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What does the (unary) * operator do in this Ruby code?
...th several arguments creates them as key value pairs:
Hash["a", 100, "b", 200] #=> {"a"=>100, "b"=>200}
So in your example this would lead to the following Hash:
{"first_name"=>"mickey", "last_name"=>"mouse", "county"=>"usa"}
...
“媒”出路？如今“媒体+行业”创业机会多得是 - 资讯 - 清泛网 - 专注C/C+...
...媒体价值的变现。“互联网+”的概念之所以如此盛行，不仅仅因为它是龙头企业大佬抛的概念，或是国家最高层面的领导捧场站台。其核心本质是因为互联网做为一个独立行业，自身的革新变化已经完成，此时，其做为基本工...
Why do we need a pure virtual destructor in C++?
...al destructor. But why do we need a pure virtual destructor? In one of the C++ articles, the author has mentioned that we use pure virtual destructor when we want to make a class abstract.
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Should I use #define, enum or const?
In a C++ project I'm working on, I have a flag kind of value which can have four values. Those four flags can be combined. Flags describe the records in database and can be:
...
Changing the color of the axis, ticks and labels for a plot in matplotlib
...alues1=[1,2,3,4,5]
y_values1=[1,2,2,4,1]
x_values2=[-1000,-800,-600,-400,-200]
y_values2=[10,20,39,40,50]
x_values3=[150,200,250,300,350]
y_values3=[-10,-20,-30,-40,-50]
fig=plt.figure()
ax=fig.add_subplot(111, label="1")
ax2=fig.add_subplot(111, label="2", frame_on=False)
ax3=fig.add_subplot(11...
Guaranteed lifetime of temporary in C++?
Does C++ provide a guarantee for the lifetime of a temporary variable that is created within a function call but not used as a parameter? Here's an example class:
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Is #pragma once a safe include guard?
...
Should make it into C++20.
– Ionoclast Brigham
Sep 2 '17 at 4:22
1
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奇葩职位为何频现互联网？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...以往害怕“挨骂”的企业则纷纷主动“找骂”，这种转变不能不让业界惊叹：行业的口碑竞争时代难道已经来“游山玩水，不爽就骂，费用报销，年薪百万。我们会签正式合同，绝不是临时工！”同程旅游创始人、CEO吴志祥前日...
浅谈Heatmap：网页热点图生成原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...红外成像
唠叨了半天，听上去似乎有点跑题了，其实不然，对互联网从业者而言，同样需要有火眼金睛，以便识别网友的喜好，此时的衡量标准是点击，点击越多则表示越喜欢，此技术被称作Heatmap，已经有网站提供此类服务...
Can I call a base class's virtual function if I'm overriding it?
...
The C++ syntax is like this:
class Bar : public Foo {
// ...
void printStuff() {
Foo::printStuff(); // calls base class' function
}
};
share...