beego的utils里面基本上实现了slice的全部操作：

• func InSlice(v string, sl []string) bool
• func InSliceIface(v interface{}, sl []interface{}) bool
• func SliceChunk(slice []interface{}, size int) (chunkslice [][]interface{})
• func SliceDiff(slice1, slice2 []interface{}) (diffslice []interface{})
• func SliceFilter(slice []interface{}, a filtertype) (ftslice []interface{})
• func SliceIntersect(slice1, slice2 []interface{}) (diffslice []interface{})
• func SliceMerge(slice1, slice2 []interface{}) (c []interface{})
• func SlicePad(slice []interface{}, size int, val interface{}) []interface{}
• func SliceRand(a []interface{}) (b interface{})
• func SliceRandList(min, max int) []int
• func SliceRange(start, end, step int64) (intslice []int64)
• func SliceReduce(slice []interface{}, a reducetype) (dslice []interface{})
• func SliceShuffle(slice []interface{}) []interface{}
• func SliceSum(intslice []int64) (sum int64)
• func SliceUnique(slice []interface{}) (uniqueslice []interface{})

https://github.com/astaxie/beego/blob/master/utils/slice.go