如下，我們來定義Week的枚舉：
var WeekDay = {};
WeekDay.Sunday = 0;
WeekDay.Monday = 1;
WeekDay.Tuesday = 2;
WeekDay.Wedesay = 3;
WeekDay.Thursday = 4;
WeekDay.Friday = 5;
WeekDay.Saturday = 6;
}
當然，我們有更為直觀的方式。以定義DOM文檔節點類型為例，定義方式如下：
var Node = {
ELEMENT_NODE: 1,
ATTRIBUTE_NODE: 2,
TEXT_NODE: 3,
CDATA_SECTION_NODE: 4,
ENTITY_REFERENCE_NODE: 5,
ENTITY_NODE: 6,
PROCESSING_INSTRUCTION_NODE: 7,
COMMENT_NODE: 8,
DOCUMENT_NODE: 9,
DOCUMENT_TYPE_NODE: 10,
DOCUMENT_FRAGEMENT_NODE: 11,
NOTATION_NODE: 12
}
}
與類C語言類似，以上2個例子的枚舉對應屬性值均為整形。你可能想到，難道還能定義成別的類型？要回答這個問題，得先知道咱們這個枚舉實現的原理。前面說到，這里是用JSON來實現的，而JSON可以使用任何類型的值！所以，Js中的枚舉可以是任何類型的值。以下以String類型為例：
var Color = {
Color1: 'red',
Color2: 'green',
Color3: 'white',
Color4: 'black'
}
}
以更為復雜的類型來定義一個PersonList枚舉如下：
var PersonList = {
ZhangSan: {
Id: 1,
Name: 'ZhangSan',
Gender: 'man'
},
LiSi: {
Id: 2,
Name: 'LiSi',
Gender: 'woman'
},
ZhaoWu: {
Id: 3,
Name: 'ZhaoWu',
Gender: 'man'
}
}
}
新聞熱點
疑難解答
