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Before Java 8, there was DateFormat and SimpleDateFormat classes in the package java.text and this legacy code will be continued to be used for sometime. But, Java 8 offers a modern approach to handling Formatting and Parsing. In formatting and parsing first you pass a String object to DateTimeFor...

Packages are collections of R functions, data, and compiled code in a well-defined format. Public (and private) repositories are used to host collections of R packages. The largest collection of R packages is available from CRAN. Some of the most popular R machine learning packages are the following...

Let's say, we have an array: Item = {-1, 0, 3, 6}. We want to construct SegmentTree array to find out the minimum value in a given range. Our segment tree will look like: The numbers below the nodes show the indices of each values that we'll store in our SegmentTree array. We can see that, to sto...

Import libraries (language dependency: python 2.7) import tensorflow as tf import numpy as np from sklearn.datasets import fetch_mldata from sklearn.model_selection import train_test_split load data, prepare data mnist = fetch_mldata('MNIST original', data_home='./') print "MNIST data,...

Collection Operators can be used in a KVC key path to perform an operation on a “collection-type” property (i.e. NSArray, NSSet and similar). For example, a common operation to perform is to count the objects in a collection. To achieve this, you use the @count collection operator: self.array = @[@...

In C++, code must be declared or defined before usage. For example, the following produces a compile time error: int main() { foo(2); // error: foo is called, but has not yet been declared } void foo(int x) // this later definition is not known in main { } There are two ways to resolve...

This example will guide you how to get playlist data using the YouTube Data API on Android. SHA-1 fingerprint First you need to get an SHA-1 fingerprint for your machine. There are various methods for retrieving it. You can choose any method provided in this Q&A. Google API console and YouTub...

Here a Turtle Graphics Ninja Twist: import turtle ninja = turtle.Turtle() ninja.speed(10) for i in range(180): ninja.forward(100) ninja.right(30) ninja.forward(20) ninja.left(60) ninja.forward(50) ninja.right(30) ninja.penup() ninja.setposit...

type Props = { posts: Array<Article>, dispatch: Function, children: ReactElement } const AppContainer = ({ posts, dispatch, children }: Props) => ( <div className="main-app"> <Header {...{ posts, dispatch }} /> {children} </...

Files written to with the w command are created/truncated before any commands are run. $ sed 'w created-file' < /dev/null && ls created-file && rm created-file created-file From the standard: Each wfile shall be created before processing begins. Implementations shall suppo...

Up navigation is done in android by adding android:parentActivityName="" in Manifest.xml to the activity tag. Basically with this tag you tell the system about the parent activity of a activity. How is it done? <uses-permission android:name="android.permission.INTERNET" ...

Implementation of the Caesar cipher. This implementation performs the shift operation only on upper and lower case alphabets and retains the other characters (such as space as-is). The Caesar cipher is not secure as per current standards. Below example is for illustrative purposes only ! Refer...

The following code example implements the Caesar cipher and shows the properties of the cipher. It handles both uppercase and lowercase alpha-numerical characters, leaving all other characters as they were. The following properties of the Caesar cipher are shown: weak keys; low key space; the...

To create an explosion, the following method signatures may be used: boolean createExplosion(double x, double y, double z, float power); boolean createExplosion(double x, double y, double z, float power, boolean setFire); boolean createExplosion(double x, double y, double z, float power, ...

The following methods can be used to generate a tree naturally (as if it was grown from a sapling) into the world. boolean generateTree(Location loc, TreeType type); boolean generateTree(Location loc, TreeType type, BlockChangeDelegate delegate); Location is where you want the tree to spawn ...

Let's say, you have already created a segment tree. You are required to update the values of the array, this will not only change the leaf nodes of your segment tree, but also the minimum/maximum in some nodes. Let's look at this with an example: This is our minimum segment tree of 8 elements. To...

XmlView: <mvc:View controllerName="sap.m.sample.ListCounter.List" xmlns:mvc="sap.ui.core.mvc" xmlns="sap.m"> <List headerText="Products" items="{products>/Products}"> <!-- Template of ...

In normal mode: gg go to top = then G

To update a specific program: sudo pacman -S <programName> To update entire the system: sudo pacman -Syu

New repository can be created with two different options: 1. Using command line Execute following command. It will create a directory for the repository, but parent path has to be present. i.e. in the following example, /var/svn should already be there, while it will create my_repository directory...