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[英]JS How can I check if an object has attributes no included in an interface?
[英]How can I know all the attributes a javascript object has?
是否有类似Java反射的东西可以让我知道可用的属性?
for(var key in myObject) {
//do something with key
}
通过所有属性枚举
window
对象http://jsfiddle.net/KdyLG/的所有属性
这是我使用的一项功能。 您可以指定要转储的阵列级别。
alert(dump(myArray));
function dump(arr,level) {
var dumped_text = "";
if(!level) level = 0;
//The padding given at the beginning of the line.
var level_padding = "";
for(var j=0;j<level+1;j++) level_padding += " ";
if(typeof(arr) == 'object') { //Array/Hashes/Objects
for(var item in arr) {
var value = arr[item];
if(typeof(value) == 'object') { //If it is an array,
dumped_text += level_padding + "'" + item + "' ...\n";
dumped_text += dump(value,level+1);
} else {
dumped_text += level_padding + "'" + item + "' => \"" + value + "\"\n";
}
}
} else { //Stings/Chars/Numbers etc.
dumped_text = "===>"+arr+"<===("+typeof(arr)+")";
}
return dumped_text;
}
一种方法:
for(var attrib in myObject){
if(typeof attrib != 'function') {
alert('this is attribute ' + attrib + 'with value' + myObject[attrib]);
} }
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