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const recursive = (input: string[][]): string[][] => {
  if (input.length === 0) return [];
  if (input.length === 1) return input[0].map((i) => [i]);

  const arr = input[0];
  const perm = recursive(input.slice(1));
  const result = arr.map((a) => perm.map((p) => [a, ...p])).flat(1);
  return result;
};

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CT-741

The goal of this document is to help answer the following:

• How to calculate cost of using Vonage's video API?
• How do we access/store/maintain required data/information?

This document assumes we are being billed based on PPM (Participant-based Pricing Model).

What is PPM?

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export type RenameKey<I, K extends keyof I, N extends PropertyKey> = Omit<
  I,
  K
> &
  {
    [P in N]: I[K];
  };

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react-ps

react-ps is an a proposed React.js application's project structure. The document is currently under developement but will be available soon for inspiration.

Component

A component is a react component responsible for the visuals following the file/folder structure. Please note NewsLetter is the name of the component

.

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Storybook

Storybook streamlines the UI development, testing and documentation.

Setup Storybook

In order to setup storybook in an already existing react app, we will follow the following steps.

• Use the storybook CLI to install it in a single command. Run the following command inside your existing project's root directory:

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export type ModifyKey<I, K extends keyof I, V> = Omit<I, K> &
  { [K in keyof I]: V };

export type PickAndModifyKey<I, K extends keyof I, V> = ModifyKey<
  Pick<I, K>,
  K,
  V
>;

// key should be an interface/object

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import {
  FC,
  memo,
  useRef,
  useEffect,
  useReducer,
  useCallback,
  createContext,
} from "react";
import { SelectiveContextConsumer } from "selective-context-consumer";

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const SYMBOLS = {
  "I": 1,
  "V": 5,
  "X": 10,
  "L": 50,
  "C": 100,
  "D": 500,
  "M": 1000
}

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    u i o
    j k l
      +
ctrl/alt/shift

alt + i/k/j/l move up/down/left/right on character (+ shift to select/highlight)
alt + u/o move to start/end of the current line (+ shift to select/highlight)
alt + ctrl + j/l move start of current/left word | end of current/right word (+ shift to select/highlight)

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[
  
  /*
          u i o
          j k l
            +
      ctrl/alt/shift

      alt + i/k/j/l move up/down/left/right on character (+ shift to select/highlight)
      alt + u/o move to start/end of the current line (+ shift to select/highlight)