如何在对象数组中找到一个对象的所有匹配键和值？

Question

我需要一个循环遍历对象数组并检查键和值是否与单独对象中的键和值匹配的代码，然后将包含所有键和值的对象推送到新数组中，因此对于特定情况：

var arr = [{name: 'john', lastname: 'roberts', children: 3},
           {name: 'john', lastname: 'green', children: null}, 
           {name: 'steve', lastname: 'baker', children: 3}];

var obj = {name: 'john', children: 3};

结果是：

arr2 = [{name: 'john', lastname: 'roberts', children: 3}];

Answer 1

扩展@Psidom 版本

var arr = [{name: 'john', lastname: 'roberts', children: 3},
           {name: 'john', lastname: 'green', children: null}, 
           {name: 'steve', lastname: 'baker', children: 3}];

var obj = {name: 'john', children: 3};

console.log(
  arr.filter(x => Object.keys(obj).every( k => x[k] == obj[k]))
);

Answer 2

在数组上使用filter：

var arr = [{name: 'john', lastname: 'roberts', children: 3},
           {name: 'john', lastname: 'green', children: null}, 
           {name: 'steve', lastname: 'baker', children: 3}];

var obj = {name: 'john', children: 3};

console.log(
  arr.filter(x => x.name === obj.name && x.children === obj.children)
);