Tutorial by Examples: le

Min-Heap 1 / \ 2 3 / \ / \ 4 5 6 7 The above tree is a Min-Heap since the root is the minimum among all the nodes present in the tree.The same property is followed by all the nodes in the tree. Max-Heap 7 / \ 6 5 / \ /...

There are various approach to read a excel file. I'll provide a example with file path parameter. You can get various way to read a file at this post. public void ReadExcel(string path) { // Write data in workbook from xls document. XSSFWorkbook workbook = new XSS...

// Import the action types to recognize them import { ACTION_ERROR, ACTION_ENTITIES_LOADED, ACTION_ENTITY_CREATED } from './actions'; // Set up a default state const initialState = { error: undefined, entities: [], loading: true }; // If no state is provided, we take the defa...

This bug was reported by steve2916 from this Microsoft Windows Forum thread. Cause Consider a folder with such files. TestA.doc TestB.doc TestC.docx TestD.docx If we want to remove all .doc file in this directory, we usually would do: del *.doc However, this command also removes the ....

You can copy and paste this whole plugin to try it. The class skeleton is used from here. class-oop-ajax.cpp <?php /** * The plugin bootstrap file * * This file is read by WordPress to generate the plugin information in the plugin * Dashboard. This file defines a function that start...

Returns elements from the given collection until the specified condition is true. If the first element itself doesn't satisfy the condition then returns an empty collection. Signature of TakeWhile(): Public static IEnumerable <TSource> TakeWhile<TSource>(this IEnumerable <TSource&gt...

Skips elements based on a condition until an element does not satisfy the condition. If the first element itself doesn't satisfy the condition, it then skips 0 elements and returns all the elements in the sequence. Signature of SkipWhile(): Public static IEnumerable <TSource> SkipWhile<TS...

Algorithm This algorithm is a two step process.First we create a auxiliary array lps[] and then use this array for searching the pattern. Preprocessing : We pre-process the pattern and create an auxiliary array lps[] which is used to skip characters while matching. Here lps[] indicates longes...

Cold observable implementation, emits true when TTS engine finishes speaking, starts speaking when subscribed. Notice that API level 21 introduces different way to perform speaking: public class RxTextToSpeech { @Nullable RxTTSObservableOnSubscribe audio; WeakReference<Context> contextR...

If you call plt.legend() or ax.legend() more than once, the first legend is removed and a new one is drawn. According the official documentation: This has been done so that it is possible to call legend() repeatedly to update the legend to the latest handles on the Axes Fear not, though: It ...

In order to clear the selection of those values which are selected using a Select2 drop down,we can use the empty() function. <select id="select2_example"> <option>Option1</option> <option>Option2</option> <option>Option3</option> </select&...

In this example I will show you how to make a basic lexer which will create the tokens for a integer variable declaration in python. What does the lexical analyser do? The purpose of a lexer (lexical analyser) is to scan the source code and break up each word into a list item. Once done it tak...

This is a simple parser which will parse an integer variable declaration token stream which we created in the previous example Simple Lexical Analyser. This parser will also be coded in python. What is a parser? The parser is the process in which the source text is converted to an abstract syn...

Suppose we have an API which allows us to get object metadata in single request (getAllPets), and other request which have full data of single resource (getSinglePet). How we can query all of them in a single chain? public class PetsFetcher { static class PetRepository { List<Integer&g...

Using the DEL(alias for ERASE) command, one can remove files. @echo off del foo.ext This command will delete foo.ext from the current directory. One can also specify path and file, such as: del C:\Foo\Bar\Baz.ext But it is always ideal to put quotes (") around paths, see here for the r...

In this example, user BoeNoe showed how to use the command xcopy to copy files. There is also an extra command called copy. Here is a simple example: copy foo.ext bar.ext This copies foo.ext to bar.ext, and create bar.ext when it doesn't exist. We can also specify paths to the file, but it is a...

It is also possible to have an user upload csv's to your Shiny app. The code below shows a small example on how this can be achieved. It also includes a radioButton input so the user can interactively choose the separator to be used. library(shiny) library(DT) # Define UI ui <- shinyUI(flui...

<?php //Creating Connection to MySQL database using MySQLi $mysqli = mysqli_connect("IP ADDRESS OR DOAMIN", "username", "password", "database_name"); //Executing Query in the Database using MySQLi $result = mysqli_query($mysqli, "SELECT * FROM T...

You can also easily wrap all angular modules, which you are going to use, into one module: import { NgModule } from '@angular/core'; import { MdButtonModule, MdSnackBarModule, MdSidenavModule } from '@angular/material'; @NgModule({ imports: [ BrowserAnimationsModule, MdB...

This example will demonstrate the searchable select box in MVC. it uses Ajax to get all records from database as user types the new character. I'll consider Country and its City example to illustrate the functionality of Searchable dropdown box. Code behind is c# with MVC, but its easy to grasp wh...