依然任逍遥
- 浏览: 175377 次
- 性别:
- 来自: 苏州
-
文章列表
0. Object and Value
>>> a = 'banana'
>>> b = 'banana'
>>> a is b
True
In this example, Python only created one string object, and both a and b refer to it.
>>> a = [1, 2, 3]
>>> b = [1, 2, 3]
>>> a is b
False
In this case w ...
The most commonly used git commands are:
add //add Add file contents to the index
bisect //bisect Find the change that introduced a bug by binary search
branch //branch List, create, or delete branches
checkout //checkout Checkout and switch to a branch
clone //clone Clone a repository into a n ...
模块
编写稍大一点的程序时一般都会将代码模块化。在NodeJS中，一般将代码合理拆分到不同的JS文件中，每一个文件就是一个模块，而文件路径就是模块名。
在编写每个模块时，都有require、exports、module三个预先定义好的变量可供使用。
require
require函数用于在当前模块中加载和使用别的模块，传入一个模块名，返回一个模块导出对象。
var foo1 = require('./foo');
var foo2 = require('./foo.js');
var foo3 = require('/home/user/foo');
var f ...
package com.test.mybatis;
import java.io.File;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator. ...
mail局域网Exchange服务器测试代码，仅限发送到domain内用户，发送外网需要exchange设置白名单，ref:
解决方案：
Exchange 2003:
Open the Exchange System Manager
Go in Administrative Groups -> Administrative group name -> Server -> Server name -> Protocols -> SMTP
Right click on Default SMTP Virtual Server -> properties
...
sdk位置没问题，突然启动后就识别不了sdk了，尝试删除eclipse的adt配置重启eclipse后再次配置android sdk location问题解决。
删除eclipse的workspace\.metadata\.plugins\org.eclipse.core.runtime\com.android.ide.eclipse.adt.prefs 、 com.android.ide.eclipse.ddms.prefs
#com.android.ide.eclipse.adt.prefs
com.android.ide.eclipse.adt.attrSort=logical
...
https://developers.google.com/chart/interactive/docs/quick_start
<html>
<head>
<!--Load the AJAX API-->
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
...
win+R->CMD->
ipconfig /flushdns
ipconfig /displaydns
C:\windows\system32\drivers\etc\hosts
64.233.166.106 www.google.com
#http://209.116.186.231/
Java Concurrency / Multithreading Tutorial
并发编程网
Table of Contents
The Java synchronized Keyword
Synchronized Instance Methods
Synchronized Static Methods
Synchronized Blocks in Instance Methods
Synchronized Blocks in Static Methods
Java Synchronized Example
Java Concurrency Utilities
A Java synchro ...
jdk1.6升级到1.7后Comparator有null的参数就会抛出如下异常
java.lang.IllegalArgumentException: Comparison method violates its general contract!
at java.util.TimSort.mergeLo(TimSort.java:747)
at java.util.TimSort.mergeAt(TimSort.java:483)
at java.util.TimSort.mergeCollapse(TimSort.java:410)
at java.util.TimSort.so ...
java.lang.IllegalArgumentException: Comparison method violates its general contract!
网上查到一个解释：
Description: The sorting algorithm used by java.util.Arrays.sort and (indirectly) by java.util.Collections.sort has been replaced. The new sort implementation may throw an IllegalArgumentException if it d ...
解决同一台电脑上面多个server需要共享80端口或者域名的问题，Apache的二级域名转发规则没研究明白，于是果断nginx了。
server {
listen 80;
server_name wxpro.orctest.cn;
location /sitefiles/ {
root D:/nginx/html;
}
location / {
proxy_redirect off;
proxy_set_header ...
文件包结构：
icon.png // 插件图标
jquery-1.11.1.min.js //引入jQuery
manifest.json // 主配置文件
myscript.js // 针对页面操作的js
popup.html //弹出框页面
1.manifest.json
{
"name": "NewIssueNotify",
"version": "1.0",
"manifest_version":2,
"description": &quo ...
http://www.2cto.com/kf/201103/84667.html
昨天在公司写了一段代码，很简单，就是测试Thread的dumpStack方法的使用。因为Thread的dumpStack方法不是很常用，但它对于如果想看看谁在运行时调用方法还是非常有帮助的。回到正题，看输出结果：
java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Unknown Source)
at Common.getInfo(TestDumpStack.java:21)
at TestDumpStack.main(TestDump ...
参考 ： How to avoid huge transactions with CMP Entity Beans on JBoss
2014-05-23 11:06:32,475 ERROR [org.jboss.ejb.plugins.LogInterceptor] TransactionRolledbackException in method:
public abstract com.spokesoft.component.sla.SlaDetails com.spokesoft.component.sla.ejb.Sla.getSlaDetails()
throw ...