如何检查对象数组是否具有重复的属性值? [英] How can I check if the array of objects have duplicate property values?

问题描述

我需要一些帮助来迭代数组，我总是卡住或重新发明轮子.

I need some help with iterating through array, I keep getting stuck or reinventing the wheel.

values = [
    { name: 'someName1' },
    { name: 'someName2' },
    { name: 'someName1' },
    { name: 'someName1' }
]

如何检查数组中是否有两个(或多个)相同的名称值?我不需要计数器，如果数组值不唯一，只需设置一些变量.请记住，数组长度是动态的，数组值也是如此.

How could I check if there are two (or more) same name value in array? I do not need a counter, just setting some variable if array values are not unique. Have in mind that array length is dynamic, also array values.

推荐答案

使用 array.prototype.map 和 array.prototype.some:

var values = [
    { name: 'someName1' },
    { name: 'someName2' },
    { name: 'someName4' },
    { name: 'someName2' }
];

var valueArr = values.map(function(item){ return item.name });
var isDuplicate = valueArr.some(function(item, idx){ 
    return valueArr.indexOf(item) != idx 
});
console.log(isDuplicate);

这篇关于如何检查对象数组是否具有重复的属性值?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！