Tutorial by Examples: i

Weighted Job Scheduling Algorithm can also be denoted as Weighted Activity Selection Algorithm. The problem is, given certain jobs with their start time and end time, and a profit you make when you finish the job, what is the maximum profit you can make given no two jobs can be executed in parallel...

To store a graph, two methods are common: Adjacency Matrix Adjacency List An adjacency matrix is a square matrix used to represent a finite graph. The elements of the matrix indicate whether pairs of vertices are adjacent or not in the graph. Adjacent means 'next to or adjoining something el...

The Assignment Operator is when you replace the data with an already existing(previously initialized) object with some other object's data. Lets take this as an example: // Assignment Operator #include <iostream> #include <string> using std::cout; using std::endl; class Foo { ...

Ok we have briefly looked over what the copy constructor and assignment constructor are above and gave examples of each now let's see both of them in the same code. This code will be similar as above two. Let's take this : // Copy vs Assignment Constructor #include <iostream> #include <s...

After you've enabled migrations (please refer to this example) you are now able to create your first migration containing an initial creation of all database tables, indexes and connections. A migration can be created by using the command Add-Migration <migration-name> This command will c...

Note that the allowDiskUse: true option is optional but will help mitigate out of memory issues as this aggregation can be a memory intensive operation if your collection size is large - so i recommend to always use it. var duplicates = []; db.transactions.aggregate([ { $group: { _id: { c...

Here's a quick GIF to make the process as easy as it can be. Labels can be applied to issues and pull requests to signify priority, category, or any other information that you find useful. On GitHub, navigate to the main page of the repository. Under your repository name, click Issues or ...

There are several ways to implement a plugin system for a Java application. One of the simplest is to use URLClassLoader. The following example will involve a bit of JavaFX code. Suppose we have a module of a main application. This module is supposed to load plugins in form of Jars from 'plugins' f...

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01 field-1 PIC X(80) BASED. ALLOCATE field-1 *> use field-1 FREE field-1 *> further use of field-1 will cause memory corruption

Add a reference of AjaxToolkitControl.dll into your project. Then drag and drop Toolkit Script Manager and AjaxFileUpload Control from Visual Studio Toolbox window to your .aspx page like this : use this code on your aspx.cs file Make sure you have created folder named as Uploads in...

Given Example class extending BaseExample class with some properties: open class BaseExample(val baseField: String) class Example(val field1: String, val field2: Int, baseField: String): BaseExample(baseField) { val field3: String get() = "Property without backing ...

Consider the dataframes left and right left = pd.DataFrame([['a', 1], ['b', 2]], list('XY'), list('AB')) left A B X a 1 Y b 2 right = pd.DataFrame([['a', 3], ['b', 4]], list('XY'), list('AC')) right A C X a 3 Y b 4 join Think of join as wanting to combine to dat...

The onTouchEvents() for nested view groups can be managed by the boolean onInterceptTouchEvent. The default value for the OnInterceptTouchEvent is false. The parent's onTouchEvent is received before the child's. If the OnInterceptTouchEvent returns false, it sends the motion event down the cha...

type Dog = Dog String dogName1 dog = case dog of Dog name -> name dogName2 (Dog name) -> name dogName1 and dogName2 are equivalent. Note that this only works for ADTs that have a single constructor. type alias Pet = { name: String , weight: Float ...

Add the Gtk dependecy to your Cargo.toml: [dependencies] gtk = { git = "https://github.com/gtk-rs/gtk.git" } Create a simple window with the following: extern crate gtk; use gtk::prelude::*; // Import all the basic things use gtk::{Window, WindowType, Label}; fn main() { ...

extern crate gtk; use gtk::prelude::*; use gtk::{Window, WindowType, Label, Entry, Box as GtkBox, Orientation}; fn main() { if gtk::init().is_err() { println!("Failed to initialize GTK."); return; } let window = Window::new(WindowType::Toplevel); ...

When some programmers see this advice: "Testing strings using == is incorrect (unless the strings are interned)" their initial reaction is to intern strings so that they can use ==. (After all == is faster than calling String.equals(...), isn't it.) This is the wrong approach, from...

IF A = 1 OR 2 THEN perform miracles END-IF IF A = 1 OR 2 AND B = 1 THEN perform rites-of-passage ELSE perform song-and-dance END-IF IF statements can be terminated with full stop or explicit scope terminator END-IF. Use of periods for scope termination is no longer recommend...

Huffman code is a particular type of optimal prefix code that is commonly used for lossless data compression. It compresses data very effectively saving from 20% to 90% memory, depending on the characteristics of the data being compressed. We consider the data to be a sequence of characters. Huffman...