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When saving, how can you check if a field has changed?
... A model mixin that tracks model fields' values and provide some useful api
to know what fields have been changed.
"""
def __init__(self, *args, **kwargs):
super(ModelDiffMixin, self).__init__(*args, **kwargs)
self.__initial = self._dict
@property
def diff(se...
How to format numbers? [duplicate]
...
On browsers that support the ECMAScript® 2016 Internationalization API Specification (ECMA-402), you can use an Intl.NumberFormat instance:
var nf = Intl.NumberFormat();
var x = 42000000;
console.log(nf.format(x)); // 42,000,000 in many locales
// 42.000.000 in ma...
Vagrant stuck connection timeout retrying
...ile should look like more or less as below:
Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
config.ssh.username = "vagrant"
config.ssh.password = "vagrant"
config.vm.provider "virtualbox" do |vb|
vb.gui = true
end
end
In my case even if GUI was displayed I got black screen...
Why does Python code use len() function instead of a length method?
...t behave like the built-ins, enabling the expressive and highly consistent APIs we call "Pythonic".
By implementing special methods your objects can support iteration, overload infix operators, manage contexts in with blocks etc. You can think of the Data Model as a way of using the Python languag...
What is the difference between compile and link function in angularjs
...o figure out how one might deal with needing to pull that data from a REST API (hint: deferred compile).
SCENARIO 3: two-way data binding via link
Of course the most common use of link is to simply hook up the two-way data binding via watch/apply. Most directives fall into this category, so it is ...
How do I break out of a loop in Scala?
...oop.
Scala 2.8 however includes a way to break
http://www.scala-lang.org/api/rc/scala/util/control/Breaks.html
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Accessing Object Memory Address
...hem out? Sure (again, assuming you only care about CPython).
All of the C API functions take a pointer to a PyObject or a related type. For those related types, you can just call PyFoo_Check to make sure it really is a Foo object, then cast with (PyFoo *)p. So, if you're writing a C extension, the ...
Android Shared preferences for creating one time activity (example) [closed]
...or.apply();//Keep going and save when you are not busy - Available only in APIs 9 and above. This is the preferred way of saving.
}
public String get(String key) {//Log.v("Keystore","GET from "+key);
return SP.getString(key, null);
}
public int getInt(String key) {//Log.v("Keystore","GET INT...
How do I protect Python code? [closed]
...he code as C or C++ libraries and then use SIP or swig to expose the C/C++ APIs to Python namespace.
(b) Use cython instead of Python
(c) In both (a) and (b), it should be possible to distribute the libraries as licensed binary with a Python interface.
...
capturing self strongly in this block is likely to lead to a retain cycle
...kSelves into the world.
Apple even forces these warnings upon us with the API to their UIPageViewController, which includes a set method (which triggers these warnings–as mentioned elsewhere–thinking you are setting a value to an ivar that is a block) and a completion handler block (in which yo...