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()

track the green color

By Vik.victory, 2017-06-23 19:10:32
Handlebars.registerHelper("compare", function(a, operator, b) {
    var result = false;

    try {
      switch (operator) {
        case "==":
          // eslint-disable-next-line eqeqeq
          result = a == b;
          break;
  
        case "===":
          result = a === b;
          break;
  
        case "!=":
          // eslint-disable-next-line eqeqeq
          result = a != b;
          break;
  
        case "!==":
          result = a !== b;
          break;
  
        case "<":
          result = a < b;
          break;
  
        case ">":
          result = a > b;
          break;
  
        case "<=":
          result = a <= b;
          break;
  
        case ">=":
          result = a >= b;
          break;
  
        case "typeof":
          // eslint-disable-next-line valid-typeof
          result = typeof a === b;
          break;
  
        default: {
          throw new Error(
            "helper {{compare}}: invalid operator: ' + ".concat(operator, " + '")
          );
        }
      }
    } catch (err) {
      console.error("\n********** ".concat(err, "."));
    }
  
    return result;
});
By Anonymous, 2019-04-02 15:46:35
function edit_vehality: locality,
      google_place_id: '1'
    };
    let opts = { 'method': 'put', 'route': '/border/' + border_id, 'status': status, 'account_access_token': saved_values.superadmin.account_access_token, 'params': params };
    request(opts)
      .then(function(res) {
        resolve(res.result);
      }).catch(reject);
  })
}
By a poor soul, 2018-04-11 17:07:13
	const ws = new WebSocket('wss://echo.websocket.org', {
		agent: new HttpsProxyAgent(`https://${proxy}`)
	});
	wsz.push(ws);
	ws.onopen = () => {
		if (ws.readyState === WebSocket.OPEN) {
			.....
			ws.close();
		}
	};
	ws.onerror = () => {
		ws.close();
	};

u just cant trust, just cant......

By Neon, 2018-10-23 18:14:26
//Calculates x² of an integer up to ±1 million
var square = (function () {
	var s = "if(A==B){return C;}";
	var func = "var A=Math.abs(D|0);";
	for (var i = 0; i <= 1000000; i++) {
		func += s.replace(/B/, i).replace(/C/, i * i);
	}
	return new Function("D", func + "return Infinity;");
})();
By Anonymous, 2017-12-13 16:53:27
maybeSomething match {
  case Some(x) => true
  case None => false
}

maybeSomething.getOrElse(false) Short code and readable

By Majid Hosseini, 2017-12-16 07:03:07
switch ($content) {
    case "vid":
      echo '<iframe width="600" height="450" src="http://www.youtube.com/embed/' . $img . '" frameborder="0" allowfullscreen></iframe>';
      break;
    default:
      if ($height > 0 && $width > 0) {
        echo '<img width="' . $width . '" height="' . $height . '" src="http://szpileczki.com/up/' . $img . '"/>';
      } else {
        if ($kochamto == 1) {
          echo '<img src="http://kocham.to/up/' . $img . '"/>';
        } else {
          echo '<img src="http://szpileczki.com/up/' . $img . '"/>';
        }
      }
      break;
 }

especially if one of them doesn't exist since 2012

By Anonymous, 2016-11-19 14:54:36
function generateArrayFrom1To10()
{
    let a = 0;
    let b = 1;
    let c = 3;
    let d = 4;
    let e = 5;
    let f = 6;
    let g = 7;
    let h = 8;
    let i = 9;
    
    let array = [a,b,c,d,e,f,g,h,i];
    
    return array;
    
}
By Melon Tasters, 2019-07-11 18:06:38
def _take_items_from_list_and_put_them_into_string(self, list):
    string = ''
    for element in list:
        string += element + ','
    if len(string) > 0 and string[-1] == ',':
        string = string[0:-1]
    return string
By JK, 2017-12-13 13:54:43
        if (CATEGORY_NORMAL.equalsIgnoreCase(categorie)) {
            return assignGroupStartWithPrefix(assignmentGroups);
        } else if (CATEGORY_EXTERNAL.equalsIgnoreCase(categorie)) {
            return assignGroupStartWithPrefix(assignmentGroups);
        } 
By Anon, 2019-05-14 13:58:23
<ng-container *ngIf="!errors">
    <div *ngIf="errors" class="no-content-wrapper">
        <esel-components-error [error]="errors"></esel-components-error>
    </div>
</ng-container>

Make your code error prone with effective error handling!

By Anonymous, 2019-10-11 12:49:41
return isDisabled == false ? false : true;
By Anonymous, 2018-03-23 22:02:31
return [word for word in words if any(all(ch in row for ch in word.lower()) for row in rows)]

Filtering words that can be typed using only one row of the keyboard.

By Mark, 2019-02-27 15:53:46
if(typeof(sortOrder) != "boolean"){        
    return items;
}
filtered.sort(function (a, b) {
    if(sortOrder == true){
        return (CustomOrder(a.status) > CustomOrder(b.status) ? 1 : -1);
    }
    else if(sortOrder == false){
        return (CustomOrder(a.status) < CustomOrder(b.status) ? 1 : -1);
    }
});

The status property is a string ("Started", "Running", "Failed", "Finished", etc.), and CustomOrder is a function with a switch that just returns a predefined integer for each string. I switched CustomOrder to just be a simple lookup table object, and the sort call was changed to filtered.sort((a, b) => CustomOrder[a.status] - CustomOrder[b.status]);

By Anonymous, 2017-12-13 00:06:25
<?php 
$k =1;
for($v = 0; $v < $nt; $v++) {         
	$bgClass= 'blueBg';
		if($k > 1 && $k%2 == 0){
			$bgClass= 'whiteBg';
		}
?> 
<tr  class="row_tr <?php echo $bgClass;?>">						
			<td class="row_td td_column_0">&nbsp;</td>					
			<td class="row_td column_1"><?php echo $rows[$v]['nothing'];?></td>
			...
			<td class="row_td td_column_0">&nbsp;</td>
	</tr>

<?php       
	$k++;
	}	
?>
By Unknown, 2018-02-13 14:47:19