KeithGillette

import ApolloClient, { ApolloClientOptions, ApolloQueryResult, MutationOptions, MutationUpdaterFn, ObservableQuery, OperationVariables, WatchQueryOptions } from 'apollo-client';
import { DocumentNode } from 'graphql';
import { FetchResult } from 'apollo-link';
import { DataProxy } from 'apollo-cache';
import { QueryRef } from 'apollo-angular';
import { R } from 'apollo-angular/types';

interface IMutationUpdateEvent<T = any> {
	mutation: DocumentNode;
	dataProxy: DataProxy;

KeithGillette

export interface IClassConstructor<T> {
	new (...args: any[]): T;
}

/** generic TypeScript Type Guard
 *  https://www.typescriptlang.org/docs/handbook/advanced-types.html#user-defined-type-guards
 */
export function isDuckTypeEquivalentToClass<T>(objectToTest: any, classToTest: IClassConstructor<T>): objectToTest is T {
	if (objectToTest instanceof classToTest) {
		return true;

KeithGillette

import { Injectable } from '@angular/core';
import { Observable, Subject } from 'rxjs/Rx';
import { filter, map } from 'rxjs/operators';

export interface IClassConstructor<T> {
	new (...args: any[]): T;
}

export interface IMessage {
	channel: Function;

KeithGillette

/**
 * @description Configures an CreateOverrideableArray generator function returning arrays with provided array methods overriden or added
 * @param       {{ 'functionName': { 'functionToApply': () => any, 'overrideNativeMethod'?: boolean } }} configuration - configuration object
 * @returns     {function: any[]} CreateOverriddenArray - returns an array of provided parameters with array methods configured
 */
export function ConfigureOverridableArrayFactory(configuration: {}) {
    const callingContext = this;
    const protoIsSupported = { __proto__: [] } instanceof Array; // Test browser for __proto__ property support
    // save all standard array methods in a list
    const anArray: any[] = new Array();