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How to get a random number in Ruby

...ust need a random float, just call rand with no arguments. As Marc-André Lafortune mentions in his answer below (go upvote it), Ruby 1.9.2 has its own Random class (that Marc-André himself helped to debug, hence the 1.9.2 target for that feature). For instance, in this game where you need to ...
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Convert a String representation of a Dictionary to a dictionary?

How can I convert the str representation of a dict , such as the following string, into a dict ? 9 Answers ...
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C# 4.0: Can I use a TimeSpan as an optional parameter with a default value?

...efaultTimespan) and public Foo(Timespan ts) – johan mårtensson Nov 3 '17 at 11:39 add a comm...
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Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k

...omial (x-a1)...(x-ak) the coefficients will be exactly c1, ..., ck - see Viète's formulas. Since every polynomial factors uniquely (ring of polynomials is an Euclidean domain), this means ai are uniquely determined, up to permutation. This ends a proof that remembering powers is enough to recover ...
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CDN(内容分发网络)技术原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...内容访问量,减轻服务器的压力,提升了网站的性能和可扩展性。 与目前现有的内容发布模式相比较,CDN强调了网络在内容发布中的重要性。通过引入主动的内容管理层的和全局负载均衡,CDN从根本上区别于传统的内容发布模...
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Why does !{}[true] evaluate to true in JavaScript?

... answered Oct 31 '13 at 9:43 Frédéric HamidiFrédéric Hamidi 232k3737 gold badges445445 silver badges455455 bronze badges ...
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转型产品经理必看 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...当接到一个需求的时候,首先是从现有工程架构的角度和扩展角度去考虑,一个需求或者一个功能的实现与否第一考虑要素是对现有系统的兼容性以及扩展难易程度。这是一种很正常的思维,因为我也是这样。但从另一个角度考...
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Last segment of URL in jquery

... answered Jan 21 '11 at 11:18 Frédéric HamidiFrédéric Hamidi 232k3737 gold badges445445 silver badges455455 bronze badges ...
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How do I get the n-th level parent of an element in jQuery?

... answered Aug 17 '11 at 13:37 Frédéric HamidiFrédéric Hamidi 232k3737 gold badges445445 silver badges455455 bronze badges ...
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Can HTML checkboxes be set to readonly?

...data posted, your example does not do that. – David Mårtensson Feb 8 '12 at 16:59 71 ...