如何使用lodash.js或underscore.js過濾json？

Question

我想敲我的腦袋來過濾下面寫的JSON來獲得所需的結果。

[{ 
     "Key": "EShSOKthupE=", 
     "ImageUrl": "path", 
     "Title": "ABC", 
     "CityId": 16, 
     "TimezoneShortName": "PYT", 
     "UtcHrsDiff": 8.5, 
     "PlaceKey": "QIZHdWOa77o=", 
     "PlaceName": "Shymala Hills Slums", 
     "Lat": 23.2424856, 
     "Long": 77.39488289999997, 
     "ActivityList": [ "Test Activity" ] 
     }, 
     { 
     "Key": "NXLQpZAZT4M=", 
     "ImageUrl": "", 
     "Title": "ASAS", 
     "CityId": 17, 
     "TimezoneShortName": "AEST", 
     "UtcHrsDiff": 10, 
     "PlaceKey": "o4fAkahBzYY=", 
     "PlaceName": "ASAS", 
     "Lat": 12.9856503, 
     "Long": 77.60569269999996, 
     "ActivityList": [ "Adventure Sport" ] 
     }] 

現在我想從上面的json獲得像這樣的json，使用lodash或者requirejore js。

[{ 
    "PlaceKey": "QIZHdWOa77o=", 
    "PlaceName": "ABC", 
    "Lat": 23.2424856, 
    "Long": 77.39488289999997 
    }, 
    { 
    "PlaceKey": "o4fAkahBzYY=", 
    "PlaceName": "ASAS", 
    "Lat": 12.9856503, 
    "Long": 77.60569269999996, 
    }] 

我可以得到這個幫助嗎？

Answer 1

你可以做到這一點簡單的Javascript，無需像任何外部庫：

filteredArray=arr.map(function(item){ 
    return { 
    "PlaceKey": item.PlaceKey, 
    "PlaceName": item.PlaceName, 
    "Lat": item.Lat, 
    "Long": item.Long, 
    } 
}) 

Answer 2

使用lodash：

_.map(yourArray, (el => _.pick(el, ['PlaceKey', 'PlaceName', 'Lat', 'Long']))) 

Answer 3

使用_.map功能

var finalArray = _.map(your_arr, function(obj) { 
    return { 
    "PlaceKey": obj.PlaceKey, 
    "PlaceName": obj.PlaceName, 
    "Lat": obj.Lat, 
    "Long": obj.Long, 
    } 
}); 

或者只是使用數組map功能：

var finalArray = your_arr.map(function(obj) { 
    return { 
    "PlaceKey": obj.PlaceKey, 
    "PlaceName": obj.PlaceName, 
    "Lat": obj.Lat, 
    "Long": obj.Long, 
    } 
});