chanonroy

const nestedData = [1, 2, [3, [4, 5]]]

const flatten = (arr) => {
  return arr.reduce((acc, cur) => {
    return acc.concat(Array.isArray(cur) ? flatten(cur) : cur)
  }, [])
}

const result = flatten(nestedData)

chanonroy

const categories = [
  { id: 1, label: "Action" },
  { id: 2, label: "Romance" },
  { id: 3, label: "Comedy" },
  { id: 4, label: "Horror" },
]

const result = categories.reduce((acc, cur) => {
  const { id, label } = cur
  acc[id] = label

chanonroy

const data = [
  { name: "Chanon", age: 28, voted: true },
  { name: "Tim", age: 20, voted: true },
  { name: "Sarah", age: 27, voted: true },
  { name: "Jeff", age: 17, voted: false },
]

const result = data.reduce((acc, cur) => {
  return {
    maxAge: Math.max(acc.maxAge, cur.age),

chanonroy

const data = [
  { name: "Chanon", age: 28, voted: true },
  { name: "Tim", age: 20, voted: true },
  { name: "Sarah", age: 27, voted: true },
  { name: "Jeff", age: 17, voted: false },
]

const result = data.reduce((acc, cur) => {
  return {
    totalVotes: acc.totalVotes + (cur.voted ? 1 : 0)

chanonroy

const data = [1, 2, 3]

const result = data.reduce((acc, cur) => {
  return acc + cur
}, 0)

// result: 6

chanonroy

import React, { Component } from "react"
import {
  ScrollView,
  Animated,
  SafeAreaView,
  ImageBackground,
  Dimensions,
} from "react-native"

const OFFSET = 40

chanonroy

import React, { Component } from "react"
import {
  View,
  ScrollView,
  SafeAreaView,
  ImageBackground,
  Dimensions,
} from "react-native"

const ITEM_WIDTH = Dimensions.get("window").width

chanonroy

import { debounce } from 'lodash'
import { track } from './analytics-service' 

export default function App() {
  const [value, setValue] = useState("")

  const trackAnalytics = (val) => {
    if (val) track(val)
  }
  

chanonroy

import { debounce } from 'lodash'
import { track } from './analytics-service' 

export default function App() {
  const [value, setValue] = useState("")

  const trackAnalytics = (val) => {
    if (val) track(val)
  }
  

chanonroy

export const waitFor = async (cb: any) => {
  let c = 0

  async function f() {
    try {
      await cb()
    } catch (error) {
      if (c < 9) {
        c += 1
        setTimeout(f, 500)