javascript - typescript 或 JavaScript 将对象的嵌套数组转换为键、值对

Question

下面的数组是输入和期望相应的 O/P。 如何使用 Typescript 将其实现为键值对

let arr = [
  {id: "1",
   questions: [
     {question: "HTML Tutorial" },
     {question: "HTML References" }
   ],
    answer : "Hypertext Markup Language is the standard markup language for documents designed to be displayed in a web browser. It can be assisted by technologies such as Cascading Style Sheets and scripting languages such as JavaScript and VBScript."
  },
  {id: "2",
   questions: [
     {question: "HTML Element Reference" },
     {question: "HTML Reference - Browser Support" }
   ],
   answer : "An HTML element is a type of HTML document component, one of several types of HTML nodes. HTML document is composed of a tree of simple HTML nodes, such as text nodes, and HTML elements, which add semantics and formatting to parts of document. Each element can have HTML attributes specified."
  }
];

// Expected Output using Typescript

Array [{ Key: "1", value: "HTML Tutorial, HTML References: Hypertext Markup Language is the standard markup language for documents designed to be displayed in a web browser. It can be assisted by technologies such as Cascading Style Sheets and scripting languages such as JavaScript and VBScript." },
{ Key: "2", value: "HTML Element Reference,HTML Reference - Browser Support : An HTML element is a type of HTML document component, one of several types of HTML nodes. HTML document is composed of a tree of simple HTML nodes, such as text nodes, and HTML elements, which add semantics and formatting to parts of document. Each element can have HTML attributes specified." }]

Answer 1

使用map()

let arr = [{id:"1",questions:[{question:"HTML Tutorial"},{question:"HTML References"}],answer:"Hypertext Markup Language is the standard markup language for documents designed to be displayed in a web browser. It can be assisted by technologies such as Cascading Style Sheets and scripting languages such as JavaScript and VBScript."},{id:"2",questions:[{question:"HTML Element Reference"},{question:"HTML Reference - Browser Support"}],answer:"An HTML element is a type of HTML document component, one of several types of HTML nodes. HTML document is composed of a tree of simple HTML nodes, such as text nodes, and HTML elements, which add semantics and formatting to parts of document. Each element can have HTML attributes specified."}];

let res = arr.map(i => {
  let q = i.questions.map(q => q.question).join(', ')
  return { Key: i.id, value: q + ' : ' + i.answer }
});

console.log(res)