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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎 ...
...Lite 功能类似，但TaifunSQLite是收费的，美刀。
.aix 拓展下载：
cn.fun123.SQLite.aix
SQLite
SQLite 是 Android 内置的小型、快速、独立的 SQL（结构化查询语言）数据库引擎。
SQL 语句用于创建、选择、更新和删除一个...
vs2008编译boost详细步骤 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
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【二、Boost库的编译】
【Setp1 准备工作】：
（1）Boost 下载可以到官方网站下载：
http://www.boost.org/
（2）安装VS2008 IDE
【Setp2 编译Boost】
1.打开Visual Studio 2008 命令提示窗口
2.进入D:\05_Computer\04_3rdPatry\02Boost\boost_1_44_0\boost...
Getting only 1 decimal place [duplicate]
...ing to represent it with only one digit:
print("{:.1f}".format(number)) # Python3
print "%.1f" % number # Python2
or actually round off the other decimal places?
round(number,1)
or even round strictly down?
math.floor(number*10)/10
...
How to do integer division in javascript (Getting division answer in int not float)? [duplicate]
...
However this emulates the behavior of python3: math.inf // 7 == nan => parseInt(Infinity / 7) == NaN
– jneuendorf
Jan 25 at 2:22
add a ...
Get the first element of each tuple in a list in Python [duplicate]
...nsion you give will only work when the tuples have exactly two entries. In python3, you could do [x for x, *the_rest in rows], where the * really is the special syntax for "the rest of the elements of the tuple". For a list comprehension that will work in python2, use [iter(x).next() for x in rows]
...
How can I create a copy of an object in Python?
...
Shallow copy with copy.copy()
#!/usr/bin/env python3
import copy
class C():
def __init__(self):
self.x = [1]
self.y = [2]
# It copies.
c = C()
d = copy.copy(c)
d.x = [3]
assert c.x == [1]
assert d.x == [3]
# It's shallow.
c = C()
d = copy.copy(c)...
Add a new item to a dictionary in Python [duplicate]
...
@Pakman's comment doesn't work in Python3 (see: stackoverflow.com/questions/13361510/…)
– Prof
Feb 21 '16 at 21:15
...
不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...由软件。最新版本的 Zebra 以及文档可以从 GNU Zebra 网站上下载：http://www.zebra.org/ Zebra ;的设计独特，采用模块的方法来管理协议。可以根据网络需要启用或者禁用协议。
Zebra 最为实用的一点是它的配置形式同 Cisco IOS 极其类似...
搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...p /data/mongodbtest
#进入mongodb文件夹
cd /data/mongodbtest
3、下载mongodb的安装程序包
wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.8.tgz
#解压下载的压缩包
tar xvzf mongodb-linux-x86_64-2.4.8.tgz
4、分别在每台机器建立mongos 、config ...
How to unzip a list of tuples into individual lists? [duplicate]
...
In Python3, this creates a zip object. >>> l = [(1,2), (3,4), (8,9)] >>> zip(*l) <zip at 0x1042d8c48> which can be viewed with a list comprehension >>> [ii for ii in zip(*l)] [(1, 3, 8), (2...