根据另一个对象数组中的过滤条件来过滤对象数组：JavaScript

问题描述

我希望根据 myFilter 中提到的条件过滤 myArray 。
myFilter的键已定义，可以使用 myFilter.field ， myFilter.value 进行访问。键： myArray 的值未知。
我们可能必须遍历 myArray 中的每个对象，才能首先将myArray [key]与 myFilter.field 然后将myArray [key]指向myFilter.value。

I wish to filter myArray based on criteria mentioned in myFilter.The keys of myFilter are defined and could be accessed using myFilter.field, myFilter.value where as key:value of myArray are unknown.We might have to iterate over each object in myArray to first match the myArray [key] with myFilter.field and then to that myArray [key] to myFilter.value.

这应该是AND逻辑

myArray = [{
    make: "Honda",
    model: "CRV",
    year: "2017"
  },
  {
    make: "Toyota",
    model: "Camry",
    year: "2020"
  },
  {
    make: "Chevy",
    model: "Camaro",
    year: "2020"
  }
]

myFilter = [{
    field: "make",
    value: "Chevy",
    type: "string"
  },
  {
    field: "year",
    value: "2020",
    type: "date"
  }
];


// Expected OutPut:
myArray = [{
  make: "Chevy",
  model: "Camaro",
  year: "2020"
}]


var tempArray = [];
const keysToMatch = myFilter.length;
let matchedItems = [];
myArray.forEach((data) => {
  matchedItems = [];
  let itemsToFind = Object.values(data);
  myFilter.forEach((filterItem) => {
    if (itemsToFind.indexOf(filterItem.value) != -1) {
      matchedItems.push("matched");
    }
  });
  //check if everything matched
  if (matchedItems.length === keysToMatch) {
    tempArray.push(data);
  }
});

console.log(tempArray);

推荐答案

根据您的需要，这可能有些复杂，但是可以。

This might be a bit over complicated for what you need, but it works.

myArray = [
    {
        make: "Honda",
        model: "CRV",
        year: "2017"
    },
    {
        make: "Toyota",
        model: "Camry",
        year: "2020"},
    {
        make: "Chevy",
        model: "Camaro",
        year: "2020"}
    ]

    myFilter = [
        {
            field: "make",
            value: "Chevy",
            type: "string"
        },
        {
            field: "year",
            value: "2020",
            type: "date"
        }
    ];
         //only return those that return true
var newArray = myArray.filter(car => {
	var temp = true;
    //iterate over your filters
	for (var i = 0; i < myFilter.length; i++) {
        //if any filters result in false, then temp will be false
		if (car[myFilter[i].field] != myFilter[i].value) {
			temp = false;
		}
	}
	if (temp == true) {
		return true;
	} else {
		return false;
	}
});
console.log(JSON.stringify(newArray));
    

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