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SSL Error When installing rubygems, Unable to pull data from 'https://rubygems.org/
...ing to do the Michael Hartl tutorial. When I attempt to install rails 3.2.14 in my gemset, I get the following issue:
24 A...
How to define a two-dimensional array?
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1039
You're technically trying to index an uninitialized array. You have to first initialize the o...
Configure Log4net to write to multiple files
...s to your logger. For example:
<log4net>
<appender name="File1Appender" type="log4net.Appender.FileAppender">
<file value="log-file-1.txt" />
<appendToFile value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversi...
Calculate a Running Total in SQL Server
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15 Answers
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MySQL INNER JOIN select only one row from second table
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10 Answers
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Meaning of -
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129
To understand the "encoding" attribute, you have to understand the difference between bytes an...
What's with 181783497276652981 and 8682522807148012 in Random (Java 7)?
Why were 181783497276652981 and 8682522807148012 chosen in Random.java ?
3 Answers
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Build vs new in Rails 3
...enrym:~/testapp$ rails c
Loading development environment (Rails 3.0.4)
r:001 > (some_firm = Firm.new).save # Create and save a new Firm
#=> true
r:002 > some_firm.clients # No clients yet
#=> []
r:003 > some_firm.clients.new # Create a new client
#=> #<Client i...
快速理解 高频对冲套利自动交易（程式化交易） - 更多技术 - 清泛网 - 专注...
...、程序化交易等等的误解与混乱，特开贴探讨。破题篇：1、何谓：高频？T+0制度下，反反复复做同样一件...有感于，目前中国期货界，对于量化投资、程序化交易等等的误解与混乱，特开贴探讨。
破题篇：
1、何谓：高频...