把数组对象[{key1:val1},{key2:val2}] 的key val 分割成独立的数组

var arr = [{key1:val1},{key2:val2}] var keyArr = []var valArr = []arr.forEach(function(va,i){    for ( var key in va ) {      keyArr .push(key)      valArr .push(va[key])    }});console.log(keyArr,valArr)

[key1,key2],[val1,val2]