我希望函數能夠生成隨機字符串而不重複。 例如這個功能也許會打印：ABCC func randomString(length:Int) -> String {
let charSet = "ABCDEF"
var c = charSet.characters.map { String($0) }
var s:String = ""
for _ in (1...length) {
s
Select BillName as A, ConsigneeName as B, ShipperName as C
from Sum_Orders
where (OrderStatus in ('Complete','Invoiced')
)
and
OrderPeriodYear IN (
(
YEA
我使用組合框從MySQL數據庫檢索數據。但是，當我插入第一個值設置爲數據庫，組合框值重複。我想知道它爲什麼會發生，以及如何避免它。我主要調用了這個方法。由於 public void FillCombo(){
try{
String sql = "Select Name from Employee where Position='Driver'";
pst
首先，這裏的代碼： using UnityEngine;
using System.Collections;
namespace UltimateSurvival
{
public class Radiation : MonoBehaviour
{
public GameObject radiationEffect;
public EntityVitals
我想創建一個大小爲50的數組，其大小爲0到20之間的隨機數，然後提取在該數組中重複的數字到另一個數組中。 Sub Problem10()
Dim numbers() As Double, odd() As Double, even() As Double, five() As Double, repeating() As Double, x As Integer, i As Integer, s