说明
golang isnan示例是从最受好评的开源项目中提取的实现代码，你可以参考下面示例的使用方式。
编程语言: Golang
命名空间/包名称: math
示例#1
文件：
run_test.go
项目：
goulash/stat
func TestRunSeries(z *testing.T) {
assert := assert.New(z)
var assertFloat = func(a, b float64) {
if math.IsNaN(a) && math.IsNaN(b) {
return // ok
}
assert.Equal(a, b)
}
tests := []Series{
{1, 2, 3, 4, 5},
{0.38809179, 0.94113008, 0.15350705, 0.03311646, 0.68168087, 0.21719990},
{0.32123922, 0.57085251, 0.53576882, 0.38965630, 0.27487263, 0.90783122},
{0, 0, 0, 0, 0},
{-1, -2, -3},
{},
}
for _, t := range tests {
var r Run
for _, f := range t {
r.Add(f)
}
assertFloat(t.Min(), r.Min())
assertFloat(t.Max(), r.Max())
assertFloat(t.Mean(), r.Mean())
assertFloat(t.Var(), r.Var())
assertFloat(t.Std(), r.Std())
assertFloat(t.VarP(), r.VarP())
assertFloat(t.StdP(), r.StdP())
}
}示例#2
文件：
evaluate.go
项目：
vozhyk-/gohan
func calculateLessThan(left Value, right Value, leftFirst bool) _lessThanResult {
x := Value{}
y := x
if leftFirst {
x = toNumberPrimitive(left)
y = toNumberPrimitive(right)
} else {
y = toNumberPrimitive(right)
x = toNumberPrimitive(left)
}
result := false
if x.kind != valueString || y.kind != valueString {
x, y := x.float64(), y.float64()
if math.IsNaN(x) || math.IsNaN(y) {
return lessThanUndefined
}
result = x < y
} else {
x, y := x.string(), y.string()
result = x < y
}
if result {
return lessThanTrue
}
return lessThanFalse
}示例#3
文件：
value.go
项目：
Codzart/go-ethereum
func strictEqualityComparison(x Value, y Value) bool {
if x.kind != y.kind {
return false
}
result := false
switch x.kind {
case valueUndefined, valueNull:
result = true
case valueNumber:
x := x.float64()
y := y.float64()
if math.IsNaN(x) && math.IsNaN(y) {
result = false
} else {
result = x == y
}
case valueString:
result = x.string() == y.string()
case valueBoolean:
result = x.bool() == y.bool()
case valueObject:
result = x._object() == y._object()
default:
panic(hereBeDragons())
}
return result
}示例#4
文件：
graphics.go
项目：
johnvilsack/golang-stuff
// GenericBoxes draws box plots. (Default implementation for box plots).
// The values for each box in boxes are in screen coordinates!
func GenericBoxes(bg BasicGraphics, boxes []Box, width int, style Style) {
if width%2 == 0 {
width += 1
}
hbw := (width - 1) / 2
for _, d := range boxes {
x := int(d.X)
q1, q3 := int(d.Q1), int(d.Q3)
// DebugLogger.Printf("q1=%d q3=%d q3-q1=%d", q1,q3,q3-q1)
bg.Rect(x-hbw, q1, width, q3-q1, style)
if !math.IsNaN(d.Med) {
med := int(d.Med)
bg.Line(x-hbw, med, x+hbw, med, style)
}
if !math.IsNaN(d.Avg) {
bg.Symbol(x, int(d.Avg), style)
}
if !math.IsNaN(d.High) {
bg.Line(x, q3, x, int(d.High), style)
}
if !math.IsNaN(d.Low) {
bg.Line(x, q1, x, int(d.Low), style)
}
for _, y := range d.Outliers {
bg.Symbol(x, int(y), style)
}
}
}示例#5
文件：
datum.go
项目：
nvanbenschoten/cockroach
// Compare implements the Datum interface.
func (d *DFloat) Compare(other Datum) int {
if other == DNull {
// NULL is less than any non-NULL value.
return 1
}
v, ok := other.(*DFloat)
if !ok {
cmp, ok := mixedTypeCompare(d, other)
if !ok {
panic(makeUnsupportedComparisonMessage(d, other))
}
return cmp
}
if *d < *v {
return -1
}
if *d > *v {
return 1
}
// NaN sorts before non-NaN (#10109).
