如何在Javascript中从Json数组创建路径路径？

I have a array consist some random city names , Another Array of json object which consist the Source and Destination of Individual cities , But this route array of individual cities are not in a sequence. I need to make it in a sequence in order they visited , I am unable to make the logic .. please help ..

我有一个数组包含一些随机城市名称,另一个json对象数组,它包含各个城市的源和目的地,但是这些单个城市的路径数组不在一个序列中。我需要按照他们访问的顺序制作它,我无法制作逻辑..请帮助..

Array of Cities (Dynamic Size):

城市数组(动态大小):

var CITIES = ["PARIS","LONDON","DELHI","SINGAPORE","DUBAI"]

Json Array of Route (In Random Sequence) :

路径的Json数组(在随机序列中):

var CITY_ROUTE = {"ROUTE":[
{"CURRENT_CITY":"PARIS","NEXT_CITY":"LONDON","PREVIOUS_CITY":"DUBAI",},
{"CURRENT_CITY":"DELHI","NEXT_CITY":"SINGAPORE","PREVIOUS_CITY":"LONDON"},
{"CURRENT_CITY":"LONDON","NEXT_CITY":"DELHI","PREVIOUS_CITY":"PARIS"},
{"CURRENT_CITY":"SINGAPORE","NEXT_CITY":"","PREVIOUS_CITY":"DELHI"},
{"CURRENT_CITY":"DUBAI","NEXT_CITY":"PARIS","PREVIOUS_CITY":""}
]};

/Required to Rearange the Json Object in Visiting sequence where Starting City will have null PREVIOUS_CITY value and Last City will have null  NEXT_CITY Value/


var CITY_ROUTE_IN_SEQUENCE = {"ROUTE":[
{"CURRENT_CITY":"DUBAI","NEXT_CITY":"PARIS","PREVIOUS_CITY":""}
{"CURRENT_CITY":"PARIS","NEXT_CITY":"LONDON","PREVIOUS_CITY":"DUBAI",},
{"CURRENT_CITY":"LONDON","NEXT_CITY":"DELHI","PREVIOUS_CITY":"PARIS"},
{"CURRENT_CITY":"DELHI","NEXT_CITY":"SINGAPORE","PREVIOUS_CITY":"LONDON"},
{"CURRENT_CITY":"SINGAPORE","NEXT_CITY":"","PREVIOUS_CITY":"DELHI"}
]};

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