Tutorial by Examples: re

Laravel resource routing assigns the typical "CRUD" routes to a controller with a single line of code. For example, you may wish to create a controller that handles all HTTP requests for "photos" stored by your application. Using the make:controller Artisan command, we can quickl...

A simple OGL 4.0 GLSL shader program that shows how to map a 2D texture on a mesh. The program is executed with a phyton script. To run the script, PyOpenGL and NumPy must be installed. The texture matrix defines how the texture is mapped on the mesh. By manipulating the texture matrix, the textu...

This widget is used to display items with hierarchy. For instance, windows explorer can be reproduced in this way. Some nice tables can be also done using treeview widget. Create the widget tree=ttk.Treeview(master) Definition of the columns You can define how many columns, their width and min...

Each x sigil call respective sigil_x definition Defining Custom Sigils defmodule MySigils do #returns the downcasing string if option l is given then returns the list of downcase letters def sigil_l(string,[]), do: String.Casing.downcase(string) def sigil_l(string,[?l]), do: String.Casing...

By taking Treeview: Basic example, it can be shown how to customize a basic treeview. In this case, we create a style "mystyle.Treeview" with the following code (see the comments to understand what each line does): style = ttk.Style() style.configure("mystyle.Treeview", highli...

The widget ttk.progress is useful when dealing with long computations so that the user knows that the program is running. Following, an example updating a progressbar each 0.5 seconds is given: Function updating the progressbar def progress(currentValue): progressbar["value"]=curren...

from chempy import balance_stoichiometry # Main reaction in NASA's booster rockets: reac, prod = balance_stoichiometry({'NH4ClO4', 'Al'}, {'Al2O3', 'HCl', 'H2O', 'N2'}) from pprint import pprint pprint(reac) {'Al': 10, 'NH4ClO4': 6} pprint(prod) {'Al2O3': 5, 'H2O': 9, 'HCl': 6, 'N2': 3} ...

from chempy import Equilibrium from sympy import symbols K1, K2, Kw = symbols('K1 K2 Kw') e1 = Equilibrium({'MnO4-': 1, 'H+': 8, 'e-': 5}, {'Mn+2': 1, 'H2O': 4}, K1) e2 = Equilibrium({'O2': 1, 'H2O': 2, 'e-': 4}, {'OH-': 4}, K2) coeff = Equilibrium.eliminate([e1, e2], 'e-') coeff [4, -5...

from chempy.electrolytes import ionic_strength ionic_strength({'Fe+3': 0.050, 'ClO4-': 0.150}) == .3 True

from chempy import ReactionSystem # The rate constants below are arbitrary rsys = ReactionSystem.from_string("""2 Fe+2 + H2O2 -> 2 Fe+3 + 2 OH-; 42 2 Fe+3 + H2O2 -> 2 Fe+2 + O2 + 2 H+; 17 H+ + OH- -> H2O; 1e10 H2O -> H+ + OH-; 1e-4 Fe+3 + 2 H2O -...

The simplest way to use shelve is via the DbfilenameShelf class. It uses anydbm to store the data. You can use the class directly, or simply call shelve.open(): import shelve s = shelve.open('test_shelf.db') try: s['key1'] = { 'int': 10, 'float':9.5, 'string':'Sample data' } finally: ...

The processor just contains just contains the methods needed by the route. It is just a classic Java Bean containing several methods. You can also implement Processor and override the process method. See the code below : @Component("testExampleProcessor") public class TestExampleProcess...

A simple OGL 4.0 GLSL shader program that shows the use of geometry shaders. The program is executed with a phyton script. To run the script, PyOpenGL and NumPy must be installed. In this example, the entire geometry (a cylinder) is generated in the geometry shader. Vertex shader geo.vert #vers...

Relational DatabaseElasticsearchDatabaseIndexTableTypeRow/RecordDocumentColumn Namefield Above table roughly draws an analogy between basic elements of relational database and elasticsearch. Setup Considering Following structure in a relational database: create databse test; use test; crea...

Essence of searching lies in its order. Everyone wants search results to be shown in such a way that best suited results are shown on top. Relational database do not have such capability. Elasticsearch on the other hand shows results on the basis of relevancy by default. Setup Same as used in ...

Searches can also be done on elasticsearch using a search DSL.The query element within the search request body allows to define a query using the Query DSL. GET /my_index/type/_search { "query" : { "term" : { "field_to_search" : "search_item" }...

<?xml version="1.0"?> <openerp> <data noupdate="1"> <function model="*model_name*" name="_configure_sales"/> </data> </openerp> This simple xml file is calls _configure_sales function from model_name ...

class *model_name*(models.Model): _name = *model_name* @api.model def _configure_sales(self): # Do the configuration here Every time when module will be installed this function will run. Note: If you remove noupdate from xml, function will run on upgrading as well.

A basic but illustrative heatmap showing correlations between a number of variables. import pandas as pd import seaborn as sns import numpy as np # Sample dataframe with date index and five variables np.random.seed(123) df = pd.DataFrame(np.random.uniform(-0.25,0.25,size=(5, 5)), ...

In this example i will show how to formulate an rest controller to get and post data to the database using JPA with the most ease and least code. In this example we will refer to the data table named buyerRequirement . BuyingRequirement.java @Entity @Table(name = "BUYINGREQUIREMENTS&q...