if *d == *v {
return 0
}
if math.IsNaN(float64(*d)) {
if math.IsNaN(float64(*v)) {
return 0
}
return -1
}
return 1
}示例#6
文件：
boogie.go
项目：
nlefler/VictoryBoogieWoogie
func PixelDistance(image image.Image, x, y int, r, g, b, a uint32) float64 {
if x < image.Bounds().Min.X ||
y < image.Bounds().Min.Y ||
x > image.Bounds().Max.X ||
y > image.Bounds().Max.Y {
log.Printf("Invalid pixel at %d, %d", x, y)
return 0.0
}
targetR, targetG, targetB, targetA := image.At(x, y).RGBA()
distance := 0.0
distance += math.Pow(float64(r-targetR), 2)
if math.IsNaN(distance) {
log.Printf("Distance is NaN after red at %d, %d", x, y)
}
distance += math.Pow(float64(g-targetG), 2)
if math.IsNaN(distance) {
log.Printf("Distance is NaN after green at %d, %d", x, y)
}
distance += math.Pow(float64(b-targetB), 2)
if math.IsNaN(distance) {
log.Printf("Distance is NaN after blue at %d, %d", x, y)
}
distance += math.Pow(float64(a-targetA), 2)
if math.IsNaN(distance) {
log.Printf("Distance is NaN after alpha at %d, %d", x, y)
}
distance = math.Sqrt(distance)
if math.IsNaN(distance) {
log.Printf("Distance is NaN after sqrt at %d, %d", x, y)
}
return distance
}示例#7
文件：
expr.go
项目：
tsheasha/carbonapi
func (w *Windowed) Push(n float64) {
old := w.data[w.head]
w.length++
w.data[w.head] = n
w.head++
if w.head >= len(w.data) {
w.head = 0
}
if !math.IsNaN(old) {
w.sum -= old
w.sumsq -= (old * old)
} else {
w.nans--
}
if !math.IsNaN(n) {
w.sum += n
w.sumsq += (n * n)
} else {
w.nans++
}
}示例#8
文件：
config.go
项目：
kyeongdong/3
func noNaN(v data.Vector, pol int) data.Vector {
if math.IsNaN(v[X]) || math.IsNaN(v[Y]) || math.IsNaN(v[Z]) {
return data.Vector{0, 0, float64(pol)}
} else {
return v
}
}示例#9
文件：
pearson.go
项目：
nnuss/go-onlinestats
func Pearson(a, b []float64) float64 {
if len(a) != len(b) {
panic("len(a) != len(b)")
}
var abar, bbar float64
var n int
for i := range a {
if !math.IsNaN(a[i]) && !math.IsNaN(b[i]) {
abar += a[i]
bbar += b[i]
n++
}
}
nf := float64(n)
abar, bbar = abar/nf, bbar/nf
var numerator float64
var sumAA, sumBB float64
for i := range a {
if !math.IsNaN(a[i]) && !math.IsNaN(b[i]) {
numerator += (a[i] - abar) * (b[i] - bbar)
sumAA += (a[i] - abar) * (a[i] - abar)
sumBB += (b[i] - bbar) * (b[i] - bbar)
}
}
return numerator / (math.Sqrt(sumAA) * math.Sqrt(sumBB))
}示例#10
文件：
num.go
项目：
andydude/droscheme
func (o Sfloat64) Equal(n Any) bool {
m := n.(Sfloat64)
if math.IsNaN(float64(o)) && math.IsNaN(float64(m)) {
return false
}
return o == m
}示例#11
文件：
auxiliary.go
项目：
yunpeng1/gosl
func TestAbs(result, expected, absolute_error float64, test_description string) (status int) {
switch {
case math.IsNaN(result) || math.IsNaN(expected):
status = NaN
case math.IsInf(result, 0) || math.IsInf(expected, 0):
status = Inf
case (expected > 0 && expected < DBL_MIN) || (expected < 0 && expected > -DBL_MIN):
status = NotEqual
default:
if math.Abs(result-expected) > absolute_error {
status = NotEqual
} else {
status = Equal
}
}
if test_description != "" {
io.Pf(test_description)
switch status {
case NaN:
io.Pf(" [1;31mNaN[0m\n %v observed\n %v expected. diff = %v\n", result, expected, result-expected)
case Inf:
io.Pf(" [1;31mInf[0m\n %v observed\n %v expected. diff = %v\n", result, expected, result-expected)
case Equal:
io.Pf(" [1;32mOk[0m\n %v observed\n %v expected. diff = %v\n", result, expected, result-expected)
case NotEqual:
io.Pf(" [1;31mError[0m\n %v observed\n %v expected. diff = %v\n", result, expected, result-expected)
}
}
return
}示例#12
文件：
units.go
项目：
diffeo/go-coordinate
// PrioritizeWorkUnits changes the priorities of some number of work
// units. The actual work units are in options["work_unit_keys"]. A
// higher priority results in the work units being scheduled sooner.
