javascript

2023-05-06 04:47| 来源: 网络整理| 查看: 265

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。

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