如何在对象数组中找到一个对象的所有匹配键和值？

Question

I need a code which would loop through an array of objects and check if keys and values match with ones in a separate object, and then push object that contains all keys and values in a new array, so for a specific case:

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};

result would be:

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

Answer 1

expanding @Psidom version

 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

Use filter on the Array:

 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) );