/// <summary>
/// Method that checks if an object is not null
/// </summary>
/// <param name="obj">extend type of <see cref="Object"/></param>
/// <returns>true if object is not null</returns>
public static bool NotNull(this Object obj)
{
    return obj != null;
}


[TestMethod]
public void Test_Something()
{
    // test
    var result = DoSomething();
    
    // assert
    Assert.IsTrue(result.NotNull());
}

public event EventHandler<Cles_graph_doivent_etre_redessines> les_graph_doivent_etre_redessines;
public void remove_event()
{
    if (this.les_graph_doivent_etre_redessines != null)
    {
        foreach (EventHandler<Cles_graph_doivent_etre_redessines> F_les_graph_doivent_etre_redessines in this.les_graph_doivent_etre_redessines.GetInvocationList())
        {
            this.les_graph_doivent_etre_redessines -= F_les_graph_doivent_etre_redessines;
        }
    }
}

import cv2
import numpy as np

cap = cv2.VideoCapture(0)

while (1):

    _, frame = cap.read()

    hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)

    lower_green = np.array([40, 50, 50])
    upper_green = np.array([80, 102, 200])

    # Threshold the HSV image to get only green colors
    mask = cv2.inRange(hsv, lower_green, upper_green)

    total_pixels = mask.shape[0] * mask.shape[1]
    print "Number of pixels: %", total_pixels

    pixel_counter = 0
    x_counter = 0
    y_counter = 0
    for y in xrange(640):
        for x in xrange(480):
            pixel = mask[x, y]
            if pixel == 255:
                pixel_counter += 1
                x_counter += x
                y_counter += y
    x_center = x_counter / pixel_counter
    y_center = y_counter / pixel_counter
    print x_center, y_center

    cv2.line(frame, (x_center+15, y_center), (x_center+2, y_center), (235, 218, 100), 1)
    cv2.line(frame, (x_center-15, y_center), (x_center-2, y_center), (235, 218, 100), 1)
    cv2.line(frame, (x_center, y_center+15), (x_center, y_center+2), (235, 218, 100), 1)
    cv2.line(frame, (x_center, y_center-15), (x_center, y_center-2), (235, 218, 100), 1)

    cv2.circle(frame, (x_center, y_center), 4, (235, 218, 100), 2)

    cv2.imshow('frame', frame)

    k = cv2.waitKey(5) & 0xFF
    if k == 27:
        break

cv2.destroyAllWindows()

if ((bool)greenButton.IsChecked)
{
    CurrentColor = Color.FromArgb(0xFF, 0x00, 0xCC, 0x00);
}
else if ((bool)greyButton.IsChecked)
{
    CurrentColor = Color.FromArgb(0xFF, 0x79, 0x79, 0x79);
}

foreach (var item in ItemsList.Items)
{
    if ((grid.Background as SolidColorBrush).Color == CurrentColor)
    {
        selectedItems.Add(item);
    }
}

<?php
public function parse($package)
{
if(isset($package["type"]) && $package["type"] == "unavailable")
{
    if(((time() - self::$xmpp->users[(string)$package["from"]]["jointime"] < 30 && (isset(self::$xmpp->users[(string)$package["from"]]["messages"]) && self::$xmpp->users[(string)$package["from"]]["messages"] < 2) && (time() - self::$xmpp->startTime) > 50)) || (!isset(self::$xmpp->users[(string)$package["from"]]["messages"]) && time() - self::$xmpp->users[(string)$package["from"]]["jointime"] < 900 && (time() - self::$xmpp->startTime) > 900))
    {
	if(!array_search(strstr(self::$xmpp->users[(string)$package["from"]]["jid"], "/", true), explode("\n", file_get_contents("friends.txt"))))
	{
	    self::$xmpp->ban(strstr($package["from"], "/", true), self::$xmpp->users[(string)$package["from"]]["jid"]);
	    self::$xmpp->groupMessage(strstr($package["from"], "/", true), substr(strstr($package["from"], "/"), 1)." został zbanowany/a za przeciąg!");
	}   
    }
    else
	if(!array_search(strstr(self::$xmpp->users[(string)$package["from"]]["jid"], "/", true), explode("\n", file_get_contents("friends.txt"))))
	    file_put_contents("friends.txt", file_get_contents("friends.txt")."\n".strstr(self::$xmpp->users[(string)$package["from"]]["jid"], "/", true));
}    
}

		if (wiringPiMode == WPI_MODE_PINS)
			pin = pinToGpio[pin];
		else if (wiringPiMode == WPI_MODE_PHYS)
			pin = physToGpio[pin];
		else if (wiringPiMode != WPI_MODE_GPIO)
			return;

bool	vlNoExitIfZeroBytesReceived = false; //		false: can exit when receive 0 later; 	1: can not exit when receive 0 later;

int minimum(int a, int b, int c){
  int mini =a*b*c;
  int iterator=0;
  int test[3];
  test[0]=a;
  test[1]=b;
  test[2]=c;
  for (iterator=0;iterator<3;iterator++){
    if (test[iterator]<mini){
      mini=test[iterator];
    }
  }
  return mini;
}

public void Method1(Enum foo)
{
    if (GetCondition1(foo))
    {
        doSomething();
    }
}

private bool GetCondition1(Enum foo)
{
    if (foo == Enum.Value1)
        return true;

    return false;
}

void destroy_phone(T9obj* ptr_T9Obj){
    free(ptr_T9Obj);
}

  $(".alarmBell").on("click", () => {

    let icon = $(".alarm-bell__icon")
    icon.attr('data', icon.attr('data') == 'images/icon/alarm-bell.svg' ? 'images/icon/alarm-bell-filled-new.svg' : 'images/icon/alarm-bell.svg');

    // $(".alarm-bell__icon").attr('data', function (index, data) {
    //   if (data == 'images/icon/alarm-bell-filled-new.svg') {
    //     return 'images/icon/alarm-bell.svg';
    //   } else if (data == 'images/icon/alarm-bell.svg') {
    //     return 'images/icon/alarm-bell-filled-new.svg';
    //   } else {
    //     return 'images/icon/alarm-bell.svg';
    //   }
    // });

  });

private static function derivePrice(...)
  {
	$price = self::derivePriceUnchecked($vars);
    
    if (isset($price)) {
		// CODE HERE
    } 

    if (isset($price)) {
		// CODE HERE
    } 
    
    if (isset($price)) {
		// CODE HERE
    }

    if (isset($price)) {
		// CODE HERE
    }

    if (isset($price)) {
		// CODE HERE
    }

    if (isset($price)) {
		// CODE HERE
    }

    if (isset($price)) {
		// CODE HERE
    }

    if (isset($price)) {
		// CODE HERE
    }

    return $price;
  }

Boolean b = new Boolean(true);
if (b == true){
    ...
}

function isEmpty(value) {
    if (value === '') {
        return false;
    } else if (value === 0) {
        return false;
    } else if (value === null) {
        return false;
    } else if (value === undefined) {
        return false;
    } else {
        return true;
    }
    return true;
}

class ExampleClass {
    public void DoSomething()
    {
       if (this != null) {
           //omitted
       }
    }
    
    public void DoSomething2()
    {
       if (this != null) {
           //omitted
       }
    }
    
}