func (jobs *JobServer) PrioritizeWorkUnits(workSpecName string, options map[string]interface{}) (bool, string, error) {
var (
err error
query coordinate.WorkUnitQuery
workSpec coordinate.WorkSpec
)
pwuOptions := PrioritizeWorkUnitsOptions{
Priority: math.NaN(),
Adjustment: math.NaN(),
}
workSpec, err = jobs.Namespace.WorkSpec(workSpecName)
if err == nil {
err = decode(&pwuOptions, options)
}
if err == nil && pwuOptions.WorkUnitKeys == nil {
return false, "missing work_unit_keys", err
}
if err == nil {
query.Names = pwuOptions.WorkUnitKeys
if !math.IsNaN(pwuOptions.Priority) {
err = workSpec.SetWorkUnitPriorities(query, pwuOptions.Priority)
} else if !math.IsNaN(pwuOptions.Adjustment) {
err = workSpec.AdjustWorkUnitPriorities(query, pwuOptions.Adjustment)
}
}
return err == nil, "", err
}示例#13
文件：
gotracker.go
项目：
etherealmachine/hivemind
func (t *GoTracker) updateWeights(vertex int) {
if t.board[vertex] != EMPTY {
for i := 0; i < 4; i++ {
adj := t.adj[vertex][i]
if adj != -1 && t.board[adj] == EMPTY {
t.updateWeights(adj)
}
}
} else {
black_weight := t.weights.Get(BLACK, vertex)
if black_weight != 0 {
weight := t.get_weight(BLACK, vertex)
if math.IsNaN(weight) {
black_weight = 0
} else if black_weight+weight > 0 {
black_weight += weight
}
}
t.weights.Set(BLACK, vertex, black_weight)
white_weight := t.weights.Get(WHITE, vertex)
if white_weight != 0 {
weight := t.get_weight(WHITE, vertex)
if math.IsNaN(weight) {
white_weight = 0
} else if white_weight+weight > 0 {
white_weight += weight
}
}
t.weights.Set(WHITE, vertex, white_weight)
}
}示例#14
文件：
server.go
项目：
robmerrell/btbboard
// parseAverages takes a slice of averages and returns a string representation for flot to graph
func parseAverages(averages []*models.Average, useBtcField bool) string {
var format string
if useBtcField {
format = "[%g, %.8f]"
} else {
format = "[%g, %.2f]"
}
parsed := ""
for i, average := range averages {
if math.IsNaN(average.Cryptsy.Usd) || math.IsNaN(average.Cryptsy.Btc) {
continue
}
timeIndex := float64(average.TimeBlock.Unix()) * 1000.0
var value float64
if useBtcField {
value = average.Cryptsy.Btc
} else {
value = average.Cryptsy.Usd
}
parsed += fmt.Sprintf(format, timeIndex, value)
if i < len(averages)-1 {
parsed += ","
}
}
return parsed
}示例#15
文件：
functions.go
项目：
PrFalken/prometheus
// === changes(matrix model.ValMatrix) Vector ===
func funcChanges(ev *evaluator, args Expressions) model.Value {
in := ev.evalMatrix(args[0])
out := make(vector, 0, len(in))
for _, samples := range in {
changes := 0
prev := model.SampleValue(samples.Values[0].Value)
for _, sample := range samples.Values[1:] {
current := sample.Value
if current != prev && !(math.IsNaN(float64(current)) && math.IsNaN(float64(prev))) {
changes++
}
prev = current
}
rs := &sample{
Metric: samples.Metric,
Value: model.SampleValue(changes),
Timestamp: ev.Timestamp,
}
rs.Metric.Del(model.MetricNameLabel)
out = append(out, rs)
}
return out
}示例#16
文件：
example.go
项目：
ncsibra/xgo
func KindFromSides(a, b, c float64) Kind {
if math.IsNaN(a) || math.IsNaN(b) || math.IsNaN(c) {
return NaT
}
if a > b {
a, b = b, a
}
if b > c {
b, c = c, b
}
if a > b {
a, b = b, a
}
// sides are now sorted
switch {
case a <= 0:
return NaT
case a+b <= c: // triangle inequality
return NaT
case a == b:
if b == c {
return Equ
}
return Iso
case a == c || b == c:
return Iso
}
return Sca
}示例#17
