encoding := base64.StdEncoding
data := []byte(`Zm9vIGJhcg==`)
decoded := make([]byte, encoding.DecodedLen(len(data)))
n, err := encoding.Decode(decoded, data)
if err != nil {
log.Fatal(err)
}
// Because we don't know the length of the data that is encoded
// (only the max length), we n...
The entries() method returns a new Array Iterator object that contains the key/value pairs for each index in the array.
6
var letters = ['a','b','c'];
for(const[index,element] of letters.entries()){
console.log(index,element);
}
result
0 "a"
1 "b"
2 "c"...
Knitr is an R package that allows us to intermingle R code with LaTeX code. One way to achieve this is inline code chunks. This apporach is demonstrated below.
# r-noweb-file.Rnw
\documentclass{article}
\begin{document}
This is an Rnw file (R noweb). It contains a combination of LateX and ...
Knitr is an R package that allows us to intermingle R code with LaTeX code. One way to achieve this is internal code chunks. This apporach is demonstrated below.
# r-noweb-file.Rnw
\documentclass{article}
\begin{document}
This is an Rnw file (R noweb). It contains a combination of LateX a...
Mixins are a sort of class that is used to "mix in" extra properties and methods into a class. This is usually fine because many times the mixin classes don't override each other's, or the base class' methods. But if you do override methods or properties in your mixins this can lead to une...
/**
* Explain briefly what method does here
* @param x Explain briefly what should be x and how this affects the method.
* @param y Explain briefly what should be y and how this affects the method.
* @return Explain what is returned from execution.
*/
def method(x: Int, y: String): O...
You can place an SKCameraNode into an SKScene to define which part of the scene is shown in the SKView. Think of the SKScene as a 2D world with a camera floating above it: the SKView will show what the camera 'sees'.
E.g. the camera could be attached to the main character's sprite to follow the act...
Mapping
Applying a function to all elements of an array :
array_map('strtoupper', $array);
Be aware that this is the only method of the list where the callback comes first.
Reducing (or folding)
Reducing an array to a single value :
$sum = array_reduce($numbers, function ($carry, $number) {
...
MySQL offers a number of different numeric types. These can be broken down into
GroupTypesInteger TypesINTEGER, INT, SMALLINT, TINYINT, MEDIUMINT, BIGINTFixed Point TypesDECIMAL, NUMERICFloating Point TypesFLOAT, DOUBLEBit Value TypeBIT
The easiest and quickest way to encode a Haskell data type to JSON with Aeson is using generics.
{-# LANGUAGE DeriveGeneric #-}
import GHC.Generics
import Data.Text
import Data.Aeson
import Data.ByteString.Lazy
First let us create a data type Person:
data Person = Person { firstName :...
If you want to extract something from a webpage (or any representation/programming language), a regex is the wrong tool for the task. You should instead use your language's libraries to achieve the task.
If you want to read HTML, or XML, or JSON, just use the library that parses it properly and ser...
EntityFramewok Fluent API is a powerful and elegant way of mapping your code-first domain models to underlying database. This also can be used with code-first with existing database. You have two options when using Fluent API: you can directly map your models on OnModelCreating method or you can cre...
A pointer is declared much like any other variable, except an asterisk (*) is placed between the type and the name of the variable to denote it is a pointer.
int *pointer; /* inside a function, pointer is uninitialized and doesn't point to any valid object yet */
To declare two pointer variables...
The complete sample code for this application (Android + Node server) is available in the PayPal Developer Github repository.
From step 2, an async request has been made to our server at the /fpstore endpoint, passing along the auth code and metadata ID. We now need to exchange those for a token in...
XSD schema (schema.xsd)
The following xml schema (xsd) defines a list of users with attributes name and reputation.
<?xml version="1.0"?>
<xs:schema version="1.0"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:ns="http://www...
Extension methods can be used to "hide" processing of inelegant business rules that would otherwise require cluttering up a calling function with if/then statements. This is similar to and analogous to handling nulls with extension methods. For example,
public static class CakeExtensions
...
Linux running systemd, like Ubuntu 16.04, adding -H tcp://0.0.0.0:2375 to /etc/default/docker does not have the effect it used to.
Instead, create a file called /etc/systemd/system/docker-tcp.socket to make docker available on a TCP socket on port 4243:
[Unit]
Description=Docker Socket for the AP...
By default, a new class module is a Private class, so it is only available for instantiation and use within the VBProject in which it is defined. You can declare, instantiate and use the class anywhere in the same project:
'Class List has Instancing set to Private
'In any other module in the SAME ...
