func ExampleKeyBy() {
type Order struct {
ID int
Shipping string
Total int
}
var keyOrdersById func([]Order, func(Order) int) map[int]Order
if err := funcs.MakeKeyBy(&keyOrdersById); err != nil {
log.Fatal(err)
}
orders := []Order{{1, "USA", 100}, {20, "Japan", 1000}, {60, "Spain", 250}}
ordersById := keyOrdersById(orders, func(order Order) int {
return order.ID
})
fmt.Println(ordersById[1])
fmt.Println(ordersById[60])
// Output:
// {1 USA 100}
// {60 Spain 250}
}
result := "metadata : {"
result += "collectionName: '" + meta.targetDocument + "', "
result += "idField: '" + meta.idField + "' "
result += "fields :[\n"
for i, field := range meta.fields {
if i > 0 {
result += ",\n "
}
result += "{" + field.String() + "}"
}
return result + "\n]}\n"
}
var (
keyValuesByObjectID func(collection []reflect.Value, selector func(reflect.Value) bson.ObjectId) map[bson.ObjectId]reflect.Value
_ = funcs.Must(funcs.MakeKeyBy(&keyValuesByObjectID))
getKeys func(map[bson.ObjectId]reflect.Value) []bson.ObjectId
_ = funcs.Must(funcs.MakeGetKeys(&getKeys))
flatten func([][]interface{}) []interface{}
_ = funcs.Must(funcs.MakeFlatten(&flatten))
mapResultsToInterfaces func([]map[string]interface{}, func(map[string]interface{}) []interface{}) [][]interface{}
_ = funcs.Must(funcs.MakeMap(&mapResultsToInterfaces))
keyResultsBySourceID func(results []map[string]interface{}, mapper func(result map[string]interface{}) (id bson.ObjectId)) map[bson.ObjectId]map[string]interface{}
_ = funcs.Must(funcs.MakeKeyBy(&keyResultsBySourceID))
mapResultsToRelatedObjectIds func(results []map[string]interface{}, mapper func(result map[string]interface{}) bson.ObjectId) []bson.ObjectId
_ = funcs.Must(funcs.MakeMap(&mapResultsToRelatedObjectIds))
