tidb float64_set 代码
文件路径：/util/set/float64_set.go
/ Copyright 2018 PingCAP, Inc.
/
/ Licensed under the Apache License, Version 2.0 (the "License");
/ you may not use this file except in compliance with the License.
/ You may obtain a copy of the License at
/
/ http://www.apache.org/licenses/LICENSE-2.0
/
/ Unless required by applicable law or agreed to in writing, software
/ distributed under the License is distributed on an "AS IS" BASIS,
/ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/ See the License for the specific language governing permissions and
/ limitations under the License.
package set
/ Float64Set is a float64 set.
type Float64Set map[float64]struct{}
/ NewFloat64Set builds a float64 set.
func NewFloat64Set(fs ...float64) Float64Set {
x := make(Float64Set, len(fs))
for _, f := range fs {
x.Insert(f)
}
return x
}
/ Exist checks whether `val` exists in `s`.
func (s Float64Set) Exist(val float64) bool {
_, ok := s[val]
return ok
}
/ Insert inserts `val` into `s`.
func (s Float64Set) Insert(val float64) {
s[val] = struct{}{}
}
/ Count returns the number in Set s.
func (s Float64Set) Count() int {
return len(s)
}