[Linux] Find and move files older than a date

list them :

find . -mtime +7 -type f -exec ls -l "{}" \;

move them :

find . -mtime +7 -type f -exec mv "{}" <your_destination_directory> \;

[Knockout] conditionally add attribute

data-bind="
    attr:{
     'selected': typeof(selected) !== 'undefined' ? 'selected' : null  

       }
"

Source : http://stackoverflow.com/questions/12963023/conditionally-add-an-element-attribute-in-knockout-js

[Knockout] Elements are showing up too early, and go away after the corresponding bind variable is initialized

<div style="display: none" data-bind="visible: true">
...
</div>

The visible binding would come through when bound and clear the display style.


Source : https://groups.google.com/forum/#!topic/knockoutjs/_oCWFJUBaq4

[Python] Tornado - send POST parameters in the body with AsyncHTTPClient

If you want to send POST data to an URL(a RESTful web service for example) with AsyncHTTPClient, you can do that :

import urllib
post_data = { 'data': 'test data' } #A dictionary of your post data
body = urllib.urlencode(post_data) #Make it into a post request
http_client = tornado.httpclient.AsyncHTTPClient()
http_client.fetch("http://127.0.0.1:8888", handle_request, method='POST', headers=None, body=body)

Link : http://stackoverflow.com/questions/10367981/how-to-use-post-method-in-tornado

Python.h: No such file or directory

sudo apt-get install python-dev

[Python] pip install : gcc: error: unrecognized command line option '-mno-cygwin'

If you are on Windows and get this message :

gcc: error: unrecognized command line option '-mno-cygwin'

when you type pip install greenlet (or another lib)

Then you must :
- edit or create C:\PythonXX\Lib\distutils\cygwinccompiler.py and remove any traces of -mno-cygwin

- open an new cmd and type again your pip install greenlet (or another lib)

Have fun
:o)

JSON Schema

The official documentation for the JSON Schema (the specification for the JSON Schema is currently published as draft) :
http://json-schema.org

An online JSON validator, using schema :
https://json-schema-validator.herokuapp.com/


A wonderful tutorial explaining the JSON Schema :
http://spacetelescope.github.io/understanding-json-schema/

[Python] __code__ and decorator

http://stackoverflow.com/questions/1166118/how-to-strip-decorators-from-a-function-in-python

http://stackoverflow.com/a/1167248

[iOS] viewDidLoad viewDidAppear viewWillAppear

viewWillLoad/viewDidLoad - called when the view is constructed (via the first call to retrieve the view controller's UIView via it's view property - aka lazy loading)
viewWillAppear: - when the view is being prepared to appear either immediately (animated == NO) or view a transition (animated == YES)
viewDidAppear: - if the view appearance wasn't cancelled and the view controller's view fully appears
viewWillDisappear: - complements viewWillAppear:
viewDidDisappear: - complements viewDidAppear:

viewWillUnload/viewDidUnload - deprecated APIs when the view is unload due to memory constraints (don't worry about these anymore)

Source : http://stackoverflow.com/questions/22214843/ios-7-difference-between-viewdidload-and-viewdidappear

[iOS 8] Detected a case where constraints ambiguously suggest a height of zero for a tableview cell's content view. We're considering the collapse unintentional and using standard height instead

If you have this message :

<<

Warning once only: Detected a case where constraints ambiguously suggest a height of zero for a tableview cell's content view. We're considering the collapse unintentional and using standard height instead.

>>

then just write :

<<

- (CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath

{

    return 44;

}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

{

    return 44;

}

>>

Source : http://stackoverflow.com/questions/25822324/ios8-constraints-ambiguously-suggest-a-height-of-zero