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How to update a single library with Composer?
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answered May 24 '13 at 17:40
Nicolai FröhlichNicolai Fröhlich
45.7k1111 gold badges113113 silver badges121121 bronze badges
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Using arrays or std::vectors in C++, what's the performance gap?
...ons on vectors and arrays/pointers.
// Assembly code was generated by gcc 4.1.0 invoked with g++ -O3 -S on a
// x86_64-suse-linux machine.
#include <vector>
struct S
{
int padding;
std::vector<int> v;
int * p;
std::vector<int>::iterator i;
};
int pointer_index (S &a...
How can I fill a div with an image while keeping it proportional?
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}
<div class="fill">
<img src="https://lorempizza.com/320/240" alt="" />
</div>
JSFiddle here
I tested this successfully in IE9, Chrome 31, and Opera 18. But no other browsers were tested. As always you must consider your particular support requirements.
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What's the difference between array_merge and array + array?
...6
Joe DF
4,54466 gold badges3434 silver badges5353 bronze badges
answered Mar 22 '11 at 16:05
Mike LewisMike L...
BLE（一）概述&工作流程&常见问题 - 创客硬件开发 - 清泛IT社区，...
...过程当中的一次颠覆性改变。与前面几代不同的是，蓝牙4.0版引入的BLE协议更注重功耗问题，而非通信速率的提升。这也使得低功耗蓝牙更加节能，能使设备的电池维持很长时间，因此在很多可穿戴设备中得到了应用。
0x2 BLE工...
Reshaping data.frame from wide to long format
... = c("Code", "Country"),
timevar = "Year",
times = 1950:1954)
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UILabel with text of two different colors
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edited Apr 30 '14 at 17:34
Alex Cio
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an...
How to check whether a string contains a substring in Ruby
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1394
You can use the include? method:
my_string = "abcdefg"
if my_string.include? "cde"
puts "Str...
Get value when selected ng-option changes
...em.name);
}
}
Live example: http://jsfiddle.net/choroshin/9w5XT/4/
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vs2008编译boost详细步骤 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...用C++代码直接表达EBNF；
（3）Graph，图组件和算法；
（4）Lambda，在调用的地方定义短小匿名的函数对象，很实用的functional功能；
（5）concept check，检查泛型编程中的concept；
（6）Mpl，用模板实现的元编程框架；
（7）Thread，...