte

ToBytes converts uint24 to bytes array

func (Uint24) Uint32 

func (u Uint24) Uint32() uint32

Uint32 converts uint24 to uint32

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