根据字段划分JSON对象数组

Question

示例JSON：

"employees":[
    {"firstName":"John", "lastName":"Doe", "address ": "India "}, 
    {"firstName":"Anna", "lastName":"Smith", "address ": "Europe "}, 
    {"firstName":"Peter","lastName":"Jones", "address ": " Canada "},
    {"firstName":"hem", "lastName":"fik", "address ": " Europe "}, 
    {"firstName":"kin", "lastName":"ress", "address ": " India "}, 
    {"firstName":"jack","lastName":"pink", "address ": "Canada "}
] 

我想根据地址字段将json数组上面分成多个数组。我的意思是一个JSON数组包含的地址是＆＃34; India＆＃34;，另一个有下一个等等的员工。

Answer 1

使用Array.prototype.filter()函数根据条件过滤掉数组元素。

var employees = [{
  "firstName": "John",
  "lastName": "Doe",
  "address ": "India "
}, {
  "firstName": "Anna",
  "lastName": "Smith",
  "address ": "Europe "
}, {
  "firstName": "Peter",
  "lastName": "Jones",
  "address ": " Canada "
}, {
  "firstName": "hem",
  "lastName": "fik",
  "address ": " Europe "
}, {
  "firstName": "kin",
  "lastName": "ress",
  "address ": " India "
}, {
  "firstName": "jack",
  "lastName": "pink",
  "address ": "Canada "
}];
var address = employees.map(function(val) {
  return val['address '].trim();
})
var arrays = {};
for (i in address) {
  arrays[address[i]] = employees.filter(function(val) {
    return val['address '].toLowerCase().indexOf(address[i].toLowerCase()) != -1;
  });
}
console.log(arrays);