如何在JavaScript中匹配另一个数组的相应值后，根据一个数组中的值提取数据？

Question

这是从 GeoServer 获取特征信息的 URL

{"type":"FeatureCollection","features":[{"type":"Feature","id":"weather_warning_day_1.fid--418ec0da_178b69d5dfc_-715c","geometry":null,"properties":{"issue_date":"2021-04-09","updated_at":"2021-04-09T09:26:33+05:30","utc_time":0,"state_name":"Odisha","state_id":21,"district_name":"MAYURBHANJ","district_id":232,"api_district_name":"MAYURBHANJ","day_1":"6,9,10","day1_color":3}}],"totalFeatures":"unknown","numberReturned":1,"timeStamp":"2021-04-09T15:38:19.536Z","crs":null}

我要提取的数据是可变的：“day_1”：“6,9,10” 我从图层中获取并将其存储在变量中

var warning_day_1 = weather_warning_layer_data.features[0].properties.day_1

所以基本上输入是 "day_1":"6,9,10" 我已将其存储在数组中

[{"warning":"6"},{"warning":"9"},{"warning":"10"}]

相应的输出应该是沙尘暴、热浪、炎热天气

Dust Storm, Heat Wave, Hot Day

或者如果输入是 "day_1":"2,5" 那么输出应该是 Heavy Rain, Hailstorm

或者如果输入是 "day_1":"1" 那么输出应该是 No Warning

读取字符串的数据并创建其数组后，我必须将其与另一个数组进行比较，并提取与第一个数组中的键值（警告）对应的键值（显示）。

var warning_data_split = warning_day_1.split(/[ ,]+/);
var warning_data_from_api_array = new Array;
warning_data_from_api_array.push(warning_data_split);


for (var i = 0; i < warning_data_from_api_array.length; i++) {
var item_in_array_to_compare = warning_data_from_api_array[i];
if(warning_data_from_api_array[item_in_array_to_compare.warning_data_from_api_array])
{warning_data_from_api_array[item_in_array_to_compare.warning_data_from_api_array].push(item_in_array_to_compare);} 
else {
warning_data_from_api_array[item_in_array_to_compare.warning_data_from_api_array] = [item_in_array_to_compare];}}

let final_array_to_compare = item_in_array_to_compare
final_array_to_compare = final_array_to_compare.map(x => ({warning: x})); 
/// this is the first array ////////////

这个数组中的值的长度不是静态的，因为它不断变化，有时数组的值为 [1] 或 [1,2]、[2,5,8]、[4,7 ,12]等所以我必须从下面给出的查找数组中提取相应的显示值

var warning_code_meaning_list = [
{ warning:"1", display:"No Warning"}, 
{ warning:"2", display:"Heavy Rain"}, 
{ warning:"3", display:"Heavy Snow"}, 
{ warning:"4", display:"Thunderstorm & Lightning, Squall etc"},  
{ warning:"5", display:"Hailstorm"},
{ warning:"6", display:"Dust Storm"},
{ warning:"7", display:"Dust Raising Winds"},
{ warning:"8", display:"Strong Surface Winds"},
{ warning:"9", display:"Heat Wave"},
{ warning:"10", display:"Hot Day"},
{ warning:"11", display:"Warm Night"},
{ warning:"12", display:"Cold Wave"},
{ warning:"13", display:"Cold Day"},
{ warning:"14", display:"Ground Frost"},
{ warning:"15", display:"Fog"}
]

我在 warning_day_1 中得到的数据（在代码的第一行）是一个字符串（这不能在数据库列中保存为 float/integer 因为有时特定位置有超过 1 个警告，因此我将其作为文本存储在数据库中）从 API

读取后，我将其转换为数组

现在我从 API 中获取的这个字符串有可变数据，有时个位数，例如：1 有时是多个：1,2,3

并且此数组中存在的每个整数都对应于下一个数组中显示的特定文本，例如如果警告为 2，则表示强降雨，但如果字符串（后来转换为数组，以“warning”为键）的值为 2,5，则表示：heavy raining & Hailstorm

我希望数组 1（动态数组）中出现的值与第二个数组（一种查找数组）匹配，并获取其显示值作为输出。

如何操作？

Answer 1

您可以使用对象将警告映射到消息。

试试这个：

const data = {"type":"FeatureCollection","features":[{"type":"Feature","id":"weather_warning_day_1.fid--418ec0da_178b69d5dfc_-715c","geometry":null,"properties":{"issue_date":"2021-04-09","updated_at":"2021-04-09T09:26:33+05:30","utc_time":0,"state_name":"Odisha","state_id":21,"district_name":"MAYURBHANJ","district_id":232,"api_district_name":"MAYURBHANJ","day_1":"6,9,10","day1_color":3}}],"totalFeatures":"unknown","numberReturned":1,"timeStamp":"2021-04-09T15:38:19.536Z","crs":null}
var warning_code_meaning_list = {
  "1":"No Warning",
  "2":"Heavy Rain",
  "3":"Heavy Snow",
  "4":"Thunderstorm & Lightning, Squall etc", 
  "5":"Hailstorm",
  "6":"Dust Storm",
  "7":"Dust Raising Winds",
  "8":"Strong Surface Winds",
  "9":"Heat Wave",
  "10":"Hot Day",
  "11":"Warm Night",
  "12":"Cold Wave",
  "13":"Cold Day",
  "14":"Ground Frost",
  "15":"Fog",
};

results = data["features"].map(feature => {
  return feature.properties.day_1.split(',').map(code => {
    return warning_code_meaning_list[code];
  });
});

这为您提供了一组显示数组：

[ [ 'Dust Storm', 'Heat Wave', 'Hot Day' ] ]

如何在JavaScript中匹配另一个数组的相应值后，根据一个数组中的值提取数据？

How to Extract data based on the values in one array after matching the corresponding values from another array in JavaScript?

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