文件：
positioning.go
项目：
raylee/gocnc
// Appends a position to the stack
func (vm *Machine) move(x, y, z float64) {
if math.IsNaN(x) || math.IsNaN(y) || math.IsNaN(z) {
panic("Internal failure: Move attempted with NaN value")
}
pos := Position{vm.State, x, y, z}
vm.Positions = append(vm.Positions, pos)
}示例#18
文件：
text.go
项目：
mike1372/chart
func (g *TextGraphics) Scatter(points []chart.EPoint, plotstyle chart.PlotStyle, style chart.Style) {
// First pass: Error bars
for _, p := range points {
xl, yl, xh, yh := p.BoundingBox()
if !math.IsNaN(p.DeltaX) {
g.tb.Line(int(xl), int(p.Y), int(xh), int(p.Y), '-')
}
if !math.IsNaN(p.DeltaY) {
g.tb.Line(int(p.X), int(yl), int(p.X), int(yh), '|')
}
}
// Second pass: Line
if (plotstyle&chart.PlotStyleLines) != 0 && len(points) > 0 {
lastx, lasty := int(points[0].X), int(points[0].Y)
for i := 1; i < len(points); i++ {
x, y := int(points[i].X), int(points[i].Y)
// fmt.Printf("LineSegment %d (%d,%d) -> (%d,%d)\n", i, lastx,lasty,x,y)
g.tb.Line(lastx, lasty, x, y, rune(style.Symbol))
lastx, lasty = x, y
}
}
// Third pass: symbols
if (plotstyle&chart.PlotStylePoints) != 0 && len(points) != 0 {
for _, p := range points {
g.tb.Put(int(p.X), int(p.Y), rune(style.Symbol))
}
}
// chart.GenericScatter(g, points, plotstyle, style)
}示例#19
文件：
evaluate_expression.go
项目：
couchbaselabs/otto
func calculateLessThan(left Value, right Value, leftFirst bool) _lessThanResult {
x := UndefinedValue()
y := x
if leftFirst {
x = toNumberPrimitive(left)
y = toNumberPrimitive(right)
} else {
y = toNumberPrimitive(right)
x = toNumberPrimitive(left)
}
result := false
if x._valueType != valueString || y._valueType != valueString {
x, y := x.toFloat(), y.toFloat()
if math.IsNaN(x) || math.IsNaN(y) {
return lessThanUndefined
}
result = x < y
} else {
x, y := x.toString(), y.toString()
result = x < y
}
if result {
return lessThanTrue
}
return lessThanFalse
}示例#20
文件：
functions.go
项目：
jcnnghm/plot
// Plot implements the Plotter interface, drawing a line
// that connects each point in the Line.
func (f *Function) Plot(c draw.Canvas, p *plot.Plot) {
trX, trY := p.Transforms(&c)
d := (p.X.Max - p.X.Min) / float64(f.Samples-1)
line := make([]draw.Point, f.Samples)
for i := range line {
x := p.X.Min + float64(i)*d
line[i].X = trX(x)
line[i].Y = trY(f.F(x))
}
// For every continuous block of non-NaN Y values, stroke lines
for i := 0; i < len(line); i++ {
if !math.IsNaN(float64(line[i].Y)) {
j := i + 1
for ; j < len(line); j++ {
if math.IsNaN(float64(line[j].Y)) {
break
}
}
c.StrokeLines(f.LineStyle, c.ClipLinesXY(line[i:j])...)
i = j
}
}
}示例#21
文件：
schema.go
项目：
elodina/stack-deploy
// Validate checks whether the given value is writeable to this schema.
func (*NullSchema) Validate(v reflect.Value) bool {
// Check if the value is something that can be null
switch v.Kind() {
case reflect.Interface:
return v.IsNil()
case reflect.Array:
return v.Cap() == 0
case reflect.Slice:
return v.IsNil() || v.Cap() == 0
case reflect.Map:
return len(v.MapKeys()) == 0
case reflect.String:
return len(v.String()) == 0
case reflect.Float32:
// Should NaN floats be treated as null?
return math.IsNaN(v.Float())
case reflect.Float64:
// Should NaN floats be treated as null?
return math.IsNaN(v.Float())
case reflect.Ptr:
return v.IsNil()
case reflect.Invalid:
return true
}
// Nothing else in particular, so this should not validate?
