Tutorial by Examples: n

from bs4 import BeautifulSoup import requests main_url = "https://fr.wikipedia.org/wiki/Hello_world" req = requests.get(main_url) soup = BeautifulSoup(req.text, "html.parser") # Finding the main title tag. title = soup.find("h1", class_ = "firstHeading&qu...

import time def timer(func): def inner(*args, **kwargs): t1 = time.time() f = func(*args, **kwargs) t2 = time.time() print 'Runtime took {0} seconds'.format(t2-t1) return f return inner @timer def example_function(): #do stuff exa...

Vertical Index Match =INDEX(A1:A3,MATCH(E2,C1:C3,0))

Horizontal Index Match =INDEX(A1:C1,MATCH(E2,A3:C3,0))

Hiding Softkeyboard is a basic requirement usually when working with EditText. The softkeyboard by default can only be closed by pressing back button and so most developers use InputMethodManager to force Android to hide the virtual keyboard calling hideSoftInputFromWindow and passing in the token o...

Ext.define('App.Duck', { extend: 'Ext.Component', alias: 'widget.duck', initComponent: function () { this.callParent(arguments); this._quack(); }, _quack: function () { console.log('The duck says "Quack!"'); this.fireEvent('quack...

// gets the Class objects from the net.mminecraft.server package with the given name public Class<?> getNmsClass(String name) throws ClassNotFoundException { // explode the Server interface implementation's package name into its components String[] packageArray = Bukkit.getServer()....

Touch events related to a Button can be checked as follows: public class ExampleClass extends Activity implements View.OnClickListener, View.OnLongClickListener{ public Button onLong, onClick; @Override public void onCreate(Bundle sis){ super.onCreate(sis); setCon...

public class CustomSurfaceView extends SurfaceView { @Override public boolean onTouchEvent(MotionEvent e) { super.onTouchEvent(e); if(e.getPointerCount() > 2){ return false; // If we want to limit the amount of pointers, we return false //...

A splash screen is just like any other activity, but it can handle all of your startup-needs in the background. Example: Manifest: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="...

There is more than one way to do it: Using the package manager: sudo apt install perl Installing from source: wget http://www.cpan.org/src/5.0/perl-version.tar.gz tar -xzf perl-version.tar.gz cd perl-version ./Configure -de make make test make install Installing in your $h...

As we said before, we go with the open-source version. For Windows you can choose strawberry or DWIM. Here we cover the strawberry version, since DWIM is based on it. The easy way here is installing from the official executable. See also berrybrew - the perlbrew for Windows Strawberry Perl

NLTK provides the FreqDist class that let's us easily calculate a frequency distribution given a list as input. Here we are using a list of part of speech tags (POS tags) to see which lexical categories are used the most in the brown corpus. import nltk brown_tagged = nltk.corpus.brown.tagged_w...

A function is defined by at least its return type and an unique name. void say_hello () { print ("Hello, world!\n"); } Then, to call it just use the name of the function followed by a parenthese. say_hello (); Functions can also have parameters between the parentheses, d...

Parameters can be marked as optional by giving them a default value. Optional parameters can be omitted when calling the function. string greet (string name, string language = "English") { if (language == "English") { return @"Hello, $name!"; } else ...

Value types (structures and enumerations) are passed by value to functions: a copy will be given to the function, not a reference to the variable. So the following function won't do anything. void add_three (int x) { x += 3; } int a = 39; add_three (a); assert (a == 39); // a is still 39...

You can assert that parameters have certain values with requires. int fib (int i) requires (i > 0) { if (i == 1) { return i; } else { return fib (i - 1) + fib (i - 2); } } fib (-1); You won't get any error during the compilation, but you'll get an error wh...

int sum (int x, ...) { int result = x; va_list list = va_list (); for (int? y = list.arg<int?> (); y != null; y = list.arg<int?> ()) { result += y; } return result; } int a = sum (1, 2, 3, 36); With this function, you can pass as many int as you w...

A key part of the Reader monad is the ask (https://hackage.haskell.org/package/mtl-2.2.1/docs/Control-Monad-Reader.html#v:ask) function, which is defined for illustrative purposes: import Control.Monad.Trans.Reader hiding (ask) import Control.Monad.Trans ask :: Monad m => ReaderT r m r ask ...

This is an official MATLAB example Consider the following code: month = [1;1;2;3;8;1;3;4;9;11;9;12;3;4;11]; temperature = [57;61;60;62;45;59;64;66;40;56;38;65;61;64;55]; maxTemp = accumarray(month,temperature,[],@max); The image below demonstrates the computation process done by accumarray in...