- add IsInteger

big_output.go

@@ -2,6 +2,7 @@ package godecimal
 
 import (
 	"fmt"
+	"math"
 	"math/big"
 	"strings"
 )
@@ -36,8 +37,8 @@ func (d Decimal) Float64Point(p int) float64 {
 func (d Decimal) Float64PointAdaptive(maxP int) float64 {
 	f, _ := d.floatValue.Float64()
 	if maxP > 0 {
-		pointLength := d.pointLength(f)
-		if pointLength > maxP {
+		pL := d.pointLength(f)
+		if pL > maxP {
 			rat, _ := new(big.Rat).SetString(d.floatValue.Text('f', maxP))
 			f2, _ := rat.Float64()
 			return f2
@@ -56,3 +57,12 @@ func (Decimal) pointLength(a any) int {
 	}
 	return len(tmp[1])
 }
+
+// IsInteger 是否为整数
+func (d Decimal) IsInteger(d2 float64) bool {
+	f3 := NewFloat(d.Float64()).QuoFloat(NewFloat(d2).Float64()).Float64()
+	if f3 == math.Trunc(f3) {
+		return true
+	}
+	return false
+}

go.mod

@@ -1,3 +1,5 @@
 module go.dtapp.net/godecimal
 
 go 1.19
+
+require github.com/shopspring/decimal v1.3.1

go.sum

@@ -0,0 +1,2 @@
+github.com/shopspring/decimal v1.3.1 h1:2Usl1nmF/WZucqkFZhnfFYxxxu8LG21F6nPQBE5gKV8=
+github.com/shopspring/decimal v1.3.1/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=

version.go

@@ -1,3 +1,3 @@
 package godecimal
 
-const Version = "1.0.7"
+const Version = "1.0.8"