Created by Jerry Wang, last modified on Sep 11, 2014
原创
2022-04-21 17:28:49
195阅读
Created by Jerry Wang, last modified on Sep 11, 2014
原创
2021-07-15 15:45:16
53阅读
#!/usr/bin/python#*coding:utf-8*names=['jack','tom','sherry']forlinnames:print(l)forxinrange(10):print(x
原创
2018-01-16 14:17:53
440阅读
union和union all区别UNION会把两个查询语句的结果集合并起来。union会过滤掉两个
原创
2022-07-08 11:10:22
125阅读
Just as in mathematics, you can eliminate parentheses from SQL expressions. The following two querent:select * from employees where NOT (ename = 'BLAKE' AND init = 'R')sel
原创
2023-05-24 14:16:57
71阅读
union和union all区别 UNION会把两个查询语句的结果集合并起来。union会过滤掉两个结果集中重复的行，而union all不会过滤掉重复行。 union / order by 在union两个带order的select的时候，会报错。 ERROR 1221 (HY000): Inc
转载
2021-05-30 11:23:15
462阅读
题意$K(1 \le K \le 10^9)$堆石子，每堆石子个数不超过$L(2 \le 50000)$，问Nim游戏中先手必败局面的数量，答案对$10^9+7$取模。 分析容易得到$f(i, k) = \sum_{j=0}^{n 1} f(i 1, j) f(i 1, k^j), f(1, i(...
原创
2021-08-11 10:24:20
124阅读
1 class Solution {
2 public int change(int amount, int[] coins) {
3 if (amount == 0) {
4 return 1;
5 }
6 if(coins == null || coins.length == 0){
7
转载
2019-06-12 07:45:00
19阅读
The DBA has chosen to manage SGA and PGA memory separately in an OLTP database because of his unique knowledge of the application. Which of these are
转载
2017-11-06 23:32:00
509阅读
2评论
#!/usr/bin/python#*coding:utf-8*age=int(input("inputyourage:"))ifage>=50:print('old')elifage>=25:print('adult')elifage>=6:print('teenager')else:print('ki
原创
2018-01-16 14:04:35
372阅读
Q.How do I open and edit multiple files under VIM text editor running
under Ubuntu Linux / UNIX operating systems to improve my productivity?A. Vim offers multiple file
editing with the help of window
转载
精选
2014-08-28 12:16:18
1032阅读
EventBus is a publish/subscribe event bus optimized for Android.so make it simple,just think EventBus as a framework that allow different compoents to communicate,usually a subscribe register a certai
原创
2016-09-22 01:09:58
1099阅读
修改文件内容sed -i '/pattern/s/old/new/g' <file> #先筛选出满足pattern的字符串, 然后将该字符串钟的old替换为new修改多个文件名for file in *.c # 列出需要修改文件名的文件
do
nfile=`echo $file | sed 's/file/ma/g'`
mv $file $nfile
don
转载
2021-03-15 22:47:55
176阅读
2评论
dnsjava usage
转载
2019-02-02 16:48:00
666阅读
2评论
dpkg -i package.deb安装包dpkg -r package删除包dpkg -P package删除包（包括配置文件）dpkg -L package列出与该包关联的文件dpkg -l package显示该包的版本dpkg –unpack package.deb解开 deb 包的内容dpkg -S keyword搜索所属的包内容dpkg -l列出当前已安装的包dpkg -c...
转载
2009-12-20 22:21:00
134阅读
2评论
ScheduledThreadPoolExecutor Usage
转载
2019-03-18 11:03:00
145阅读
2评论
RxPermissions Usage
转载
2019-03-14 18:05:00
212阅读
2评论
1 使用kthread_create创建线程： struct task_struct *kthread_create(int (*threadfn)(void *data),
原创
2023-06-19 09:50:05
88阅读
impdb loads the dmp file from ORACLE_HOME/admin/ORACLE_SID/dpdump/test.dump, so before we run impdb, we put it into this folder.
oracle@laptop-ubuntu:/opt/oracle/admin/orcl/dpdump$ impdp sy
原创
2009-08-31 17:55:39
875阅读
#!/bin/bashread-p"pleaseinputanumber:"acase"$a"in1)echo"Thenumis1";;2)echo"Thenumis2";;[3-9])echo"Thenumis$a";;*)echo"pleaseinput[0-9]int"ex
原创
2018-01-22 11:54:07
503阅读
