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a = {b: 1, c:{ d:3 }}
z = Object.assign({}, a)
z.c.d = 4
console.log(a.c.d) // 4

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javascript:(function()%7Bvar%20table%20%3D%20document.getElementsByTagName('table')%5B2%5D%3Bvar%20rows%20%3D%20table.getElementsByTagName('tr')%3Bvar%20parseTime%20%3D%20function(rawDateTime%2C%20offset)%7Bvar%20tomorrow%20%3D%20new%20Date()%3Btomorrow.setDate(tomorrow.getDate()%20%2B%20offset)%3Bvar%20splitDateTime%20%3D%20rawDateTime.split('%5Cn%20%20')%3Bvar%20isPM%20%3D%20splitDateTime%5B1%5D.indexOf('pm')%20%3E%20-1%3Bvar%20date%20%3D%20splitDateTime%5B0%5D.split('%2F')%3Bvar%20month%20%3D%20parseInt(date%5B0%5D)%20-%201%3Bvar%20day%20%3D%20parseInt(date%5B1%5D)%3Bvar%20year%20%3D%20parseInt(date%5B2%5D)%3Bvar%20time%20%3D%20splitDateTime%5B1%5D.split('.')%3Bvar%20hour%20%3D%20parseInt(time%5B0%5D)%3Bif(isPM%20%26%26%20hour%20%3C%2012)%7Bhour%20%2B%3D%2012%3B%7Dvar%20min%20%3D%20parseInt(time%5B1%5D)%3Bif(tomorrow.getMonth()%20%3D%3D%3D%20month%20%26%26%20tomorrow.getDate()%20%3D%3D%3D%20day)%20%7Breturn%20new%20Date(year%2C%20month%2C%20day%2C%20hour%2C%20min)%3B%7D%7D%3Bvar%20s%20%3D%20%7Bcontainer%3A

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Connection to localhost port 8081 [tcp/sunproxyadmin] succeeded!

Port 8081 already in use, packager is either not running or not running correctly
Command /bin/sh failed with exit code 2

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BEFORE THREAD DOWNLOAD REFACTOR
                | ---------------------------------------------------------------------------------------------------- 8765 total
configure-store | ------------------ 1598ms
get-stored-stat | ----------------- 1567ms
create-store... |                   7ms
run-saga-middle |                   23ms
bootstrap...... |                    53ms
download-device |                   ------- 688ms
get-devices.... |                   ------- 616ms
get-store...... |                   ---- 396ms

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// In test file

const spy = effectSpy(generator)
  .next('init')
  .next('getToken', token) // name and pass in yield values
  .next('getUpdatedFooBars', fooBars)
  .next('putFooBars');

// in beforeEach
mySpyRun = spy.run({

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// Having some sort of feature flags allows us to
// - write centralized logic around when to show features
// - develop features in smaller pieces behind feature flags
// - turn on/off features at will

// In a view, effect, whereever 
import features from '../features'

if (features('showFooBar')) {
  // display FooBar

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Testing with Effect Runner

A Redux-Saga test runner for Mocha

Goals

• Switching the order of instructions should be easy
• Associate instructions with their results
• Changing instruction results should be easy

Guide

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// It gets hard to test combined selectors after a while.
// The dependency chains run deep.  To get around this we
// can test the callback function seperately from the rest
// of the selector, but that leaves a testing gap.

// In order to test that createSelector gets called with the
// right stuff, we could do something like this

// WARNING UNTESTED CODE

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0 == null; // false
'' == null; // false
undefined == null; // true

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// my-reducer.js
function myReducer(plugins, state, action) {
  // ...
}

// reducers.js
import { myReducer } from './my-reducer';

export const reducers = {
  myReducers,