JS 将 obj 转换为 str

小编典典

JS 将 obj 转换为 str

javascript

我正在创建代码以将字符串转换为字典和数组，并将数组和字典转换为字符串。

字符串到数组有效，字符串到 Obj（字典）有效，数组到文本有效，但 obj 到字符串（文本）无效。我被卡住了，我不知道如何解决它。我测试了代码，但结果并不好。

function strToArray(string) {
  let array = [];
  for (var element of string) {
    array.push(element);
  }
  return array;
};

function strToObj(string) {
  let dict = {};
  for (let i = 0; i < string.length; i++) {
    let letter = string[i];
    if (dict[letter]) {
      dict[letter].push(i);
    } else {
      dict[letter] = [i];
    }
  }
  return dict;
};

function arrayToString(array) {
  let text = "";
  for (var element of array) {
    text = text + element;
  }
  return text;
};

function objToString(obj) {
  let text = "";
  //for(i = 0; i < obj.length; i++){
  //text = text + arrayToString(obj[i]);
  //}
  for (var element in obj) {
    let value = obj[element];

  }
  return text;
};


const ArrayHello = strToArray('hello');
const ObjHello = strToObj('hello');
const HelloArray = arrayToString(ArrayHello);
const HelloObj = objToString(ObjHello);

console.log(ArrayHello);
console.log(ObjHello);
console.log(HelloArray);
console.log(HelloObj);

阅读 106

2022-07-26

共1个答案

小编典典

您可以使用数组来创建字符串，并且可以重用arrayToString()方法，并且可以很容易地得到答案，如下所示：

function strToArray(string) {
  let array = [];
  for (var element of string) {
    array.push(element);
  }
  return array;
};

function strToObj(string) {
  let dict = {};
  for (let i = 0; i < string.length; i++) {
    let letter = string[i];
    if (dict[letter]) {
      dict[letter].push(i);
    } else {
      dict[letter] = [i];
    }
  }
  return dict;
};

function arrayToString(array) {
  let text = "";
  for (var element of array) {
    text = text + element;
  }
  return text;
};

function objToString(obj) {
  let text = [];

  for (let [key, index] of Object.entries(obj)) {
    for (let i of index) {
      text[i] = key;
    }
  }

  return arrayToString(text);
};


const ArrayHello = strToArray('hello');
const ObjHello = strToObj('hello');
const HelloArray = arrayToString(ArrayHello);
const HelloObj = objToString(ObjHello);

console.log(ArrayHello);
console.log(ObjHello);
console.log(HelloArray);
console.log(HelloObj);

更新：

您也可以使用方法轻松 Array.prototype.join实现功能[MDN LINK]arrayToString

const array = ['h', 'e', 'l', 'l', 'o'];

const arrayToString = (arr, delimiter = '') => arr.join(delimiter);

console.log(arrayToString(array));

2022-07-26