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How to get the original value of an attribute in Rails
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E.g.: for self.context: self.context_was
– Freedom_Ben
Dec 9 '14 at 23:00
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System.Timers.Timer vs System.Threading.Timer
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This article offers a fairly comprehensive explanation:
"Comparing the Timer Classes in the .NET Framework Class Library" - also available as a .chm file
The specific difference appears to be that System.Timers.Timer is geared towards multithreaded applications and i...
Should I impose a maximum length on passwords?
... length is to prevent easy to guess passwords. There is no purpose for a maximum length.
The obligatory XKCD explaining why you're doing your user a disservice if you impose a max length:
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In JPA 2, using a CriteriaQuery, how to count results
...teQuery(cq).getSingleResult();
Obviously you will want to build up your expression with whatever restrictions and groupings etc you skipped in the example.
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How to make an ImageView with rounded corners?
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Javascript event handler with parameters
...ers. The problem is that the function doesn't get the element. Here is an example:
7 Answers
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How to write one new line in Bitbucket markdown?
...wish they'd also implement the backslash solution.
– x-yuri
Jun 8 at 10:59
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通过 ulimit 改善系统性能 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...这些问题时，经常使用的一种简单手段。ulimit 是一种 linux 系统的内键功能，它具有一套参数集，用于为由它生成的 shell 进程及其子进程的资源使用设置限制。本文将在后面的章节中详细说明 ulimit 的功能，使用以及它的影响，...
How to check if a value exists in an array in Ruby
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Alternate syntax: %w(Cat Dog Bird).include? 'Dog'
– scarver2
Dec 18 '12 at 22:04
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How do you get centered content using Twitter Bootstrap?
I'm trying to follow a very basic example. Using the starter page and the grid system , I was hoping the following:
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