如何把对象里的数组取出来合成一个新数组？
var obj = {
"1":[{"tempId":"1589851345842","type":"2","typeQt":"","name":"王桂","idcard":"","zhengzmm_fam":"11","work":"务农","state":"1","LAY_TABLE_INDEX":"0"}],
"2":[{"tempId":"1589851631886","type":"","typeQt":"","name":"","idcard":"","zhengzmm_fam":"","work":"","state":"1","LAY_TABLE_INDEX":"0"}],
"3":[{"tempId":"1591255391330","type":"24","typeQt":"女婿","name":"张三","idcard":"1111","zhengzmm_fam":"1","work":"问责方式","state":"1","LAY_TABLE_INDEX":"0"},{"tempId":"1592448703640","type":"1","typeQt":"","name":"1111","idcard":"333","zhengzmm_fam":"","work":"","LAY_TABLE_INDEX":"1"}]
};
一：兼容性好，支持es6的话
var arr = [];
for(var i in obj){
arr.push(...obj[i]);//es6的扩展运算符（...）它主要是将一个数组转为用逗号分隔的参数序列
}
console.log(arr);
二：合理的利用ES2015特性会很简单
let arr = Object.values(obj).reduce((a,b)=> a.concat(b));
console.log(arr);
三：js解决
（1）双重循环
var arr = [];
for(var i in obj){
for(var j in obj[i]){
arr.push(obj[i][j]);
}
}
console.log(arr);
（2）concat方法
concat() 方法用于连接两个或多个数组。
该方法不会改变现有的数组，而仅仅会返回被连接数组的一个副本。
var arr = [];
for(var i in obj){
arr = arr.concat(obj[i]);
}
console.log(arr);
希望对你有帮助！
