Question

在我的代码的一部分中，我将从JSON文件中提取数据并将其放置在基于对象的数组中。

我成功接收了数据，并且可以将每个数据放在数组中的单个对象上。唯一的问题是，我想给每个对象起一个名字。

class loginUser:
    def __init__(self, window, master=None):   
        self.wind = window
        self.wind.title("System F2T")

        #Definicoes de fonte p/ o layout de login
        self.fonteTitulo = ("Arial","10","bold")
        self.fontePadrao = ("Arial", "10")

        #Labels e campos de texto do sistema de login
        self.userLabel = Label(text="Digite seu usuário:", font=self.fontePadrao,bg="#000",fg="#FFF").place(x=27,y=60)
        self.user = Entry(textvariable=self.var, font=self.fontePadrao,bg="#FFF",fg="#000")
        self.user.place(x=140,y=60,width=110)

        self.senhaLabel = Label(text="Digite sua senha:", font=self.fontePadrao,bg="#000",fg="#FFF").place(x=29,y=90)
        self.senha = Entry(textvariable=self.var2, font=self.fontePadrao,show="*",bg="#FFF",fg="#000")
        self.senha.place(x=140,y=90,width=110)

        self.max_user = 1
        self.var = StringVar()
        self.var.trace("w", loginUser.limiteUsuario)
        self.max_senha = 4
        self.var2 = StringVar()
        self.var2.trace("w", loginUser.limiteSenha)

    def limiteUsuario(self,*args):
        u = self.var.get()
        if len(u) == 1 and not 65<=ord(u)<=68: # you can also use *if not u in "ABCD"*
            self.var.set("")
        elif len(u) > 1:
            if not 65<=ord(u[-1])<=68: # retirar ultimo caracter caso nao seja digito
                self.var.set(u[:-1])
            else: # aproveitar apenas os primeiros 5 chars
                self.var.set(u[:self.max_user])

    def limiteSenha(self,*args):
        s = self.var2.get()
        if len(s) > 4:
            if not s[-1].isdigit(): # retirar ultimo caracter caso nao seja digito
                self.var2.set(s[:-1])
            else: # aproveitar apenas os primeiros 5 chars
                self.var2.set(s[:self.max_senha])

if __name__ == "__main__":
    root = Tk()
    root['bg'] = "#000"
    loginUser(root)
    #Tamanho da janela
    root.geometry("330x200")
    root.mainloop()

var playlist_data = {
  "Music1": {
    "soundcloud": "Soundcloud Music 1",
    "spotify": "Spotify Music 1"
  },
  "Music2": {
    "soundcloud": "Soundcloud Music 2",
    "spotify": "Spotify Music 2"
  },
  "Music3": {
    "soundcloud": "Soundcloud Music 3",
    "spotify": "Spotify Music 3"
  },
  "Music4": {
    "soundcloud": "Soundcloud Music 4",
    "spotify": "Spotify Music 4"
  }
};
var links = [];
$.each(playlist_data, function(index, element) {
  links.push({
    spotify: element.spotify,
    soundcloud: element.soundcloud,
  });
});

console.log(links);

在上面的代码中，似乎复制了相同的JSON数据，但它是简化版本。

因此，我想将其命名为<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>和links.Music2

Answer 1

由于Javascript不支持命名索引，因此您必须将links作为对象才能通过links.Music2.spotify访问其属性。这很容易做到，但是，它只会为您提供与开始时完全相同的数据：

var playlist_data = {
  "Music1": {
    "soundcloud": "Soundcloud Music 1",
    "spotify": "Spotify Music 1"
  },
  "Music2": {
    "soundcloud": "Soundcloud Music 2",
    "spotify": "Spotify Music 2"
  },
  "Music3": {
    "soundcloud": "Soundcloud Music 3",
    "spotify": "Spotify Music 3"
  },
  "Music4": {
    "soundcloud": "Soundcloud Music 4",
    "spotify": "Spotify Music 4"
  }
};
var links = {};
$.each(playlist_data, function(index, element) {
  links[index]= {
    spotify: element.spotify,
    soundcloud: element.soundcloud,
  };
});

console.log(links);
console.log(links.Music2.spotify)

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

Answer 2

您可以使用以下代码命名每个obj

this.letters

Answer 3

似乎您想将spotify用作links的密钥。

JS中有两种类型的数组：

标准数组为[ ]

关联数组为{ }！

如您所见，您可以使用{ }，它在javascript中也是一个对象，它是一个数组。然后，您可以使用spotify作为密钥。因此，您的代码将如下所示：

var links = {};
$.each(playlist_data, function(index, element) {
  links[index] = {
    spotify: element.spotify,
    soundcloud: element.soundcloud,
  };
});
console.log(links_s.Music1.spotify) // Spotify Music 1

为array.push（）中的对象命名

3 个答案: