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The 'json' native gem requires installed build tools
I have ruby 1.9.2p180 (2011-02-18) [i386-mingw32] installed on my windows 7 machine. Now I tried to install the JSON gem using the command, "gem install json" and got the following error.
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pdf2htmlEX实现pdf转html - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...html和pdf视图下的截图：
windows下载地址：pdf2htmlEX-v1.0-win32-static
本人开发的一个功能：文档在线阅读，要求能够支持移动终端浏览器在线阅读。考虑过将文档先转pdf，然后在将pdf转swf，利用flexpaper在前端浏览器访问。但是...
How to read data when some numbers contain commas as thousand separator?
... values are expressed as strings with commas as thousand separator, e.g. "1,513" instead of 1513 . What is the simplest way to read the data into R?
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Get the previous month's first and last day dates in c#
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10 Answers
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How to sort an array by a date property
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17 Answers
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Is there a builtin identity function in python?
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100
Doing some more research, there is none, a feature was asked in issue 1673203 And from Raymond...
Generate unique random numbers between 1 and 100
How can I generate some unique random numbers between 1 and 100 using JavaScript?
29 Answers
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Code for Greatest Common Divisor in Python [closed]
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edited May 9 '19 at 22:14
answered Jun 24 '12 at 5:19
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MQTT物联网协议完全实践指南 · App Inventor 2 中文网
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MQTT协议深度解析
1. 协议架构与通信模式
2. 消息质量等级（QoS）详解
3. 主题设计与最佳实践
完整实战项目：智能温室控制系统
项目概述
系统架构设计
1. ...
Length of generator output [duplicate]
...ou have a lazy infinite generator? For example:
def fib():
a, b = 0, 1
while True:
a, b = b, a + b
yield a
This never terminates but will generate the Fibonacci numbers. You can get as many Fibonacci numbers as you want by calling next().
If you really need to know the ...