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刘强东“一元年薪”背后的O2O棋局 - 资讯 - 清泛网 - 专注C/C++及内核技术
...电商未来的发展路线？
“现在应该是对线上线下的企业如何按照新的规则围绕互联网和用户运转下去的摸索状态。”唐兴通举个例子：以前超市只是卖东西，未来它可能还用于仓储；以前电商要做物流配送，未来它可能借助超...
Ruby convert Object to Hash
...> 15.95 }}
If you need a hash that's stored in the object use as_json(root: false). I think by default root will be false. For more info refer official ruby guide
http://api.rubyonrails.org/classes/ActiveModel/Serializers/JSON.html#method-i-as_json
...
Express-js can't GET my static files, why?
...
Simply write
app.use(express.static('public/images'));
i.e remove the root directory name in the path. And then you can use the static path effectively in other js files, For example:
<img src="/images/misc/background.jpg">
Hope this helps :)
...
MongoDB Aggregation: How to get total records count?
...al' => array( '$sum' => 1 ), 'results' => array( '$push' => '$$ROOT' ) ),
// apply limit and offset
array('$project' => array( 'total' => 1, 'results' => array( '$slice' => array( '$results', $skip, $length ) ) ) )
))
Result will look something like this:
[
{
"_id"...
Extract a part of the filepath (a directory) in Python
...>> p.name
'iexplore.exe'
>>> p.suffix
'.exe'
>>> p.root
'\\'
>>> p.parts
('C:\\', 'Program Files', 'Internet Explorer', 'iexplore.exe')
>>> p.relative_to('C:\Program Files')
WindowsPath('Internet Explorer/iexplore.exe')
>>> p.exists()
True
...
Rails: call another controller action from a controller
...
if I try to redirect_to a root controller like "MyOtherController", from a controller like "Module::MyController".. it will resolve to calling "module/MyOtherController" .. any idea how I can call the root?
– ggez44
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Importing files from different folder
...
If you run it from your root folder (ie. application folder), you are probably fine with sys.path.append('.') then importing the module by using from app2.some_folder.some_file import your_function. Alternatively what works for me is running python...
Why are data transfer objects (DTOs) an anti-pattern?
... you can use reflection to generate DTOs on the fly. Second you can use a "root definition" e.g. in a CASE system or in oAW and generate the BO and DTO(s). Third of all you can use an XSD and JAXB to generate DTOs and use the DTO as base for an BO, or you can generate both from the XSD ... anyway, i...
Logging uncaught exceptions in Python
...ere is the output with sys.excepthook as seen above:
$ python tb.py
ERROR:root:Unhandled exception: Traceback (most recent call last):
File "tb.py", line 11, in <module>
None()
TypeError: 'NoneType' object is not callable
Here is the output with the sys.excepthook commented out:
$ py...
How do I import global modules in Node? I get “Error: Cannot find module ”?
...an use npm itself to tell you where global modules are stored with the npm root -g command. So putting those two together, you can make sure global modules are included in your search path with the following command (on Linux-ish)
export NODE_PATH=$(npm root --quiet -g)
...