47 lines
1.7 KiB
Go
47 lines
1.7 KiB
Go
|
/*
|
||
|
|
* Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
|
||
|
|
* Author: Alex Yatskov <alex@foosoft.net>
|
||
|
|
*
|
||
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy of
|
||
|
|
* this software and associated documentation files (the "Software"), to deal in
|
||
|
|
* the Software without restriction, including without limitation the rights to
|
||
|
|
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
||
|
|
* the Software, and to permit persons to whom the Software is furnished to do so,
|
||
|
|
* subject to the following conditions:
|
||
|
|
*
|
||
|
|
* The above copyright notice and this permission notice shall be included in all
|
||
|
|
* copies or substantial portions of the Software.
|
||
|
|
*
|
||
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
|
||
|
|
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
|
||
|
|
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
||
|
|
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
||
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
type Features map[string]float32
|
||
|
|
type Record struct {
|
||
|
|
features Features
|
||
|
|
}
|
||
|
|
|
||
|
|
func innerProduct(features1 Features, features2 Features) float32 {
|
||
|
|
var result float32
|
||
|
|
for key, value1 := range features1 {
|
||
|
|
value2, _ := features2[key]
|
||
|
|
result += value1 * value2
|
||
|
|
}
|
||
|
|
|
||
|
|
return result
|
||
|
|
}
|
||
|
|
|
||
|
|
func walkMatches(records []Record, features Features, minScore float32, callback func(Record, float32)) {
|
||
|
|
for _, record := range records {
|
||
|
|
if score := innerProduct(features, record.features); score >= minScore {
|
||
|
|
callback(record, score)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|