Tutorial by Examples: bas

Mongo supports database-to-database copying, which is useful if you have large databases on a staging database that you want to copy into a local development instance. // run mongod so we can create a staging database // note that this is a separate instance from the meteor mongo and minimongo ins...

Preallocation. Mongo sets aside disk-space in empty containers, so when the time comes to write something to disk, it doesn't have to shuffle bits out of the way first. It does so by a doubling algorithm, always doubling the amount of disk space preallocated until it reaches 2GB; and then each preal...

Here is a basic setting of the Header to change to a new page when a button is clicked. if(isset($_REQUEST['action'])) { switch($_REQUEST['action']) { //Setting the Header based on which button is clicked case 'getState': header("Location: http://NewPageForSta...

Create a new project It can be just a Single View Application. Add the code Create a new Cocoa Touch Class file (File > New > File... > iOS > Cocoa Touch Class). Name it MyCollectionViewCell. This class will hold the outlets for the views that you add to your cell in the storyboard. ...

Go has a built-in logging library known as log with a commonly use method Print and its variants. You can import the library then do some basic printing: package main import "log" func main() { log.Println("Hello, world!") // Prints 'Hello, world!' on a single ...

import scala.util.parsing.combinator._ class SimpleParser extends RegexParsers { // Define a grammar rule, turn it into a regex, and apply it the input. def word: Parser[String] = """[A-Z][a-z]+""".r ^^ { _.toString } } object SimpleParser extends SimplePar...

When inheriting from any base class, only one partial class needs to have the base class specified. // PartialClass1.cs public partial class PartialClass : BaseClass {} // PartialClass2.cs public partial class PartialClass {} You can specify the same base class in more than one partial clas...

Objects come in their own class, so a simple example would be a car (detailed explanations below): public class Car { //Variables describing the characteristics of an individual car, varies per object private int milesPerGallon; private String name; private String color; ...

When dealing with an unbalanced design and/or non-orthogonal contrasts, Type II or Type III Sum of Squares are necessary. The Anova() function from the car package implements these. Type II Sum of Squares assumes no interaction between main effects. If interactions are assumed, Type III Sum of Squar...

What happens if I don't set base_url ? You will not get any Impotency error to set this and proceed. You can continue without setting, but you should know about HTTP header injection If I did't set it what will show up? You will get http://[::1]/ instead of your actual URL. What does this m...

Front matter tells Jekyll to parse a file. You add predefined variables, which are YAML sets, to the front matter. Then, you can use Liquid tags in your files to access the front matter. Front matter is indicated with two triple-dashed lines. You must place the variables between the two triple-dash...

survival is the most commonly used package for survival analysis in R. Using the built-in lung dataset we can get started with Survival Analysis by fitting a regression model with the survreg() function, creating a curve with survfit(), and plotting predicted survival curves by calling the predict m...

library(RODBC) con <- odbcDriverConnect("driver={Sql Server};server=servername;trusted connection=true") dat <- sqlQuery(con, "select * from table"); close(con) This will connect to a SQL Server instance. For more information on what your connection string should loo...

Mage::getBaseUrl();

Pandas uses provides multiple ways to make graphs of the data inside the data frame. It uses matplotlib for that purpose. The basic graphs have their wrappers for both DataFrame and Series objects: Line Plot df = pd.DataFrame({'x': [10, 8, 10, 7, 7, 10, 9, 9], 'y': [6, 4, 5, 5...

An Option is a data structure that contains either a single value, or no value at all. An Option can be thought of as collections of zero or one elements. Option is an abstract class with two children: Some and None. Some contains a single value, and None contains no value. Option is useful in ex...

public class SignUpActivity extends BaseAppCompatActivity { @BindView(R.id.tIETSignUpEmail) EditText mEditEmail; @BindView(R.id.tIETSignUpPassword) EditText mEditPassword; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCrea...

public class LoginActivity extends BaseAppCompatActivity { @BindView(R.id.tIETLoginEmail) EditText mEditEmail; @BindView(R.id.tIETLoginPassword) EditText mEditPassword; @Override protected void onResume() { super.onResume(); FirebaseUser firebaseUs...

public class ForgotPasswordActivity extends AppCompatActivity { @BindView(R.id.tIETForgotPasswordEmail) EditText mEditEmail; private FirebaseAuth mFirebaseAuth; private FirebaseAuth.AuthStateListener mAuthStateListener; @Override protected void onCreate(Bundle saved...

public class ChangeEmailActivity extends BaseAppCompatActivity implements ReAuthenticateDialogFragment.OnReauthenticateSuccessListener { @BindView(R.id.et_change_email) EditText mEditText; private FirebaseUser mFirebaseUser; @OnClick(R.id.btn_change_email) void onChangeE...