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首页 > 解决方案 > 如何最好地解析成分列表中的每一项，并根据每个解析结果创建一个新对象？

javascript - 如何最好地解析成分列表中的每一项，并根据每个解析结果创建一个新对象？

问题描述

我有这个成分列表，我正在尝试制作一个正则表达式来寻找1 cup，或者 1tsp或 1 汤匙等等......

我已经制作了这个正则表达式，但它也不起作用。我正在尝试将成分与测量结果分开。

因此，使用此字符串1 Chopped Tomato，它应该取出1as 金额并输出：

const output = [
  {
    val: "Chopped Tomato",
    amount: "1",
  },

有了下面的这个字符串，它应该能够从中取出½ tsp并½ tsp fine salt输出：

const output = [
  {
    val: "fine sea salt",
    amount: "½ tsp",
  },

这些是我用于测量的值：

    const measures = [
      "tbsp","tablespoon","tsp","teaspoon","oz","ounce","fl. oz","fluid ounce","cup","qt",
      "quart","pt","pint","gal","gallon","mL","ml","milliliter","g","grams","kg","kilogram","l","liter",
];

这是我构建的输入和正则表达式

const Ingris = [
  "1 teaspoon heavy cream",
  "1 Chopped Tomato",
  "1/2 Cup yogurt",
  "1 packet pasta ",
  "2 ounces paprika",
]


const FilterFunction = (term) => {
  let data = []
  if (term) {
    const newData = Ingris.filter(({
      ingridients
    }) => {
      if (RegExp(term, "gim").exec(ingridients))
        return ingridients.filter(({
            val
          }) =>
          RegExp(term, "gim").exec(val)
        ).length;
    })
    data.push(newData)
  } else {
    data = []
  }
};
console.log(FilterFunction("cup"))

期望的输出：

const output = [
  {
    val: "Tomato",
    amount: "1 Chopped ",
  },
  {
    val: "yogurt",
    amount: "1/2 Cup",
  },
  {
    val: "1",
    amount: "packet pasta ",
  },
  {
    val: "fine sea salt",
    amount: "½ tsp",
  },
  {
    val: "heavy cream",
    amount: "1/2 teaspoon",
  },
  {
    val: "paprika",
    amount: "2 ounces",
  },
];

标签： javascriptarraysregexparsingmapping

解决方案

这是当我添加数据包和盎司（复数）时起作用的东西

它处理

  • 只是数量如 1、2、¼、½、¾ 和 1/2
  • 只是没有数量的词，例如“碎肉”
  • 复合度量，例如单复数的“液量盎司”
  • 切碎或磨碎等动作词

全部由一个半正则表达式和一个解构赋值处理

const measures = [
  "tbsp", "tablespoon", "tsp", "teaspoon", "oz", "ounce", "ounces", "cup", "qt", "packet", "quart", "pt", "pint", "gal", "gallon", "mL", "ml", "milliliter", "g", "grams", "kg", "kilogram", "l", "liter", 
  "fl. oz", "fluid ounce", "fluid ounces" ]; // plural after singular!
const action = ["chopped","ground"]  

const compound = measures.filter(measure => measure.split(" ").length > 1); // extract compound words

const amountRe =     /^(\d+\/\d+|¼|½|¾|\d|\d+)/; // amounts like 1, 1/2 etc
const amountValueRe = /(\d+\/\d+|¼|½|¾|\d|\d+) ([\w.]+) (.*)/; // first part must be the same as amountRe

const makeList = list => list.map(line => {
  if (!amountRe.test(line)) return { value: line }; // no amounts found

  // test for compound measures
  compound.forEach(cmp => line = line.replace(cmp, cmp.split(" ").join("_"))); // add underscores if found
  
  // destruct the match on amount plus value or amount of amount plus value
  let [, num, measure, what] = line.match(amountValueRe);
  
  if (action.includes(measure.toLowerCase())) { // test for chopped
    what = `${measure} ${what}`; // or add an action item to the object
    measure = "";
  }
  
  const obj = {}
  if (num) obj.amount = num;
  if (measure) obj.measure = measure.split("_").join(" ").trim(); // remove added underscores
  if (what) obj.value = what;
  return obj;
});

const Ingris = [
  "Chicken breast",
  "Ground ginger",
  "1 teaspoon heavy cream",
  "2 fluid ounces lemon juice",
  "1 Chopped Tomato",
  "1/2 Cup yogurt",
  "2 fl. oz paprika",
  "1 fluid ounce water",
  "½ packet pasta ",
  "2 ounces paprika"
];

console.log(makeList(Ingris))

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