Tutorial by Examples: od

Model, Querying and Saving Data

Model With EF Core, data access is performed using a model. A model is made up of entity classes and a derived context that represents a session with the database, allowing you to query and save data. You can generate a model from an existing database, hand code a model to match your database, or ...

Entity Framework Core • Getting started with Entity Framework Core

Introduction to Stripe's API

A typical payment flow with Stripe can be divided in two steps: Client-side, in your frontend (HTML + Javascript) code, you collect the customer's payment information using Stripe's prebuilt Checkout form or Elements form field(s). This will return a token that you then send to your server. ...

stripe-payments • Getting started with stripe-payments

Cronjob in Codeigniter

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); class Cron extends CI_Controller { /** * This is default constructor of the class */ public function __construct() { parent::__construct(); $this->load->library('input'...

codeigniter • Creating cronjob in codeigniter on linux hosting server

Pre Controller Hook example using CodeIgniter

In application/hooks folder, create a file with name Blocker.php and paste the below code. <?php class Blocker { function Blocker(){ } /** * This function used to block the every request except allowed ip address */ function requestBlocker(){ ...

codeigniter • Use of hooks

Adding Test Files to Xcode Project

When creating the project You should check "Include UI Tests" in the project creation dialog. After creating the project If you missed checking UI target while creating project, you could always add test target later. Setps: While project open go to File -> New -> Target Fi...

iOS • UI Testing

4. Chaining string manipulation methods together.

Dim exStr : exStr = " <Head>data</Head> " Dim res res = Ucase(Replace(Mid(exStr, instr(exStr, ">")+1,4), "ata", "ark")) 'res now equals DARK 'instr(exStr, ">") returns 7 'Mid(" <Head>data</Head> ", 7+1,...

vbscript • Strings

Two dimensional (2D) arrays

Display a two dimensional (2D) array on the axes. import numpy as np from matplotlib.pyplot import imshow, show, colorbar image = np.random.rand(4,4) imshow(image) colorbar() show()

matplotlib • Getting started with matplotlib

Routing and HTTP methods

By default, routes only respond to GET requests. You can change this behavior by supplying the methods argument to the route() decorator. from flask import request @app.route('/login', methods=['GET', 'POST']) def login(): if request.method == 'POST': do_the_login() else: ...

Flask • Routing

Pseudocode Implementation

(input) output = 0 for cycleStart from 0 to length(array) - 2 item = array[cycleStart] pos = cycleStart for i from cycleStart + 1 to length(array) - 1 if array[i] < item: pos += 1 if pos == cycleStart: continue while item == array[pos]: ...

algorithm • Cycle Sort

Psuedocode Implementation

Constraints: Input (an array to be sorted) Number of element in input (n) Keys in the range of 0..k-1 (k) Count (an array of number) Pseudocode: for x in input: count[key(x)] += 1 total = 0 for i in range(k): oldCount = count[i] count[i] = total total += oldCount for...

algorithm • Counting Sort

Introduction To Dynamic Time Warping

Dynamic Time Warping(DTW) is an algorithm for measuring similarity between two temporal sequences which may vary in speed. For instance, similarities in walking could be detected using DTW, even if one person was walking faster than the other, or if there were accelerations and decelerations during ...

algorithm • Dynamic Time Warping

Introduction to DataGridView

A DataGridView is a control in .NET UI design, which consists of rows and columns used to arrange data. Often there is need to depict data either from a spreadsheet or database on a UI design in an application. When this data is to be shown grouped by its properties, we choose a DataGridView. In C...

datagridview • Getting started with datagridview

Applying filter on OData and Viz-Chart

This is an example of Viz-Charts with line-chart with filters. There are a lot of techniques this is one to solve the filtering issue. Point to be noted is that you need to bind the Dataset of VizFrame by its ID and then apply the filtering on the FlattenedDataset In the controller: // defining...

sapui5 • Charts

Model Class

class Post < ActiveRecord::Base belongs_to :user has_many :comments validates :user, presence: true validates :title, presence: true, length: { in: 6..40 } scope :topic, -> (topic) { joins(:topics).where(topic: topic) } before_save :update_slug after_create :send_wel...

Ruby on Rails • Class Organization

Creating a PyQt Window By Code

In this example, we trying to create a gui with only through code rather than using any ui file. Its a very basic example you need to extend based on your need." from PyQt4 import QtCore, QtGui import maya.OpenMayaUI as mui import sip class Ui_MainWindow(QtGui.QMainWindow): def __ini...

maya • Creating PyQt GUI With Maya

My First Method

Overview Create a new file named my_first_method.rb Place the following code inside the file: def hello_world puts "Hello world!" end hello_world() # or just 'hello_world' (without parenthesis) Now, from a command line, execute the following: ruby my_first_method.rb The ou...

Ruby Language • Getting started with Ruby Language

Running user-specified code when an Object is garbage collected.

/** * Runs user-specified code when the given javascript object is garbage collected */ template<class CALLBACK_FUNCTION> void global_set_weak(v8::Isolate * isolate, const v8::Local<v8::Object> & javascript_object, CALLBACK_FUNCTION function) { struct SetWeakCallbackData{...

v8 • Weak Callbacks

Load model

You can load Magento model using the following code: Mage::getModel('modulename/modelname') Example: Mage::getModel('catalog/product') This will load Mage_Catalog_Model_product

magento • Model

Create an empty model

To create a new model in your module Add a folder Model in your module root folder and create a file Modelname.php in this folder. for example Rick/Demo/Model/Modelname.php The class name of your model does matter call it like this: <?php class Rick_Demo_Model_Modelname { } make sure y...

magento • Model

The 'throws' clause in a method declaration

Java's checked exception mechanism requires the programmer to declare that certain methods could throw specifed checked exceptions. This is done using the throws clause. For example: public class OddNumberException extends Exception { // a checked exception } public void checkEven(int number) ...

Java Language • Exceptions and exception handling