Question

我有一个javscript数组变量，每个数组元素都有对象值

 {"ID":10075,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":11,"GROUPID":1}

和整个JSON.stringify值如下...

 "[{"ID":10075,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":11,"GROUPID":1},
  {"ID":10076,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":14,"GROUPID":1},
  {"ID":-1,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":0,"GROUPID":0},
  {"ID":10077,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":11,"GROUPID":2},
  {"ID":-1,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":0,"GROUPID":0},
  {"ID":10078,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":92,"GROUPID":3}]"

如何在不同数组中存储数组值，基于ID值为-1 我的输出应该是： -

具有2个记录的第一个数组，其id为： - 10075,10076

第二个数组有1个记录，其id为： - 10077

第三个数组有1个记录，其id为： - 10078

Answer 1

看起来你想要GROUPID不等于0的那些

function arrayParse(value){ 
    var result = [];

    value.forEach(function (v) {
        if (v.GROUPID) {
            if(!result[v.GROUPID])
                 result[v.GROUPID] = [];
            result[v.GROUPID].push(v.ID);
        }
    });

    return result;
}

Answer 2

您可以将项目分隔的项目与ID === -1分组。此提议适用于实际组的结果集和组数组。

您可以使用Array#forEach

中的thisArg

＆＃13;

var array = [{ ID: 10075, SPECIALIZATIONID: "17", PRESPCIALIZATIONID: 11, GROUPID: 1 }, { ID: 10076, SPECIALIZATIONID: "17", PRESPCIALIZATIONID: 14, GROUPID: 1 }, { ID: -1, SPECIALIZATIONID: "17", PRESPCIALIZATIONID: 0, GROUPID: 0 }, { ID: 10077, SPECIALIZATIONID: "17", PRESPCIALIZATIONID: 11, GROUPID: 2 }, { ID: -1, SPECIALIZATIONID: "17", PRESPCIALIZATIONID: 0, GROUPID: 0 }, { ID: 10078, SPECIALIZATIONID: "17", PRESPCIALIZATIONID: 92, GROUPID: 3 }],
    grouped = [];

array.forEach(function (o) {
    if (!this.group || o.ID === -1) {
        this.group = [];
        grouped.push(this.group);
    }
    if (o.ID !== -1) {
        this.group.push(o);
    }
}, { group: null });

console.log(grouped);

＆＃13;

.as-console-wrapper { max-height: 100% !important; top: 0; }

＆＃13;

或Array#reduce回调中的group变量的封闭。

＆＃13;

var array = [{ ID: 10075, SPECIALIZATIONID: "17", PRESPCIALIZATIONID: 11, GROUPID: 1 }, { ID: 10076, SPECIALIZATIONID: "17", PRESPCIALIZATIONID: 14, GROUPID: 1 }, { ID: -1, SPECIALIZATIONID: "17", PRESPCIALIZATIONID: 0, GROUPID: 0 }, { ID: 10077, SPECIALIZATIONID: "17", PRESPCIALIZATIONID: 11, GROUPID: 2 }, { ID: -1, SPECIALIZATIONID: "17", PRESPCIALIZATIONID: 0, GROUPID: 0 }, { ID: 10078, SPECIALIZATIONID: "17", PRESPCIALIZATIONID: 92, GROUPID: 3 }],
    grouped = array.reduce(function (group) {
        return function (r, o) {
            if (!group || o.ID === -1) {
                group = [];
                r.push(group);
            }
            if (o.ID !== -1) {
                group.push(o);
            };
            return r;
        };
    }(), []);

document.write('<pre>' + JSON.stringify(grouped, 0, 4) + '</pre>');

console.log(grouped);

＆＃13;

.as-console-wrapper { max-height: 100% !important; top: 0; }

＆＃13;

结果在两种情况下都是一个新数组，其中包含给定数据的分组项的数组。不包含ID === -1的项目。

Answer 3

您可以使用Array.prototype.filter（）创建一个函数，该函数将返回按组ID过滤的数组。

＆＃13;

var array = [{"ID":10075,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":11,"GROUPID":1},
  {"ID":10076,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":14,"GROUPID":1},
  {"ID":-1,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":0,"GROUPID":0},
  {"ID":10077,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":11,"GROUPID":2},
  {"ID":-1,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":0,"GROUPID":0},
  {"ID":10078,"SPECIALIZATIONID":"17","PRESPCIALIZATIONID":92,"GROUPID":3}];

function getGroup(groupId){
	return array.filter(function(object){
	return object.GROUPID === groupId;
});
}
var group0 = getGroup(0);
var group1 = getGroup(1);
var group2 = getGroup(2);
console.log(group2);

＆＃13;

如何根据条件将一个JS数组存储到不同的数组中

3 个答案: