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Elegant way to check for missing packages and install them?
I seem to be sharing a lot of code with coauthors these days. Many of them are novice/intermediate R users and don't realize that they have to install packages they don't already have.
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创业者只需要一种素质：成为某个领域的意见领袖 - 资讯 - 清泛网 - 专注C/C...
...来飞去，毕竟这些都是大家公认的前期投入阶段嘛，下了N年的决心，终于辞职成功，攒了N个月的工资，总不能在关键时刻掉链子吧。的确，“6个月”常常被用来指代创业公司埋头苦干开发产品的那个阶段，要在6个月里坚持不...
How to interactively (visually) resolve conflicts in SourceTree / git
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throwing exceptions out of a destructor
Most people say never throw an exception out of a destructor - doing so results in undefined behavior. Stroustrup makes the point that "the vector destructor explicitly invokes the destructor for every element. This implies that if an element destructor throws, the vector destruction fails... The...
Passing HTML to template using Flask/Jinja2
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Default constructor vs. inline field initialization
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What are the default access modifiers in C#?
...ne sort of exception to this is making one part of a property (usually the setter) more restricted than the declared accessibility of the property itself:
public string Name
{
get { ... }
private set { ... } // This isn't the default, have to do it explicitly
}
This is what the C# 3.0 s...
How do I create a crontab through a script
I need to add a cron job thru a script I run to set up a server. I am currently using Ubuntu. I can use crontab -e but that will open an editor to edit the current crontab. I want to do this programmatically.
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Regular Expression to find a string included between two characters while EXCLUDING the delimiters
I need to extract from a string a set of characters which are included between two delimiters, without returning the delimiters themselves.
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What events does an fire when it's value is changed?
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