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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...
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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Can I change the color of auto detected links on UITextView?
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edited Mar 10 '15 at 9:41
ThomasCle
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answered ...
Using Enums while parsing JSON with GSON
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edited Jun 4 '16 at 16:22
dthulke
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answered Nov 22 '...
一文了解大数据领域创业的机会与方向 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...你说,大数据是一种思维,一种技术,标志的是大数据的4V特点:
Volume(大量)、Velocity(高速)、Variety(多样)、Value(价值)。大数据带来的是一种变革,打破了原有的随机分析(抽样调查)方法,采用所有全量的数据来进行分析,分析...
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...
Reshaping data.frame from wide to long format
... = c("Code", "Country"),
timevar = "Year",
times = 1950:1954)
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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,...
