有条件地分割并合并文本

Question

我正在尝试有条件地拆分数组中的每个字符串。这是我的数组。

const categories = [
  "Department of Natural Science",
  "Department of public health and sanitation",
  "Department of culture and heritage of state"
];

再次拆分每个字符串，我想将其更改为数组。该数组包含字符串的几个块。例如。通过分割Department of culture and heritage of state字符串，我希望它分隔Department ofNaturalScience。在这里，我想创建每个不同的块如果块包含超过13个字符长度的单词。这就是Natural和Science分开的原因，因为如果我们将它们的长度总和变为14。

这是我尝试过的。

const categories = [
  "Department of Natural Science",
  "Department of public health and sanitation",
  "Department of culture and heritage of state"
];

const arrayOfAllString = []; // results at the end

categories.map(cur => {
  // looping the array
  const splitedItems = cur.trim().split(" "); // splitting the current string into words
  const arrayOfSingleString = []; //
  let str = "";
  splitedItems.map(item => {
    // looping the array of splitted words
    if (str.length + item.length > 13) {
      // trying to make a chunk
      arrayOfSingleString.push(str);
      str = ""; // clearing the str because it has been pushed to arrayOfSingleString
    } else {
      str = str.concat(item + " "); // concat the str with curent word
    }
  });
  arrayOfAllString.push(arrayOfSingleString);
});

console.log(arrayOfAllString);

我的预期结果将是这样的：

arrayOfAllString = [
  ["Department of", "Natural", "Science"],
  ["Department of", "public health", "and", "sanitation"],
  ["Department of", "culture and", "heritage of", "state"]
];

Answer 1

进行了一些更改。1）清除时，更改为str = item;而不是str = ''2）循环结束，执行arrayOfSingleString.push(str);添加最后一项。

const categories = [
  "Department of Natural Science",
  "Department of public health and sanitation",
  "Department of culture and heritage of state"
];

const arrayOfAllString = []; // results at the end

var x = categories.map(cur => {
  // looping the array
  const splitedItems = cur.trim().split(" "); // splitting the current string into words
  const arrayOfSingleString = []; //
  let str = "";
  splitedItems.forEach(item => {
    // looping the array of splitted words
    if (str.length + item.length > 13) {
      // trying to make a chunk
      arrayOfSingleString.push(str);
      str = item; // clearing the str because it has been pushed to arrayOfSingleString
    } else {
      str = str.concat(item + " "); ; // concat the str with curent word
    }
  });
  arrayOfSingleString.push(str);
  arrayOfAllString.push(arrayOfSingleString);
  return arrayOfSingleString;
});

console.log(x);

Answer 2

您可以使用生成器并以所需的长度返回块。

function* getJoined(string, size) {
    var array = string.split(' '),
        i = 0;

    while (i < array.length) {
        let s = array[i];
        while (++i < array.length && (s + array[i]).length < size) {
            s += ' ' + array[i];
        }
        yield s;
    }
}

console.log([...getJoined('Department of culture and heritage of state', 13)]);