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package funk
import (
"reflect"
)
// Subset returns true if collection x is a subset of y.
func Subset(x interface{}, y interface{}) bool {
if !IsCollection(x) {
panic("First parameter must be a collection")
}
if !IsCollection(y) {
panic("Second parameter must be a collection")
}
xValue := reflect.ValueOf(x)
xType := xValue.Type()
yValue := reflect.ValueOf(y)
yType := yValue.Type()
if NotEqual(xType, yType) {
panic("Parameters must have the same type")
}
if xValue.Len() == 0 {
return true
}
if yValue.Len() == 0 || yValue.Len() < xValue.Len() {
return false
}
for i := 0; i < xValue.Len(); i++ {
if !Contains(yValue.Interface(), xValue.Index(i).Interface()) {
return false
}
}
return true
}
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