JavaScript中移除父级数组，返回指定格式数组的实现方法

这事儿超简单，给你几个实用的解决方案，按需选就行：

你的父级数组里只有一个元素，直接用[0]就能取出里面的目标对象，这是最直观的写法：

const originalData = [{"klasses":[{"flightCode":"SHA735","departure":"03:50 PM","arrival":"04:15 PM","fareCode":"T Class","fare":"4,000","baggage":"0"},{"flightCode":"SHA735","departure":"03:50 PM","arrival":"04:15 PM","fareCode":"S Class","fare":"5,000","baggage":"0"},{"flightCode":"SHA735","departure":"03:50 PM","arrival":"04:15 PM","fareCode":"E Class","fare":"5,300","baggage":"0"}]}];
const result = originalData[0];
console.log(result);

执行后result就是你要的、去掉父级数组后的对象。

如果是现代JavaScript开发场景，用解构语法会更简洁清爽，直接提取数组的第一个元素：

const originalData = [{"klasses":[{"flightCode":"SHA735","departure":"03:50 PM","arrival":"04:15 PM","fareCode":"T Class","fare":"4,000","baggage":"0"},{"flightCode":"SHA735","departure":"03:50 PM","arrival":"04:15 PM","fareCode":"S Class","fare":"5,000","baggage":"0"},{"flightCode":"SHA735","departure":"03:50 PM","arrival":"04:15 PM","fareCode":"E Class","fare":"5,300","baggage":"0"}]}];
const [result] = originalData;
console.log(result);

这种写法可读性强，也符合当前的代码风格趋势。

shift()方法会移除数组的第一个元素并返回它，但要注意这个方法会修改原数组，如果不需要保留原数组的话可以用：

const originalData = [{"klasses":[{"flightCode":"SHA735","departure":"03:50 PM","arrival":"04:15 PM","fareCode":"T Class","fare":"4,000","baggage":"0"},{"flightCode":"SHA735","departure":"03:50 PM","arrival":"04:15 PM","fareCode":"S Class","fare":"5,000","baggage":"0"},{"flightCode":"SHA735","departure":"03:50 PM","arrival":"04:15 PM","fareCode":"E Class","fare":"5,300","baggage":"0"}]}];
const result = originalData.shift();
// 此时originalData会变成空数组
console.log(result);

如果需要保留原数组，优先选择前两种方法。

内容的提问来源于stack exchange，提问作者user9663647