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Float vs Decimal in ActiveRecord

...Float. It's like a scientific notation for binary (something like +1.43*10^2). Because of that, it is impossible to store fractions and decimals in Float exactly. That's why there is a Decimal format. If you do this: irb:001:0> "%.47f" % (1.0/10) => "0.10000000000000000555111512312578270211...
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regex.test V.S. string.match to know if a string matches a regular expression

... Michał Perłakowski 63.1k2121 gold badges133133 silver badges148148 bronze badges answered Jun 7 '12 at 21:26 gdoron is suppor...
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Is there a way to take a screenshot using Java and save it to some sort of image?

... | edited Apr 22 '10 at 22:12 jjnguy 125k4949 gold badges283283 silver badges319319 bronze badges ...
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How do I encode/decode HTML entities in Ruby?

...urana; sudo gem install htmlentities Successfully installed htmlentities-4.2.4 : jmglov@laurana; irb irb(main):001:0> require 'htmlentities' => [] irb(main):002:0> HTMLEntities.new.decode "¡I'm highly annoyed with character references!" => "¡I'm highly annoy...
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Override body style for content in an iframe

... | edited Feb 22 '18 at 5:15 Louis 3,83033 gold badges3434 silver badges5151 bronze badges a...
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C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术

...herhill/article/details/18716559 http://www.cnblogs.com/xianyunhe/archive/2011/09/25/2190485.html http://blog.sina.com.cn/s/blog_6e51df7f01015cci.html 感谢原作者的无私奉献。 通过VC实现对Excel表格的操作的方法有多种,如:通过ODBC数据库实现,通过解析Excel...
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When to use nested classes and classes nested in modules?

... | edited May 2 '18 at 19:45 Soviut 75.7k4040 gold badges160160 silver badges224224 bronze badges ...
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How can I reverse the order of lines in a file?

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AngularJS For Loop with Numbers & Ranges

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