Tutorial by Examples: d

package main import ( "encoding/gob" "fmt" "log" "os" ) type User struct { Username string Password string } type Admin struct { Username string Password string IsAdmin bool } type Deleter interface ...

var providerName = "System.Data.SqlClient"; //Oracle.ManagedDataAccess.Client, IBM.Data.DB2 var connectionString = "{your-connection-string}"; //you will probably get the above two values in the ConnectionStringSettings object from .config file var factory = DbProviderFac...

Assume that I have a file named in.txt: $ cat in.txt a b a c a d I only want to replace the a\nc with deleted, but not a\nb or a\nd. $ sed -e ':loop # create a branch/label named `loop` $!{ N # append the next line of input into the pattern space /\n$/!b...

Setup Steps: Download and install jdk8. Add the following to your project’s main build.gradle buildscript { repositories { mavenCentral() } dependencies { classpath 'me.tatarka:gradle-retrolambda:3.2.3' } } Now add this to your application m...

Decription happens by the same cicle showed in the encryption example. Example: EncryptedOriginalAXEEH PHKEWHELLO WORLD

There can be up to 12 independent variables, there is always 1 dependent variable, and any number of parameters can be fitted. Optionally, error estimates can be input for weighting the data points. (T. Williams, C. Kelley - gnuplot 5.0, An Interactive Plotting Program) If you have a data set a...

Complete the Installation and setup part to connect your app to Firebase. This will create the project in Firebase. Add the dependency for Firebase Cloud Messaging to your module-level build.gradle file: dependencies { compile 'com.google.firebase:firebase-messaging:10.2.1' } ...

The basic use of fit is best explained by a simple example: f(x) = a + b*x + c*x**2 fit [-234:320][0:200] f(x) ’measured.dat’ using 1:2 skip 4 via a,b,c plot ’measured.dat’ u 1:2, f(x) Ranges may be specified to filter the data used in fitting. Out-of-range data points are ignored. (T. W...

SQL has two logical functions – CHOOSE and IIF. The CHOOSE function returns an item from a list of values, based on its position in the list. This position is specified by the index. In the syntax, the index parameter specifies the item and is a whole number, or integer. The val_1 … val_n paramete...

Try catch Errors must always be handled. If you are using synchronous programming you could use a try catch. But this does not work if you work asynchronous! Example: try { setTimeout(function() { throw new Error("I'm an uncaught error and will stop the server!"); }, 1...

Progress supports one dimensional arrays, but they are called EXTENTS. /* Define a character array with the length 5, and display it's length */ DEFINE VARIABLE a AS CHARACTER EXTENT 5 NO-UNDO. DISPLAY EXTENT(a). Individual positions i the array is accessed using "standard" c-style b...

array_add() This method is used to add new key value pairs to an array. $array = ['username' => 'testuser']; $array = array_add($array, 'age', 18); result ['username' => 'testuser', 'age' => 18]

camel_case() This method changes a string to camel case camel_case('hello_world'); result HelloWorld

Path methods helps easy access to application related paths easily from anywhere. public_path() This method returns the fully qualified public path of the application. which is the public directory. $path = public_path();

The useGravity property of a RigidBody controls whether gravity affects it or not. If set to false the RigidBody will behave as if in outer space (without a constant force being applied to it in some direction). GetComponent<RigidBody>().useGravity = false; It is very useful in the situati...

From the Welcome to Android Studio dialogue box, select New Project... to open the Create New Project dialog. In the New Android Application dialog, under Application name, specify an appropriate application name. The remainder of this tutorial uses BasicMapSolution as the application name....

Use browser.driver instead of driver Use browser.driver.ignoreSynchronization = true Reason: Protractor waits for angular components to load completely on a web-page befor it begins any execution. However, since our pages are non-angular, Protractor keeps waiting for 'angular' to load till the tes...

using MailKit.Net.Smtp; using MimeKit; using MimeKit.Text; using System.Threading.Tasks; namespace Project.Services { /// Using a static class to store sensitive credentials /// for simplicity. Ideally these should be stored in /// configuration files public static class C...

Before starting with deletion I just want to put some lights on what is a Binary search tree(BST), Each node in a BST can have maximum of two nodes(left and right child).The left sub-tree of a node has a key less than or equal to its parent node's key. The right sub-tree of a node has a key greater ...

Array Implementation #include<stdio.h> #define MAX 100000 //Global variables int top = -1; int a[MAX]; void push(int x){ if(top == MAX-1){ // Check whether stack is full printf("Stack Overflow\n"); retur...