我发现这个有效的解决方案
private int[] winningPatterns = { 0b111000000, 0b000111000, 0b000000111, // rows
0b100100100, 0b010010010, 0b001001001, // cols
0b100010001, 0b001010100 // diagonals
};
/** Returns true if thePlayer wins */
private boolean hasWon(int thePlayer) {
int pattern = 0b000000000; // 9-bit pattern for the 9 cells
for (int row = 0; row < 3; ++row) {
for (int col = 0; col < 3; ++col) {
if (cells[row][col].content == thePlayer) {
pattern |= (1 << (row * 3 + col));
}
} …输入:
public static void main(String[] args) {
final String key = "some key";
final String value = "some value";
Map<String, String> map1 = new HashMap<String, String>(){{put(key, value);}};
System.out.println(new Gson().toJson(map1) + " " + map1.get(key));
Map<String, String> map2 = new HashMap<>();
map2.put(key, value);
System.out.println(new Gson().toJson(map2) + " " + map2.get(key));
}
输出:
null some value
{"some key":"some value"} some value
Process finished with exit code 0
我创建了这个返回连接对象的类.我用过MySQL数据库.
public class Connect_db {
public Connection getConnection(String db_name,String user_name,String password)
{
Connection con=null;
try
{
Class.forName("com.mysql.jdbc.Driver");
con=DriverManager.getConnection("jdbc:mysql://localhost/"+db_name+"?user="+user_name+"&password="+password);
}
catch(Exception e)
{
e.printStackTrace();
}
return con;
}
}
现在我想做的就是实例化这个类一次并得到连接对象.我想在整个应用程序中使用同一个对象.另一个解决方案也将受到赞赏.
出于某种原因,当使用虚线边框样式制作线条时,Chrome会将结尾呈现为双点,这看起来很糟糕,特别是在短线上:
.text {
border-bottom: 2px dotted #000;
}<span class="text">Hi</span><br/>
<span class="text">lll</span><br/>
<span class="text">22</span><br/>即使是简单的事情border-bottom: 2px dotted #000;也无效.我看到一些文章建议将左/右边框设置为透明,但看起来更糟糕的是它切掉了点的小角落.
不过,它在Firefox中看起来很好.有没有办法让它在Chrome中看起来不错,或者我运气不好？
MSDN - “ShellProc功能”，“RegisterShellHookWindow功能”：
HSHELL_WINDOWCREATED => A top-level, unowned window has been created.
HSHELL_WINDOWDESTROYED => A top-level, unowned window is about to be destroyed.
但：
当仅对任何顶级无主窗口（带有任务栏按钮）进行隐藏/显示（或设置/取消）时，我们也会得到HSHELL_WINDOWDESTROYED/ 。为什么？任务栏按钮不是“真正的”窗口，不是吗？HSHELL_WINDOWCREATEDWS_EX_TOOLWINDOW
这个问题主要针对MS内部人士。
我有一个带小数(16,2)字段的mysql表.看起来像使用另一个十进制(16,2)字段字符串的加法操作可能会导致Data truncated for column x at row 1问题,这会在我的django项目中引发异常.
我知道该字段的乘法或除法运算会导致此问题,因为结果可能不适合十进制(16,2)定义,但加法和减法操作是否相同？
我的MySQL服务器版本是5.5.37-0ubuntu0.14.04.1.您可以从下面重现此问题:
mysql> drop database test;
Query OK, 1 row affected (0.10 sec)
mysql> create database test;
Query OK, 1 row affected (0.00 sec)
mysql> use test;
Database changed
mysql> create table t(price decimal(16,2));
Query OK, 0 rows affected (0.16 sec)
mysql> insert into t values('2004.74');
Query OK, 1 row affected (0.03 sec)
mysql> select * from t;
+---------+
| price |
+---------+
| 2004.74 |
+---------+
1 …我有这个C代码:
int a = 5;
printf("a is of value %d before first if statement. \n", a);
if (a = 0) {
printf("a=0 is true. \n");
}
else{
printf("a=0 is not true. \n");
}
printf("a is of value %d after first if statement. \n", a);
if (a == 0){
printf("a==0 is true. \n");
}
else{
printf("a==0 is not true. \n");
}
return 0;
}
输出:
a is of value 5 before first if statement.
a=0 is not true.
a is of …例如
String temp = "welcome,to,the,world,of,j2ee";
将其转换为arraylist
ArrayList al= new ArrayList(temp.split(","));
这是作为arraylist的内容 {"welcome","to","the","world","j2ee"}
我的要求是在每个字符串的末尾添加"^ d"
对于前 {"welcome^d","to^d","the^d","world^d","j2ee^d"}
当我写查询时:
SELECT DISTINCT City FROM Customers;
它返回Customers表中的所有不同城市.
但是当我写下查询时:
SELECT DISTINCT City,* FROM Customers;
它返回Customers表中的所有行(首先是城市列,后面是所有列,包括city).
即使我们使用不同的关键字,显示所有记录的原因是什么？
我在godaddy中拥有域，并且我试图在专用服务器中安装脚本或尝试访问我的域righttimematrimony.com，但该域未加载并显示错误。一次，我的网站加载并显示sci-bin文件夹，将数据上传到服务器并尝试访问我的网址后，但显示了很多错误。请有人帮助我现在该怎么办。
这是在Cpanel->错误日志中的错误日志中的数据。
[Mon Dec 29 04:14:23 2014] [alert] [client 106.66.138.199] /home/right/public_html/.htaccess: Invalid command 'php_flag', perhaps misspelled or defined by a module not included in the server configuration
[Mon Dec 29 04:14:23 2014] [alert] [client 106.66.138.199] /home/right/public_html/.htaccess: Invalid command 'php_flag', perhaps misspelled or defined by a module not included in the server configuration
[Mon Dec 29 04:14:05 2014] [alert] [client 106.66.138.199] /home/right/public_html/.htaccess: Invalid command 'php_flag', perhaps misspelled or defined by a module not included in the server configuration
[Mon Dec 29 …提出的问题是:"考虑下一个问题,创建一个计算2个月内能源消耗的问题:
我写了这个程序,当我运行它并添加浪费和小时的值时,无论我输入哪个值,费用都会给我0.00.
#include <stdio.h>
#include <math.h>
int main()
{
int c; //energy waste//
float p, h; // p=fee h=hours//
printf("Introduce el consumo y el numero de horas:");
scanf("%d %f ", &c, &h);
if (c<1000) {
p=h*1.2;
}
if ((c=1000) && (c<1851)) {
p=h*1.2;
}
if (c>1850) {
p=h*0.9;
}
printf("Fee: %f", p);
return 0;
}
我需要收取费用.我希望它写得很好,因为我讲西班牙语并且不熟悉英语中的编程概念.
Dim a, b, c As Integer
a = 10
b = 3
c = a And b
MessageBox.Show(c)
结果c = 2怎么来的？
在我的第二个if/else语句中有一个小故障,我想,你能帮我找到它吗？曾经的单词== 1单词的值应该改为"瓶子",但它正在打印"瓶子".
public class milkSong
{
public static void main(String[] args) {
int milkNum = 10; //decreased the bottles of milk so that the output would fit
String word = "bottles";
while (milkNum > 0) {
if (milkNum == 1) {
word = "bottle";
}
System.out.println (milkNum + " " + word + " of milk on the wall.");
System.out.println (milkNum + " " + word + " of milk.");
System.out.println ("Take one down.");
System.out.println ("Pass it around.");
milkNum = …