Huangzj
31 lines
712 B
Go
31 lines
712 B
Go
package linq
|
|
|
|
// Reverse inverts the order of the elements in a collection.
|
|
//
|
|
// Unlike OrderBy, this sorting method does not consider the actual values
|
|
// themselves in determining the order. Rather, it just returns the elements in
|
|
// the reverse order from which they are produced by the underlying source.
|
|
func (q Query) Reverse() Query {
|
|
return Query{
|
|
Iterate: func() Iterator {
|
|
next := q.Iterate()
|
|
|
|
items := []interface{}{}
|
|
for item, ok := next(); ok; item, ok = next() {
|
|
items = append(items, item)
|
|
}
|
|
|
|
index := len(items) - 1
|
|
return func() (item interface{}, ok bool) {
|
|
if index < 0 {
|
|
return
|
|
}
|
|
|
|
item, ok = items[index], true
|
|
index--
|
|
return
|
|
}
|
|
},
|
|
}
|
|
}
|