使用jquery/javascript從使用jquery/javascript

Question

使用解析的json中的鍵值檢索值我試圖從我的JSON數據（下面）中使用傳入的區域和房屋類型參數獲取平均房價。 我很好，在傳入的'regionName'中進行迭代和匹配，然而我爲了匹配傳入的變量而努力地在房屋類型（我相信它們是數據中的鍵） 'literalHouseType'，目的是獲得那個房子類型的價格。 正如你可能知道的那樣，該函數一直工作到它在第一個循環中的區域相匹配，然後我卡住了。 我不是一個狂熱的程序員，所以任何類型的幫助都會很棒。提前致謝。

var jSonData = JSON.stringify([ { 
"Region_Name": "England", 
"Detached_Average_Price": "357425.4953", 
"Semi_Detached_Average_Price": "219615.157", 
"Terraced_Average_Price": "190095.3402", 
"Flat_Average_Price": "222355.8556" }, 

{"Region_Name": "Scotland", 
"Detached_Average_Price": "252491.6457", 
"Semi_Detached_Average_Price": "152351.671", 
"Terraced_Average_Price": "121237.8809", 
"Flat_Average_Price": "104417.6462" } 

功能用於：

var jSondata = jQuery.parseJSON(jSonData); 

$(document).ready(function() { 
GetAveragePriceByHouseTypeAndRegion("Detached_Average_Price", "England"); 
}); 

function GetAveragePriceByHouseTypeAndRegion(literalHouseType, regionName) { 

for (var i = 0; i < jSondata.length; i++) { 
    if (jSondata[i].Region_Name === regionName) { 

     for (var j = 0; j < Object.keys(jSondata[i]).length; j++) {     
      if (Object.keys(jSondata[i]).value === literalHouseType) { 
      //stuck here.. 
      } 
     } 
    }; 
} 

Answer 1

假設literalHouseType將看起來像"Detached"或"Semi_Detached"：

var data = [{ 
 
    "Region_Name": "England", 
 
    "Detached_Average_Price": "357425.4953", 
 
    "Semi_Detached_Average_Price": "219615.157", 
 
    "Terraced_Average_Price": "190095.3402", 
 
    "Flat_Average_Price": "222355.8556" 
 
    }, 
 

 
    { 
 
    "Region_Name": "Scotland", 
 
    "Detached_Average_Price": "252491.6457", 
 
    "Semi_Detached_Average_Price": "152351.671", 
 
    "Terraced_Average_Price": "121237.8809", 
 
    "Flat_Average_Price": "104417.6462" 
 
    } 
 
]; 
 

 
function getAveragePriceByHouseTypeAndRegion(literalHouseType, regionName) { 
 
    for (var i = 0; i < data.length; i++) { 
 
    if (data[i].Region_Name === regionName) { 
 
     return data[i][literalHouseType + "_Average_Price"]; 
 
    } 
 
    } 
 
} 
 

 
console.log(getAveragePriceByHouseTypeAndRegion("Semi_Detached", "Scotland")); // 152351.671

EDIT

基於問題的編輯，它看​​起來像像Detached_Average_Price字符串被傳遞作爲literalHouseType，所以代碼稍微簡單：

var data = [{ 
 
    "Region_Name": "England", 
 
    "Detached_Average_Price": "357425.4953", 
 
    "Semi_Detached_Average_Price": "219615.157", 
 
    "Terraced_Average_Price": "190095.3402", 
 
    "Flat_Average_Price": "222355.8556" 
 
    }, 
 

 
    { 
 
    "Region_Name": "Scotland", 
 
    "Detached_Average_Price": "252491.6457", 
 
    "Semi_Detached_Average_Price": "152351.671", 
 
    "Terraced_Average_Price": "121237.8809", 
 
    "Flat_Average_Price": "104417.6462" 
 
    } 
 
]; 
 

 
function getAveragePriceByHouseTypeAndRegion(literalHouseType, regionName) { 
 
    for (var i = 0; i < data.length; i++) { 
 
    if (data[i].Region_Name === regionName) { 
 
     return data[i][literalHouseType]; 
 
    } 
 
    } 
 
} 
 

 
console.log(getAveragePriceByHouseTypeAndRegion("Semi_Detached_Average_Price", "Scotland")); // 152351.671

EDIT 2

當然，如果你可以重塑你的數據，這更容易：

var data = { 
 
    "England": { 
 
    "Detached_Average_Price": "357425.4953", 
 
    "Semi_Detached_Average_Price": "219615.157", 
 
    "Terraced_Average_Price": "190095.3402", 
 
    "Flat_Average_Price": "222355.8556" 
 
    }, 
 
    "Scotland": { 
 
    "Detached_Average_Price": "252491.6457", 
 
    "Semi_Detached_Average_Price": "152351.671", 
 
    "Terraced_Average_Price": "121237.8809", 
 
    "Flat_Average_Price": "104417.6462" 
 
    } 
 
}; 
 

 
function getAveragePriceByHouseTypeAndRegion(literalHouseType, regionName) { 
 
    return data[regionName][literalHouseType]; 
 
} 
 

 
console.log(getAveragePriceByHouseTypeAndRegion("Semi_Detached_Average_Price", "Scotland")); // 152351.671