本文實例講述了JavaScript獲得指定對象大小的方法。分享給大家供大家參考。具體如下：
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1 2 3 4 5 6 7 8 9 10 11 function objectSize(the_object) { /* function to validate the existence of each key in the object to get the number of valid keys. */ var object_size = 0; for (key in the_object){ if (the_object.hasOwnProperty(key)) { object_size++; } } return object_size; }用法如下：
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1 2 3 4 5 6 7 // Arbitrary object var something = { dog: "cat", cat: "dog" } console.log(objectSize(something)); // Logs: 2希望本文所述對大家的javascript程序設計有所幫助。