Documentation
¶
Overview ¶
Package suffixarray implements substring search in logarithmic time using an in-memory suffix array.
Example use:
// create index for some data index := suffixarray.New(data) // lookup byte slice s offsets1 := index.Lookup(s, -1) // the list of all indices where s occurs in data offsets2 := index.Lookup(s, 3) // the list of at most 3 indices where s occurs in data
Index ¶
Examples ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Index ¶
type Index struct {
// contains filtered or unexported fields
}
Index implements a suffix array for fast substring search.
func (*Index) Bytes ¶
Bytes returns the data over which the index was created. It must not be modified.
func (*Index) FindAllIndex ¶
FindAllIndex returns a sorted list of non-overlapping matches of the regular expression r, where a match is a pair of indices specifying the matched slice of x.Bytes(). If n < 0, all matches are returned in successive order. Otherwise, at most n matches are returned and they may not be successive. The result is nil if there are no matches, or if n == 0.
func (*Index) Lookup ¶
Lookup returns an unsorted list of at most n indices where the byte string s occurs in the indexed data. If n < 0, all occurrences are returned. The result is nil if s is empty, s is not found, or n == 0. Lookup time is O(log(N)*len(s) + len(result)) where N is the size of the indexed data.
Example ¶
package main
import (
"fmt"
"index/suffixarray"
)
func main() {
index := suffixarray.New([]byte("banana"))
offsets := index.Lookup([]byte("ana"), -1)
for _, off := range offsets {
fmt.Println(off)
}
}
Output: 1 3
Source Files