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从估值5千万到一无所有 90后的他感觉梦境一场 - 资讯 - 清泛网 - 专注C/C++...
...1000万元天使轮融资之后，夏军写了两篇文章，《94年大叔如何撬动900亿宠物市场》和《刚毕业，我是如何拿到千万投资》。他突然意识到，自己很有可能成为余佳文、温城辉之后的又一个90后创业代表。光从年龄看，他甚至比后...
SQLAlchemy IN clause
...is using raw SQL mode with SQLAlchemy, I use SQLAlchemy 0.9.8, python 2.7, MySQL 5.X, and MySQL-Python as connector, in this case, a tuple is needed. My code listed below:
id_list = [1, 2, 3, 4, 5] # in most case we have an integer list or set
s = text('SELECT id, content FROM myTable WHERE id IN :...
SQL - using alias in Group By
...OUP BY is executed before the SELECT clause.
There are exceptions though: MySQL and Postgres seem to have additional smartness that allows it.
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How to implement a binary tree?
...one
self.v = val
class Tree:
def __init__(self):
self.root = None
def getRoot(self):
return self.root
def add(self, val):
if self.root is None:
self.root = Node(val)
else:
self._add(val, self.root)
def _add(self, val...
Get Root Directory Path of a PHP project
...
this is just awesome, I tried $_SERVER['DOCUMENT_ROOT'], dirname(), $_SERVER['SCRIPT_NAME'] etc. but this worked excellently!
– webblover
Nov 26 '14 at 16:40
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使用Activity启动器组件 · App Inventor 2 中文网
...频
选择联系人
启动其他外部应用程序
了解如何设置 ActivityStarter 属性
在应用程序之间传递值
将活动启动器与两个 App Inventor 应用程序一起使用
该应用程序在设备上可用吗？
附录：为设计...
使用NPAPI编写浏览器插件的源码实例(windows 7/linux) - C/C++ - 清泛网 - ...
...39/showart_2004756.html
[4] https://developer.mozilla.org/en/Plugins
[5] 如何在chrome的扩展中使用:http://code.google.com/chrome/extensions/npapi.html
[6] 如何编写chrome的扩展:http://code.google.com/chrome/extensions/getstarted.html
插件的功能
提供网页的javascript可...
领域驱动设计系列 (四)：事件驱动下 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...;
}
所以我们只需在代码里RaiseEvent就可以了。
那么如何订阅事件
其实很简单，因为我们要实现的是同步的事件，我们只需要找到所有处理这个事件的实现类，然后调用所有就可以了。
public interface IEventHandler<TEvent> where ...
Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
...tive.
Is DDL transactional according to this document?
PostgreSQL - yes
MySQL - no; DDL causes an implicit commit
Oracle Database 11g Release 2 and above - by default, no, but an alternative called edition-based redefinition exists
Older versions of Oracle - no; DDL causes an implicit commit
SQL ...
How do you run your own code alongside Tkinter's event loop?
...
Use the after method on the Tk object:
from tkinter import *
root = Tk()
def task():
print("hello")
root.after(2000, task) # reschedule event in 2 seconds
root.after(2000, task)
root.mainloop()
Here's the declaration and documentation for the after method:
def after(self,...