如何製作JSON字典的詞典？

Question

現在我有一個JSON

"Types":[ 
      { 
       "LowCadence":[ 
        { 
        "Reinforcement":"-1", 
        "Weight":"100", 
        "Message":"Pay attention. You're running low cadence. Your cadence is %d steps per minute." 
        } 
       ] 
      }, 
      { 
       "NormalCadence":[ 
        { 
        "Reinforcement":"0", 
        "Weight":"100", 
        "Message":"Great, your cadence is on target. Cadence is %d steps per minute.", 
        "EnforcementSound":"ding" 
        } 
       ] 
      }, 
      { 
       "HighCadence":[ 
        { 
        "Reinforcement":"1", 
        "Weight":"100", 
        "Message":"Slow down. You're running over your planned cadence. Cadence is %d steps per minute." 
        } 
       ] 
      } 
     ] 

這個結構，但我想它有這樣的結構

有誰知道如何把它寫在JSON？

Answer 1

我相信你的JSON看起來像這樣：

var Types = { 
    NormalHR: { 
     Reinforcement: 0, 
     Weight: 100, 
     Message: 'Great! Your heart rate is in the zone.', 
     EnforcementSound: 'ding' 
    }, 
    HighHR: { 
     Reinforcement: 1, 
     Weight: 100, 
     Message: 'Slow down. Your heart rate is too high!' 
    }, 
    LowHR: { 
     Reinforcement: -1, 
     Weight: 100, 
     Message: 'Speed up. Low heart rate.' 
    } 
}; 

As @Balder says在他們的回答，您可以訪問使用字典風格的語法，如：

• Types['NormalHR']['Reinforcement']

您還可以使用屬性訪問器的語法，如：

• Types.NormalHR.Reinforcement

我不包括每個項目的「類型」的原因是，你可以輕易推斷它爲建築納克網格 - 如下：

• typeof Types.NormalHR.Reinforcement（這將返回"number"）
• typeof Types.NormalHR.Message（這將返回"string"）

同樣，得到計數 - 你可以指望的屬性特定對象。在現代瀏覽器，嘗試：

• Object.keys(Types.NormalHR).length（這將返回2）

對於舊的瀏覽器，參考其他方法在這裏：How to efficiently count the number of keys/properties of an object in JavaScript?

希望這有助於！

Answer 2

你沒有json中的「字典」，但你有鍵/值數組，它們的工作方式與他們非常相似。

在你的代碼，如果你想訪問：

普通的Cadence>信息您只需必須做到：

Types["NormalCadence"]["Message"] 

類似於淨詞典，但不完全是一個字典

Answer 3

在Objective C中，你可以寫：

NSDictonary *types = @{ 
@"NormalHR": @{ 
    @"Reinforcement": [NSNumber numberWithInt:0], 
    @"Weight": [NSNumber numberWithInt:100], 
    @"Message": @"Great! Your heart rate is in the zone.", 
    @"EnforcementSound": @"ding" 
}, 
@"HighHR": @{ 
    @"Reinforcement": [NSNumber numberWithInt:1], 
    @"Weight": [NSNumber numberWithInt:100], 
    @"Message": @"Slow down. Your heart rate is too high!" 
}, 
@"LowHR": @{ 
    @"Reinforcement": [NSNumber numberWithInt:-1], 
    @"Weight": [NSNumber numberWithInt:100], 
    @"Message": @"Speed up. Low heart rate." 
} 

};