return false
}示例#22
文件：
datasource_abstract.go
项目：
untoldwind/gorrd
func (d *DatasourceAbstract) ProcessPdp(pdpValue float64, elapsed ElapsedPdpSteps, step time.Duration) float64 {
var preUnknown float64
if math.IsNaN(pdpValue) {
preUnknown = elapsed.PreInt
} else {
if math.IsNaN(d.PdpValue) {
d.PdpValue = 0
}
d.PdpValue += pdpValue / elapsed.Interval * elapsed.PreInt
}
var pdpTemp float64
if elapsed.Interval > float64(d.Heartbeat) || uint64(step/time.Second/2) < d.UnknownSecCount {
pdpTemp = math.NaN()
} else {
diffPdpSteps := (elapsed.Steps * uint64(step)) / uint64(time.Second)
pdpTemp = d.PdpValue / (float64(diffPdpSteps-d.UnknownSecCount) - preUnknown)
}
if math.IsNaN(pdpValue) {
d.UnknownSecCount = uint64(elapsed.PostInt)
d.PdpValue = math.NaN()
} else {
d.UnknownSecCount = 0
d.PdpValue = pdpValue / elapsed.Interval * elapsed.PostInt
}
return pdpTemp
}示例#23
文件：
call_iterator.go
项目：
oiooj/influxdb
// FloatStddevReduceSlice returns the stddev value within a window.
func FloatStddevReduceSlice(a []FloatPoint) []FloatPoint {
// If there is only one point then return 0.
if len(a) < 2 {
return []FloatPoint{{Time: ZeroTime, Nil: true}}
}
// Calculate the mean.
var mean float64
var count int
for _, p := range a {
if math.IsNaN(p.Value) {
continue
}
count++
mean += (p.Value - mean) / float64(count)
}
// Calculate the variance.
var variance float64
for _, p := range a {
if math.IsNaN(p.Value) {
continue
}
variance += math.Pow(p.Value-mean, 2)
}
return []FloatPoint{{
Time: ZeroTime,
Value: math.Sqrt(variance / float64(count-1)),
}}
}示例#24
文件：
optimizeGrad.go
项目：
kortschak/gofunopter
func (u *uniGradStruct) Initialize() error {
initLoc := u.loc.Init()
initObj := u.obj.Init()
initGrad := u.grad.Init()
// The initial values need to both be NaN or both not nan
if math.IsNaN(initObj) {
if !math.IsNaN(initGrad) {
return errors.New("gofunopter: cubic: initial function value and gradient must either both be set or neither set")
}
// Both nan, so compute the initial fuction value and gradient
initObj, initGrad, err := u.fun.ObjGrad(initLoc)
if err != nil {
return errors.New("gofunopter: cubic: error calling function during optimization")
}
u.obj.SetInit(initObj)
u.grad.SetInit(initGrad)
} else {
if math.IsNaN(initGrad) {
return errors.New("gofunopter: cubic: initial function value and gradient must either both be set or neither set")
}
}
err := optimize.Initialize(u.loc, u.obj, u.grad)
if err != nil {
return err
}
err = u.optimizer.Initialize(u.loc, u.obj, u.grad)
if err != nil {
return err
}
return nil
}示例#25
文件：
evaluate.go
项目：
vozhyk-/gohan
func (self *_runtime) evaluateDivide(left float64, right float64) Value {
if math.IsNaN(left) || math.IsNaN(right) {
return NaNValue()
}
if math.IsInf(left, 0) && math.IsInf(right, 0) {
return NaNValue()
}
if left == 0 && right == 0 {
return NaNValue()
}
if math.IsInf(left, 0) {
if math.Signbit(left) == math.Signbit(right) {
return positiveInfinityValue()
} else {
return negativeInfinityValue()
}
}
if math.IsInf(right, 0) {
if math.Signbit(left) == math.Signbit(right) {
return positiveZeroValue()
} else {
return negativeZeroValue()
}
}
if right == 0 {
if math.Signbit(left) == math.Signbit(right) {
return positiveInfinityValue()
} else {
return negativeInfinityValue()
}
}
return toValue_float64(left / right)
}示例#26
文件：
histogram.go
项目：
phil-mansfield/num
// InitBoundedLog initializes a Histogram instance from the given array
// of values with the given number of bins which fall between the given limits.
// The logarithms of bin centers are uniformly dist. Any
// values outside of these limits are ignored. The returned integer is the
// number of such ignored values. Because of this, infinte and non-positive
// values do not cause a panic.
//
// The first returned value is the initialized Histogram.
