misha-erm

/*
 *
 * I want to key array by 'id'
 * 
 * FROM: [{id: 'a', name: 'A'}, {id: 'b', name: 'B'}]
 * TO: { a: {id: 'a', name: 'A'}, b: {id: 'b', name: 'B'} }
 * 
 */

const arr = [{id: 'a', name: 'A'}, {id: 'b', name: 'B'}] as const

misha-erm

/**
 * Problem: defining object with interfaces grant autocomplete but also widen all types (e.g. `true`  becomes `boolean`)
 * Defining object with `as const` infers all the narrowed types but looses autocomplete 

 * Solution: Create utility function with constrained generic type parameters. More info [here](https://kentcdodds.com/blog/how-to-write-a-constrained-identity-function-in-typescript)
 */

interface ISchema {
  id: string;
  description: string;

misha-erm

FROM node:14.15-alpine as base

WORKDIR /home/app
COPY package.json yarn.lock ./

# ---prepare dependencies---
FROM base as dependencies
# install production dependencies
RUN yarn install --production --frozen-lockfile
RUN mv node_modules prod_node_modules

misha-erm

import React from 'react';

export default function withPropsChecker(WrappedComponent) {
  return class PropsChecker extends React.Component {
    componentWillReceiveProps(nextProps) {
      Object.keys(nextProps)
        .filter(key => {
          return nextProps[key] !== this.props[key];
        })
        .map(key => {