dmiro

"""
CHEAT 5: yield

Generators are iterators, but you can only iterate over them once. It's because they do not
store all the values in memory, they generate the values on the fly.
Yield is a keyword that is used like return, except the function will return a generator.

http://freepythontips.wordpress.com/2013/09/29/the-python-yield-keyword-explained/
http://www.alvarohurtado.es/generadores-en-python/
"""

dmiro

"""
CHEAT 4: with and @contextmanager decorator
 
Creating context managers the traditional way, by writing a class with __enter__() and __exit__() methods,
is not difficult. But sometimes it is more overhead than you need just to manage a trivial bit of context.
In those sorts of situations, you can use the contextmanager() decorator to convert a generator function
into a context manager.
  
http://pymotw.com/2/contextlib/#from-generator-to-context-manager
"""

dmiro

"""
CHEAT 3: a class with person property using property class
 
There are two ways to specify a property: 
  (1) property class 
  (2) @property decorator
  
https://docs.python.org/2/library/functions.html#property
"""
 

dmiro

"""
CHEAT 2: clausule With and Context Managers

In python the with keyword is used when working with unmanaged resources (like file streams).
It is similar to the using statement in VB.NET and C#
It allows you to ensure that a resource is "cleaned up" when the code that uses it finishes running,
even if exceptions are thrown. It provides 'syntactic sugar' for try/finally blocks.

https://docs.python.org/2/whatsnew/2.6.html#pep-343-the-with-statement
"""

dmiro

"""
CHEAT 1: a class with person property using @property decorator

There are two ways to specify a property: 
  (1) property class 
  (2) @property decorator
  
https://docs.python.org/2/library/functions.html#property
"""

dmiro

"hola esto es un split a lista en python".split()
# ['hola', 'esto', 'es', 'un', 'split', 'a', 'lista', 'en', 'python']
 

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text = (u'%s' % 'voil\u00e0').encode('utf-8')
# voilà

dmiro

from dateutil.parser import parse
parse('hola que tal 25 October 1990 ya esta', fuzzy=True) 
# datetime.datetime(1990, 10, 25, 0, 0)

dmiro

var original=28.453
//round "original" to two decimals
var result=Math.round(original*100)/100  //returns 28.45

// round "original" to 1 decimal
var result=Math.round(original*10)/10  //returns 28.5

//round 8.111111 to 3 decimals
var result=Math.round(8.111111*1000)/1000  //returns 8.111

dmiro

var foo = {
    hasOwnProperty: function() {
        return false;
    },
    bar: 'Here be dragons'
};
foo.hasOwnProperty('bar'); // siempre devolverá false
// Utilice otro objeto con hasOwnProperty y llamelo con 'this' para asignarlo a foo
({}).hasOwnProperty.call(foo, 'bar'); // true