我有一个JavaScript对象,比如
var obj = {
key1: 'value1',
key2: 'value2',
key3: 'value3',
key4: 'value4'
}
如何获取该对象中的键的长度和列表?
我有一个JavaScript对象,比如
var obj = {
key1: 'value1',
key2: 'value2',
key3: 'value3',
key4: 'value4'
}
如何获取该对象中的键的长度和列表?
var obj = {
key1: 'value1',
key2: 'value2',
key3: 'value3',
key4: 'value4'
};
var keys = [];
for (var k in obj) keys.push(k);
console.log("total " + keys.length + " keys: " + keys);