Tag: Math

eXorithm – Execute Algorithm: View / Run Algorithm locate_country

by ToneDJCampbellin View

function locate_country ($country
{
  $data = file_get_contents"http://maps.google.com/maps/geo?output=csv&q="urlencode$country));
  $arr = explode",", $data);
  if (count$arr)>=4) {
    if ($arr[0]==200) {
      return array'latitude'=>$arr[2], 'longitude'=>$arr[3]);
    } else {
      throw new Exception'Country could not be geocoded');
    }
  } else {
    throw new Exception'Country could not be geocoded');
  }
} 

eXorithm – Execute Algorithm: Discuss Algorithm sort_multi_array

by ToneDJCampbellin Comment

sort_multi_array     version 0.1     Sort a two-dimensional array by one (or more) of the elements in the nested arrays. Accepts a variable number of arguments.Subject: Usage Example for sort_multi_array would be useful

optionzz posted: Jan 2, 2014 08:02 pm [reply]

I have a TOUGH time wrapping my head around the strange php array design. All I need to do is use a matrix with numeric indexes for each dimension. Somehow, EVERY example uses names for the "columns" in the second index. If I want that, I’ll use SQL.

Sorry, complaining won’t help. I’d love to see how this would work for a normal 2 dim array like
0 1 2 3
0 (0,0) (0,1) (0,2) (0,3)

2

4 (4,0) (4,1) (4,2) (4,4)

I want to sort all 5 rows based on any of the column NUMBERS (there are no names).

I’m pretty new to PHP but not to programming. Perhaps someone could help break the logjam in my head that REFUSES to understand arrays inside arrays with names instead of numbers, but most importantly, how to make the sort work!
Thanks.

Subject: Usage Example for sort_multi_array would be useful

optionzz posted: Jan 2, 2014 07:58 pm [reply]

I have a TOUGH time wrapping my head around the strange php array design. All I need to do is use a matrix with numeric indexes for each dimension. Somehow, EVERY example uses names for the "columns" in the second index. If I want that, I’ll use SQL.

Sorry, complaining won’t help. I’d love to see how this would work for a normal 2 dim array like
0 1 2 3
0 0,0 0,1 0,2 0,3
1 1,0 1,2…


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eXorithm – Execute Algorithm: View / Run Algorithm invert_image

by ToneDJCampbellin View

function invert_image ($image
{
  $image_width = imagesx$image);
  $image_height = imagesy$image);
  
  // if the image is not true color, make it so
  if (!imageistruecolor$image)) {
    $image2 = imagecreatetruecolor$image_width, $image_height);
    imagecopy$image2$image,0,0,0,0,$image_width$image_height);
    $image = $image2
  }
  
  // loop through all the pixels
  for ($h = 0; $h < $image_height; $h++) {
    for ($w = 0; $w < $image_width; $w++) {
      // get the color at this pixel
      $color = imagecolorsforindex$image, imagecolorat$image, $w, $h));
      // invert the color
      $color'red'] = 255 - $color'red'];
      $color'green'] = 255 - $color'green'];
      $color'blue'] = 255 - $color'blue'];
      // create the new color
      $new_color = imagecolorallocate$image, $color'red'], $color'green'], $color'blue']);
      // set the color
      imagesetpixel$image, $w, $h, $new_color);
    }
  }
  
  return $image
} 

eXorithm – Execute Algorithm: Discuss Algorithm magic8ball

by ToneDJCampbellin Comment

magic8ball     version 0.2     Ask the magic 8 ball your question.Subject: magic8ball

Haldan posted: Feb 22, 2012 04:57 am [reply]

function magic8ball() {
$answers = array(‘It is certain’, ‘It is decidedly so’, ‘Without a doubt’,
‘Yes – definitely’, ‘You may rely on it’, ‘As I see it, yes’,
‘ Most likely’, ‘Outlook good’, ‘Signs point to yes’, ‘Yes’,
‘Reply hazy, try again’, ‘Ask again later’,
‘Better not tell you now’, ‘Cannot predict now’,
‘Concentrate and ask again’, ‘Dont bet on it’,
‘My reply is no’, ‘My sources say no’, ‘Outlook not so good’,
‘Very doubtful’ );
$index = rand(0, count($answers));
return ($answers[$index]);

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