js数组对象里面获取某个属性值相等的对象
例：
var outArr=[
{"name":"张三","id":1,age:18},
{"name":"李四","id":2,age:19},
{"name":"王五","id":3,age:18},
{"name":"小红","id":4,age:20},
{"name":"小明","id":5,age:17},
{"name":"小白","id":6,age:18}
];
var newArr = outArr.filter(function (obj) {
return obj.age== 18;
});
console.log(newArr); // [{"name":"张三","id":1,age:18},{"name":"王五","id":3,age:18},{"name":"小白","id":6,age:18}]
js获取两个数组及数组对象中相同和不相同的值
1、获取两个数组中相同的元素
var arr1 = [0,1,2,3,4,5];
var arr2 = [0,4,6,1,3,9];
function getArrEqual(arr1, arr2) {
let newArr = [];
for (let i = 0; i < arr2.length; i++) {
for (let j = 0; j < arr1.length; j++) {
if(arr1[j] === arr2[i]){
newArr.push(arr1[j]);
}
}
}
return newArr;
}
console.log(getArrEqual(arr1, arr2));
//[0, 4, 1, 3]2、获取两个数组中不相同的元素
var arr1 = [0,1,2,3,4,5];
var arr2 = [0,4,6,1,3,9];
function getArrDifference(arr1, arr2) {
return arr1.concat(arr2).filter(function(v, i, arr) {
return arr.indexOf(v) === arr.lastIndexOf(v);
});
}
console.log(getArrDifference(arr1,arr2));
// [2, 5, 6, 9]3、获取两个数组对象中相同的值
function getArrDifSameValue(arr1,arr2){
var result = [];
for(var i = 0; i < arr2.length; i++){
var obj = arr2[i];
var id = obj.id;
var isExist = false;
for(var j = 0; j < arr1.length; j++){
var aj = arr1[j];
var n = aj.id;
if(n == id){
isExist = true;
break;
}
}
if(isExist){
result.push(obj);
}
}
return result;
}
var arr1 = [ {"id": "A"},{"id": "B"}];
var arr2 = [ {"id": "A"}, {"id": "B"},{"id": "C"}];
console.log(getArrDifSameValue(arr1,arr2));4、获取两个数组对象中不相同的值
function getArrDifSameValue(arr1,arr2){
var result = [];
for(var i = 0; i < arr2.length; i++){
var obj = arr2[i];
var id = obj.id;
var isExist = false;
for(var j = 0; j < arr1.length; j++){
var aj = arr1[j];
var n = aj.id;
if(n == id){
isExist = true;
break;
}
}
if(!isExist){
result.push(obj);
}
}
return result;
}
var arr1 = [ {"id": "A"},{"id": "B"}];
var arr2 = [ {"id": "A"}, {"id": "B"},{"id": "C"}];
console.log(getArrDifSameValue(arr1,arr2));
// [{"id": "C"}]总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持编程网。