//
// InitBoundedLog panics if given a non-positive number of bins or
// a low bound as large or larger than the high bound or if given infinite bounds.
func (hist *Histogram) InitBoundedLog(xs []float64, binNum int, low, high float64) (*Histogram, int) {
if hist.init {
panic("stats.Histogram.InitBoundedLog called on initialized struct.")
} else if binNum < 1 {
panic(fmt.Sprintf("stats.Histogram.InitBoundedLog given binNum of %d", binNum))
} else if low >= high || low <= 0 || math.IsInf(low, 0) ||
math.IsInf(high, 0) || math.IsNaN(low) || math.IsNaN(high) {
panic(fmt.Sprintf("stats.Histogram.InitBoundedLog given range [%d, %d]", low, high))
}
hist.init = true
hist.Bins = make([]int, binNum)
hist.BinValues = make([]float64, binNum)
hist.BinEdges = make([]float64, binNum+1)
hist.logHistogram = true
hist.lowLim = math.Log(low)
hist.highLim = math.Log(high)
hist.binWidth = (hist.highLim - hist.lowLim) / float64(binNum)
for i := 0; i < binNum; i++ {
hist.BinEdges[i] = math.Exp(hist.lowLim + hist.binWidth*float64(i))
hist.BinValues[i] = math.Exp(hist.lowLim + hist.binWidth*(float64(i)+0.5))
}
hist.BinEdges[binNum] = hist.highLim
return hist, hist.AddArray(xs)
}示例#27
文件：
value.go
项目：
Codzart/go-ethereum
func sameValue(x Value, y Value) bool {
if x.kind != y.kind {
return false
}
result := false
switch x.kind {
case valueUndefined, valueNull:
result = true
case valueNumber:
x := x.float64()
y := y.float64()
if math.IsNaN(x) && math.IsNaN(y) {
result = true
} else {
result = x == y
if result && x == 0 {
// Since +0 != -0
result = math.Signbit(x) == math.Signbit(y)
}
}
case valueString:
result = x.string() == y.string()
case valueBoolean:
result = x.bool() == y.bool()
case valueObject:
result = x._object() == y._object()
default:
panic(hereBeDragons())
}
return result
}示例#28
文件：
sum_test.go
项目：
mingzhi/gomath
func TestSumSpecialValues(t *testing.T) {
sum := NewSum()
if !assert.EqualFloat64(0.0, sum.GetResult(), 1e-10, 1) {
t.Errorf("Sum: result: %f, but expect: %f\n", sum.GetResult(), 0.0)
}
sum.Increment(1.0)
if !assert.EqualFloat64(1.0, sum.GetResult(), 1e-10, 1) {
t.Errorf("Sum: result: %f, but expect: %f\n", sum.GetResult(), 1.0)
}
sum.Increment(math.Inf(0))
if !assert.EqualFloat64(math.Inf(0), sum.GetResult(), 1e-10, 1) {
t.Errorf("Sum: result: %f, but expect: %f\n", sum.GetResult(), math.Inf(0))
}
sum.Increment(math.Inf(-1))
if !math.IsNaN(sum.GetResult()) {
t.Error("Sum: result should be NaN")
}
sum.Increment(1.0)
if !math.IsNaN(sum.GetResult()) {
t.Error("Sum: result should be NaN")
}
}示例#29
文件：
number.go
项目：
jmptrader/query
func (this floatValue) Collate(other Value) int {
other = other.unwrap()
switch other := other.(type) {
case floatValue:
if math.IsNaN(float64(other)) {
if math.IsNaN(float64(this)) {
return 0
} else {
return 1
}
}
result := float64(this - other)
switch {
case result < 0.0:
return -1
case result > 0.0:
return 1
}
return 0
default:
return int(NUMBER - other.Type())
}
}示例#30
文件：
comparisons.go
项目：
connectordb/duck
//Cmp performs a comparison between the two values, and returns the result
//of the comparison (LessThan, GreaterThan, Equals, CantCompare), which are defined as ints
func Cmp(arg1 interface{}, arg2 interface{}) int {
eq, ok := Equal(arg1, arg2)
if !ok {
return CantCompare
}
if eq {
return Equals
}
lt, _ := Lt(arg1, arg2)
if lt {
return LessThan
}
f1, ok := Float(arg1)
if !ok {
return CantCompare
}
f2, ok := Float(arg2)
if !ok {
return CantCompare
}
if math.IsNaN(f1) || math.IsNaN(f2) {
return CantCompare
}
return GreaterThan
}