在javascript中搜索对象数组中的重复字符串

Question

var names = [{id:1,name:"name1"}, {id:2,name:"name2"}, {id:3,name:"name1"}, {id:4,name:"name1"}, {id:5,name:"name2"}, {id:6,name:"name3"}]

这是我在javascript中的对象数组 - 我正在寻找一种方法来提取所有重复项和具有相同名称属性的个人 - 并将它们放入数组对象中。过滤掉重复的对象是我的当务之急。如果可能的话，在jQuery中做到这一点很好。

{
    [{id:1,name:"name1"},{id:3,name:"name1"}{id:4,name:"name1"}]
    [{id:2,name:"name2"},{id:5,name:"name2"}] 
    [{id:6,name:"name3"}]
}

Answer 1

你可以这样做：

var names = [{id:1,name:"name1"}, {id:2,name:"name2"}, {id:3,name:"name1"}, {id:4,name:"name1"}, {id:5,name:"name2"}, {id:6,name:"name3"}]

var sorted = {};

for (var i=0; i < names.length; i++) {
    if (!sorted[names[i].name]) {
        sorted[names[i].name] = [];
    }
    sorted[names[i].name].push(names[i]);
}

这是fiddle。

例如，如果您想要name == "name1"的所有项目的数组，您只需执行以下操作：

var allName1s = sorted["name1"];

Answer 2

Matt Burland给出的方法是找到重复的标准方法。我在这里使用它，但同时构建你正在寻找的数组数组。

var names = [{id:1,name:"name1"}, {id:2,name:"name2"}, {id:3,name:"name1"}, {id:4,name:"name1"}, {id:5,name:"name2"}, {id:6,name:"name3"}]

var collector = {};
var sorted = [];
for (var i = 0; i < names.length; ++i) {
    var entry = names[i];
    if (!(entry.name in collector)) {
        collector[entry.name] = [];
        sorted.push(collector[entry.name]);
    }
    collector[entry.name].push(entry);
}
console.dir(collector);
console.dir(sorted);

必备Fiddle

Answer 3

如果你想将数据分类为有效和重复，我会这样做：

使用Javascript：

<script type="text/javascript">

var names = [{id:1,name:"name1"}, {id:2,name:"name2"}, {id:3,name:"name1"}, {id:4,name:"name1"}, {id:5,name:"name2"}, {id:6,name:"name3"}]

var parsed_names = parseNames(names);

console.log(parsed_names);

function parseNames(names) 
{
    var parsed_data = [];
    var duplicate_data = [];
    var name_list = [];
    for (var i = 0; i < names.length; i++) {
        if (!inArray(names[i].name, name_list)) {
            parsed_data.push(names[i]);
        } else {
            duplicate_data.push(names[i]);
        }
        name_list.push(names[i].name);
    }
    return {
        'ParsedData': parsed_data,
        'DuplicateData': duplicate_data
    };
}

function inArray(needle, haystack) {
    for (var i = 0; i < haystack.length; i++) {
        if (haystack[i] === needle) {
            return true;
        }
    }
    return false;
}

</script>

控制台输出（调试）：