Question

我有一系列独特元素，uniqueID，与＆＃34; ID＆＃34;匹配。对象的属性是contentBlock数组。到目前为止，我的代码遍历uniqueID和contentBlock数组，并查找uniqueID中的元素值何时等于contentBlock中的ID值。

如果uniqueID等于ID值，我想现在返回对象的属性标题，年龄和状态（NOT ID），但不确定如何在我的forEach循环中打印这些多个属性，有人可以指导我这个？

var uniqueID = ["a", "c"];

var contentBlock = [
  {
    title: "John",
    age: 24,
    state: "NY",
    ID: "a"
}, 
{
    title: "Jane",
    age: 27,
    state: "CA",
    ID: "b"
}, 
{
    title: "Joe",
    age: 32,
    state: "NY",
    ID: "c"
}, 
{
    title: "Carl",
    age: 43,
    state: "MI",
    ID: "d"
} 
]


uniqueID.forEach(function (item) {
  contentBlock.forEach(function(tile) {
    if (item === tile.ID) {
//return these properties of each object identified as unique
        console.log(tile.title);
        console.log(tile.age)
        console.log(tile.state)
    }
  })
})

Answer 1

我建议你改用Array#filter。

＆＃13;

var contentBlock = [{title:"John",age:24,state:"NY",ID:"a"},{title:"Jane",age:27,state:"CA",ID:"b"},{title:"Joe",age:32,state:"NY",ID:"c"},{title:"Carl",age:43,state:"MI",ID:"d"}], uniqueID = ["a", "c"],
    hash = contentBlock.filter(v => uniqueID.indexOf(v.ID) > -1),
    res = hash.map(v => Object.assign({}, {title: v.title, age: v.age, state: v.state}));
    
    console.log(res);

＆＃13;

循环访问对象以打印特定属性？

1 个答案: