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FunctionalVector.ts
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FunctionalVector.ts
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/**
* @public
* @deprecated use a simple Arrays
*/
export abstract class FunctionalVector<T = unknown> {
abstract get length(): number;
abstract get(index: number): T;
// Implement "iterator protocol"
*iterator() {
for (let i = 0; i < this.length; i++) {
yield this.get(i);
}
}
set(index: number, value: T): void {
throw 'unsupported operation';
}
add(value: T): void {
throw 'unsupported operation';
}
push(...vals: T[]): number {
for (const v of vals) {
this.add(v);
}
return this.length;
}
// Implement "iterable protocol"
[Symbol.iterator]() {
return this.iterator();
}
forEach(iterator: (row: T, index: number, array: T[]) => void): void {
return vectorator(this).forEach(iterator);
}
map<V>(transform: (item: T, index: number, array: T[]) => V): V[] {
return vectorator(this).map(transform);
}
filter(predicate: (item: T, index: number, array: T[]) => boolean): T[] {
return vectorator(this).filter(predicate);
}
at(index: number): T | undefined {
return this.get(index);
}
toArray(): T[] {
const arr = new Array<T>(this.length);
for (let i = 0; i < this.length; i++) {
arr[i] = this.get(i);
}
return arr;
}
join(separator?: string | undefined): string {
return this.toArray().join(separator);
}
toJSON(): any {
return this.toArray();
}
//--------------------------
// Method not implemented
//--------------------------
[n: number]: T;
pop(): T | undefined {
throw new Error('Method not implemented.');
}
concat(...items: Array<ConcatArray<T>>): T[];
concat(...items: Array<T | ConcatArray<T>>): T[] {
throw new Error('Method not implemented.');
}
reverse(): T[] {
throw new Error('Method not implemented.');
}
shift(): T | undefined {
throw new Error('Method not implemented.');
}
sort(compareFn?: ((a: T, b: T) => number) | undefined): this {
throw new Error('Method not implemented.');
}
splice(start: number, deleteCount?: number | undefined): T[];
splice(start: number, deleteCount: number, ...items: T[]): T[] {
throw new Error('Method not implemented.');
}
unshift(...items: T[]): number {
throw new Error('Method not implemented.');
}
fill(value: T, start?: number | undefined, end?: number | undefined): this {
throw new Error('Method not implemented.');
}
copyWithin(target: number, start: number, end?: number | undefined): this {
throw new Error('Method not implemented.');
}
// Object not implemented
[Symbol.unscopables] = {};
//--------------------------------------------------------------------------------
// Delegated Array function -- these will not be efficient :grimmice:
//--------------------------------------------------------------------------------
slice(start?: number | undefined, end?: number | undefined): T[] {
return this.toArray().slice(start, end);
}
indexOf(searchElement: T, fromIndex?: number | undefined): number {
return this.toArray().indexOf(searchElement, fromIndex);
}
lastIndexOf(searchElement: T, fromIndex?: number | undefined): number {
return this.toArray().lastIndexOf(searchElement, fromIndex);
}
every<S extends T>(predicate: (value: T, index: number, array: T[]) => value is S, thisArg?: any): this is S[];
every(predicate: (value: T, index: number, array: T[]) => unknown, thisArg?: any): boolean;
every(predicate: any, thisArg?: unknown): boolean {
return this.toArray().every(predicate, thisArg);
}
some(predicate: (value: T, index: number, array: T[]) => unknown, thisArg?: any): boolean {
return this.toArray().some(predicate, thisArg);
}
reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T): T;
reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue: T): T;
reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
reduce(callbackfn: unknown, initialValue?: unknown): T {
throw new Error('Method not implemented.');
}
reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T): T;
reduceRight(
callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T,
initialValue: T
): T;
reduceRight<U>(
callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U,
initialValue: U
): U;
reduceRight(callbackfn: unknown, initialValue?: unknown): T {
throw new Error('Method not implemented.');
}
find<S extends T>(
predicate: (this: void, value: T, index: number, obj: T[]) => value is S,
thisArg?: any
): S | undefined;
find(predicate: (value: T, index: number, obj: T[]) => unknown, thisArg?: any): T | undefined {
return this.toArray().find(predicate, thisArg);
}
findIndex(predicate: (value: T, index: number, obj: T[]) => unknown, thisArg?: any): number {
return this.toArray().findIndex(predicate, thisArg);
}
entries(): IterableIterator<[number, T]> {
return this.toArray().entries();
}
keys(): IterableIterator<number> {
return this.toArray().keys();
}
values(): IterableIterator<T> {
return this.toArray().values();
}
includes(searchElement: T, fromIndex?: number | undefined): boolean {
return this.toArray().includes(searchElement, fromIndex);
}
flatMap<U, This = undefined>(
callback: (this: This, value: T, index: number, array: T[]) => U | readonly U[],
thisArg?: This | undefined
): U[] {
return this.toArray().flatMap(callback, thisArg);
}
flat<A, D extends number = 1>(this: A, depth?: D | undefined): Array<FlatArray<A, D>> {
throw new Error('Method not implemented.');
}
}
const emptyarray: any[] = [];
/**
* Use functional programming with your vector
*
* @deprecated use a simple Arrays
*/
export function vectorator<T>(vector: FunctionalVector<T>) {
return {
*[Symbol.iterator]() {
for (let i = 0; i < vector.length; i++) {
yield vector.get(i);
}
},
forEach(iterator: (row: T, index: number, array: T[]) => void): void {
for (let i = 0; i < vector.length; i++) {
iterator(vector.get(i), i, emptyarray);
}
},
map<V>(transform: (item: T, index: number, array: T[]) => V): V[] {
const result: V[] = [];
for (let i = 0; i < vector.length; i++) {
result.push(transform(vector.get(i), i, emptyarray));
}
return result;
},
/** Add a predicate where you return true if it should *keep* the value */
filter(predicate: (item: T, index: number, array: T[]) => boolean): T[] {
const result: T[] = [];
let count = 0;
for (const val of this) {
if (predicate(val, count++, emptyarray)) {
result.push(val);
}
}
return result;
},
};
}