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number.go
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number.go
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package the
import (
"qlova.org/seed/client"
"qlova.org/seed/use/js"
)
//NumberExpression is an expression containing a number.
type NumberExpression struct {
client.Float
components []client.Value
}
//Components implements clientside.Compound
func (a NumberExpression) Components() []client.Value {
return a.components
}
//IsLessThan returns a < b
func (a NumberExpression) IsLessThan(b client.Float) BoolExpression {
return Bool(js.NewValue("(%v < %v)", a, b), a, b)
}
//IsMoreThan returns a > b
func (a NumberExpression) IsMoreThan(b client.Float) BoolExpression {
return Bool(js.NewValue("(%v > %v)", a, b), a, b)
}
//Number returns the NumberType of n.
func Number(n client.Float, components ...client.Value) NumberExpression {
return NumberExpression{n, client.FlattenComponents(append(components, n)...)}
}
//SumOf returns the sum of (a + b + others...)
func SumOf(a, b client.Float, others ...client.Float) NumberExpression {
var expression string = "(%v + %v"
var values = []client.Value{a, b}
for _, n := range others {
expression += " + %v"
values = append(values, n)
}
expression += ")"
return Number(js.Number{Value: js.NewValue(expression, values...)}, values...)
}
//ProductOf returns the product of (a * b * others...)
func ProductOf(a, b client.Float, others ...client.Float) NumberExpression {
var expression string = "(%v * %v"
var values = []client.Value{a, b}
for _, n := range others {
expression += " * %v"
values = append(values, n)
}
expression += ")"
return Number(js.Number{Value: js.NewValue(expression, values...)}, values...)
}
//QuotientOf returns the quotient of (a / b / others...)
func QuotientOf(a, b client.Float, others ...client.Float) NumberExpression {
var expression string = "(%v / %v"
var values = []client.Value{a, b}
for _, n := range others {
expression += " / %v"
values = append(values, n)
}
expression += ")"
return Number(js.Number{Value: js.NewValue(expression, values...)}, values...)
}
//DifferenceOf returns the quotient of (a - b - others...)
func DifferenceOf(a, b client.Float, others ...client.Float) NumberExpression {
var expression string = "(%v - %v"
var values = []client.Value{a, b}
for _, n := range others {
expression += " - %v"
values = append(values, n)
}
expression += ")"
return Number(js.Number{Value: js.NewValue(expression, values...)}, values...)
}