inc

inc

inc is a (headless) incremental text search library.

install

go get -u github.com/tbistr/inc

Usage

For more information, see godoc.

// initialize with the initial query and the target strings
// Strs2Cands converts []string to []inc.Candidate
target := []string{"foobar", "hogehuga", "bazbar"}
e := inc.New("initial query", inc.Strs2Cands(target))

e.DelQuery()             // delete all runes from the query
e.AddQuery('o')          // add 'o' to the query
fmt.Println(e.Matched()) // ["foobar", "hogehuga"]
e.RmQuery()              // remove the last rune from the query
fmt.Println(e.Matched())

a := struct{ Name string }{Name: "some struct A"}
b := struct{ Name string }{Name: "some struct B"}

// you can get some matched object or pointer
e = inc.New("", []inc.Candidate{
    {Ptr: &a, Text: []rune("abc")},
    {Ptr: &b, Text: []rune("def")},
})

// some query operations

for _, c := range e.Matched() {
    // get matched pointer as *struct{ Name string }
    fmt.Println(c.Ptr.(*struct{ Name string }).Name)
}

What is incremental search?

For the following text,

[]string{"foobar", "hogehuga", "foobaz"}

query "ob" matches "foobar" and "foobaz".
Then add 'r' to the query, it only matches "foobar".
Remove 'r' and add 'z', it matches "foobaz" again.

Like this, incremental search checks

• if the runes in the query are included in the text;
• if the order of the included runes is the same as the query.

But doesn't care about substrings between the runes.

This is the explanation of the default algorithm of inc. You can change the algorithm by implementing inc.Algorithm and passing it to inc.NewWithAlgo.