/**
* Copyright 2017-2020 Plexus Interop Deutsche Bank AG
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { join, distinct, toMap, concat } from './Arrays';
import { ExtendedMap } from './collections/ExtendedMap';
/**
* Provides few additional utility methods for array modification, immutable, all operations create new instance
*/
export class ExtendedArray<T> {
constructor(private readonly values: T[]) {}
public static of<T>(values: T[]): ExtendedArray<T> {
return new ExtendedArray<T>(values);
}
public joinWith<R, Y>(second: R[], joinFn: (x: T, y: R) => Y, Ipredicate: (x: T, y: R) => boolean = () => true): ExtendedArray<Y> {
return ExtendedArray.of<Y>(join(this.values, second, joinFn, predicate));
}
public distinct(Ikey: (x: T) => any = x => x ): ExtendedArray<T> {
return ExtendedArray.of(distinct(this.values, key));
}
public toArray(): T[] {
return this.values;
}
public flatMap<R>(f: (el: T) => R[]): ExtendedArray<R> {
return ExtendedArray.of(this.values.map(f).reduce<R[]>(concat, []));
}
public toMap<K, V>(keyFn: (v: T) => K, vFn: (v: T) => V): ExtendedMap<K, V> {
return toMap(this.values, keyFn, vFn);
}
} |