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淘宝应对双\"11\"的技术架构分析 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...看到，笔记本电脑的尺寸这一属性有着10个枚举值，而“蓝牙功能”这个属性值是个布尔值，数据的筛选性非常差。
在用户所选择的过滤条件不确定的情况下，解决全属性问题的思路有两个：一个是穷举所有可能的过滤条件组...
Understanding ibeacon distancing
... basic concept of how distancing with ibeacon (beacon/ Bluetooth-lowenergy/BLE) can work. Is there any true documentation on how far exactly an ibeacon can measure. Lets say I am 300 feet away...is it possible for an ibeacon to detect this?
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import module from string variable
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importlib should be avaliable on pypi for < python2.7
– Jeffrey Jose
Aug 19 '12 at 12:12
51
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How to set an environment variable only for the duration of the script?
On Linux (Ubuntu 11.04) in bash, is it possible to temporarily set an environment variable that will only be different from the normal variable for the duration of the script? For example, in a shell script, making an app that saves to HOME portable by temporarily setting HOME to a folder in the pre...
Where to place $PATH variable assertions in zsh?
I love zsh , but I am not sure where to place my $PATH and other variable assertions? I find that they are scattered between the files .zshrc .zprofile .bashrc .bash_profile , and sometimes doubled.
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Making code internal but available for unit testing from other projects
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If you're using .NET, the InternalsVisibleTo assembly attribute allows you to create "friend" assemblies. These are specific strongly named assemblies that are allowed to access internal classes and members of the other assembly.
Note, this should be used with d...
IOException: read failed, socket might closed - Bluetooth on Android 4.3
... It doesn't work on nexus 4. can you please tell how to overcome this problem. I have almost tried everything. Thanks.
– Shah
Feb 27 '15 at 19:45
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How do you write a migration to rename an ActiveRecord model and its table in Rails?
I'm terrible at naming and realize that there are a better set of names for my models in my Rails app. Is there any way to use a migration to rename a model and its corresponding table?
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C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...下步骤：
1、导入并封装Excel中的接口
Excel作为OLE/COM库插件，定义好了各类交互的接口，这些接口是跨语言的接口。VC可以通过导入这些接口，并通过接口来对Excel的操作。
由于本文只关心对Excel表格中的数据的读取，主要关注...
Is it abusive to use IDisposable and “using” as a means for getting “scoped behavior” for exception
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I don't think so, necessarily. IDisposable technically is meant to be used for things that have non-managed resources, but then the using directive is just a neat way of implementing a common pattern of try .. finally { dispose }.
A purist would argue 'yes - it's...