你知道这五种好用的编程模式吗？

function transformData(rawData) {  // check if no data  if (!rawData) {    return [];  }
  // check for specific case  if (rawData.length == 1) {    return [];  }
  // actual function code goes here  return rawData.map((item) => item);}

// Switchlet createType = null;switch (contentType) {  case "post":    createType = () => console.log("creating a post...");    break;  case "video":    createType = () => console.log("creating a video...");    break;  default:    createType = () => console.log('unrecognized content type');}
createType();
// Object literalconst contentTypes = {  post: () => console.log("creating a post..."),  video: () => console.log("creatinga  video..."),  default: () => console.log('unrecognized content type')};
const createType = contentTypes[contentType] || contentTypes['default'];createType();

const exampleValues = [2, 15, 8, 23, 1, 32];const [truthyValues, falseyValues] = exampleValues.reduce((arrays, exampleValue) => {  if (exampleValue > 10) {    arrays[0].push(exampleValue);    return arrays;  }
  arrays[1].push(exampleValue);  return arrays;}, [[], []]);

// badconst foo = y && z;
// goodconst isPostEnabled = isPost && postDateValid;

let result = null;if (conditionA) {  if (conditionB) {    result = "A & B";  } else {    result = "A";  }} else {  result = "Not A";}
const result = !conditionA  ? "Not A"  : conditionB  ? "A & B"  : "A";