摘要： 1 反例: 2 function createMicrobrewery(name) { 3 var breweryName; 4 if (name) { 5 breweryName = name; 6 } else { 7 breweryName = 'Hipster Brew Co.'; 8 } 9 } 10 正例: 11 12 functi... 阅读全文