javascript - 如何动态创建字典和添加键值对？

字典增加方式1

var dict = {};

dict['key'] = "testing";

console.log(dict);

像python一样工作:)

控制台输出：
Object {key: "testing"}

字典增加方式2

var blah = {}; // make a new dictionary (empty)
##
var blah = {key: value, key2: value2}; // make a new dictionary with two pairs 
## 
blah.key3 = value3; // add a new key/value pair
blah.key2; // returns value2
blah['key2']; // also returns value2

参考

javascript - 如何动态创建字典和添加键值对？ - ITranslater

其他方法参数

var dict = []; // create an empty array

dict.push({
    key:   "keyName",
    value: "the value"
});
// repeat this last part as needed to add more key/value pairs

或者在创建对象后使用常规点符号设置属性：

// empty object literal with properties added afterward
var dict = {};
dict.key1 = "value1";
dict.key2 = "value2";
// etc.

如果您有包含空格的键，特殊字符或类似的东西，您确实需要括号表示法。 例如：

var dict = {};

// this obviously won't work
dict.some invalid key (for multiple reasons) = "value1";

// but this will
dict["some invalid key (for multiple reasons)"] = "value1";

如果您的键是动态的，您还需要括号表示法：

dict[firstName + " " + lastName] = "some value";

请注意，键（属性名称）始终是字符串，非字符串值在用作键时将强制转换为字符串。