The dynamics of the Geometric Brownian Motion (GBM) are described by the following stochastic differential equation (SDE):
I can use the exact solution to the SDE
to generate paths that follow a GBM.
Given daily parameters for a year-long simulation
mu = 0.08/250;
sigma = 0.25/sqrt(...
int getListOfFriends(size_t size, int friend_indexes[]) {
size_t i = 0;
for (; i < size; i++) {
friend_indexes[i] = i;
}
}
C99C11
/* Type "void" and VLAs ("int friend_indexes[static size]") require C99 at least.
In C11 VLAs are optional. */
void getLis...
Leiningen
Note: If you're going to use Leiningen, you first need to download and install JDK 6 or newer.
The easiest way to get started with Clojure is to download and install Leiningen, the de facto standard tool to manage Clojure projects.
Linux:
curl https://raw.githubusercontent.com/technoma...
Numpy installation through pypi (the default package index used by pip) generally fails on Windows computers. The easiest way to install on Windows is by using precompiled binaries.
One source for precompiled wheels of many packages is Christopher Gohkle's site. Choose a version according to your ...
Django uses migrations to propagate changes you make to your models to your database. Most of the time django can generate them for you.
To create a migration, run:
$ django-admin makemigrations <app_name>
This will create a migration file in the migration submodule of app_name. The first...
Sometimes, migrations generated by Django are not sufficient. This is especially true when you want to make data migrations.
For instance, let's you have such model:
class Article(models.Model):
title = models.CharField(max_length=70)
This model already have existing data and now you want ...
Relative positioning moves the element in relation to where it would have been in normal flow .Offset properties:
top
left
right
bottom
are used to indicate how far to move the element from where it would have been in normal flow.
.relpos{
position:relative;
top:20px;
left:3...
When absolute positioning is used the box of the desired element is taken out of the Normal Flow and it no longer affects the position of the other elements on the page. Offset properties:
top
left
right
bottom
specify the element should appear in relation to its next non-static containing ...
Sometimes it's not a good practice expose an internal collection since it can lead to a malicious code vulnerability due to it's mutable characteristic. In order to provide "read-only" collections java provides its unmodifiable versions.
An unmodifiable collection is often a copy of a mod...
Prerequisites
nodejs
To install the latest stable release of sails with the command-line tool issue following command:
$ sudo npm install sails -g
Depending on your OS you might not need to use sudo.
In order to specify which version of python the Linux shell should use the first line of Python scripts can be a shebang line, which starts with #!:
#!/usr/bin/python
If you are in a virtual environment, then python myscript.py will use the Python from your virtual environment, but ./myscript.py...
In Rails, you find yourself looking at controllers, views, and models for your database.
To reduce the need for heavy configuration, Rails implements rules to ease up working with the application. You may define your own rules but for the beginning (and for later on) it's a good idea to stick to co...
By default, the various Collection types are not thread-safe.
However, it's fairly easy to make a collection thread-safe.
List<String> threadSafeList = Collections.synchronizedList(new ArrayList<String>());
Set<String> threadSafeSet = Collections.synchronizedSet(new HashSet<S...
Python uses indentation to define control and loop constructs. This contributes to Python's readability, however, it requires the programmer to pay close attention to the use of whitespace. Thus, editor miscalibration could result in code that behaves in unexpected ways.
Python uses the colon symbo...
This command print all relevant application data:
version code
version name
granted permissions (Android API 23+)
etc..
adb shell dumpsys package <your.package.id>
GitHub is a huge collection of Git repositories. In other words, you can think of GitHub as a collection of many projects!
Creating An Account
Visit GitHub's main page Here
Pick a username, enter in your email address, and pick a secure password and you're ready to go!
Useful Tools
For Git/...
Writing a view to create object can be quite boring. You have to display a form, you have to validate it, you have to save the item or return the form with an error. Unless you use one of the generic editing views.
app/views.py
from django.core.urlresolvers import reverse_lazy
from django.views.g...
