javascript - 基于对象数组中不同单位的总和值

Question

我陷入困境，我有 JSON 响应，例如

[{
    "product": "CLINISod",
    "potentiation": "BIOLOGICALLY ACTIVE",
    "dose": "2 acs",
    "period": "all",
    "in": "Morning"
}, {
    "product": "CLINISod",
    "potentiation": "BIOLOGICALLY ACTIVE",
    "dose": "1 acs",
    "period": "all",
    "in": "Evening"
}, {
    "product": "CLINISod",
    "potentiation": "BIOLOGICALLY ACTIVE",
    "dose": "2 cs",
    "period": "all",
    "in": "Morning"
}, {
    "product": "CLINISod",
    "potentiation": "BIOLOGICALLY ACTIVE",
    "dose": "1 cs",
    "period": "all",
    "in": "Evening"
}];

所以，我想获得具有数量+单位的dose键，但使用jQuery进行响应我想获得结果 例如- 3 个 Acs，3 个 cs。

Answer 1

您可以使用Array#forEach 迭代对象数组并创建对象来存储结果。

// An object to store the result
var result = {};

// Iterate over array of objects
arr.forEach(function(obj) {
    // Extract quantity & unit
    var quantity = parseInt(obj.dose.match(/\d+/)[0], 10),
        unit = obj.dose.replace(/\d+/, '').trim();

    // If the unit already exists in the result object
    //    Add the quantity to it
    // else
    //    Store the quantity
    result[unit] = result[unit] ? result[unit] + quantity : quantity;
});

var arr = [{
    "product": "CLINISod",
    "potentiation": "BIOLOGICALLY ACTIVE",
    "dose": "2 acs",
    "period": "all",
    "in": "Morning"
}, {
    "product": "CLINISod",
    "potentiation": "BIOLOGICALLY ACTIVE",
    "dose": "1 acs",
    "period": "all",
    "in": "Evening"
}, {
    "product": "CLINISod",
    "potentiation": "BIOLOGICALLY ACTIVE",
    "dose": "2 cs",
    "period": "all",
    "in": "Morning"
}, {
    "product": "CLINISod",
    "potentiation": "BIOLOGICALLY ACTIVE",
    "dose": "1 cs",
    "period": "all",
    "in": "Evening"
}];

var result = {};
arr.forEach(function(obj) {
    var quantity = parseInt(obj.dose.match(/\d+/)[0], 10),
        unit = obj.dose.replace(/\d+/, '').trim();
    result[unit] = result[unit] ? result[unit] + quantity : quantity;
});

console.log(result);

上面的代码将以对象格式给出结果，如果您想要数组格式，只需添加

Object.keys(result).map(key => result[key] + ' ' + key)

在代码底部。

var arr = [{
    "product": "CLINISod",
    "potentiation": "BIOLOGICALLY ACTIVE",
    "dose": "2 acs",
    "period": "all",
    "in": "Morning"
}, {
    "product": "CLINISod",
    "potentiation": "BIOLOGICALLY ACTIVE",
    "dose": "1 acs",
    "period": "all",
    "in": "Evening"
}, {
    "product": "CLINISod",
    "potentiation": "BIOLOGICALLY ACTIVE",
    "dose": "2 cs",
    "period": "all",
    "in": "Morning"
}, {
    "product": "CLINISod",
    "potentiation": "BIOLOGICALLY ACTIVE",
    "dose": "1 cs",
    "period": "all",
    "in": "Evening"
}];

var result = {};
arr.forEach(function(obj) {
    var quantity = parseInt(obj.dose.match(/\d+/)[0], 10),
        unit = obj.dose.replace(/\d+/, '').trim();
    result[unit] = result[unit] ? result[unit] + quantity : quantity;
});

var arr = Object.keys(result).map(key => result[key] + ' ' + key);
console.log(arr);