object.hasOwnProperty()判断object属性是否存在。
如一个object如下:-
<code>
myDog = {
"name":"Labby",
"tail":1,
"color":"black"
}
myDog.hasOwnProperty("name")//true
myDog.hasOwnProperty("friends")//false
</code>
Just want to spend this life happier.
object.hasOwnProperty()判断object属性是否存在。
如一个object如下:-
<code>
myDog = {
"name":"Labby",
"tail":1,
"color":"black"
}
myDog.hasOwnProperty("name")//true
myDog.hasOwnProperty("friends")//false
</code>
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