create function sslr(@num numeric(20,10),@i int) --@i保留的小数位 --@num传入的数据 returns varchar(20) as begin declare @numtemp numeric(20,10),@result varchar(20) set @numtemp=abs(@num)*power(10,@i+1) select @numtemp=(case when floor(@
var Stack = (function(){ var items = new WeakMap(); //先入后出,后入先出 class Stack{ constructor(){ items.set(this,[]); } push(ele){ //入栈 var ls = items.get(this); ls.push(ele); } pop(){ //出栈 var ls = items.get(this); return ls.pop(); } size(){ //获取栈的长度 var