Numerically sorting lists

[Schlo_50]

Hello,

 

I have a short list of numbers in a file and Im trying to find the highest number from it.

 

The list looks like this: (short example)

 

none|14

none|103

none|65

 

I'd like to, if possible, find the highest number of bkey[1] and print it out on the page. I have included my code so far below. At the moment is prints nothing but 1's.

 

print "The largest number in the file is:<br /><br />";

$bfile = file("numbers.DAT");

  foreach($bfile as $bKey => $Val){
   $Data[$bKey] = explode("|", $Val);
   $none = $Data[$bKey][0];
   $number = $Data[$bKey][1];
   
$arr = array($number);
print ksort($arr);
print "<br />";

  }

 

Thanks in advance

[Schlo_50]

I have kept on trying and have come up with the following but the problem is that It only displays the last number of the list which isn't necessarily the largest number..

 

print "The largest number in the file is:<br /><br />";

$bfile = file("numbers.DAT");

  foreach($bfile as $bKey => $Val){
   $Data[$bKey] = explode("|", $Val);
   $none = $Data[$bKey][0];
   $number = $Data[$bKey][1];
   
$arr = array($number);
  }
print "Largest: ".max($arr);

[blinky001]

Try this:

 

<?php
foreach($bfile as $key => $value)
{
$tmp = explode('|', $value);
$vals[] = $tmp[1];
}

rsort($vals);

echo $vals[0].'<br />';

?>

[Schlo_50]

Thanks for the help. I tried that code and it didn't quite work after testing, although it's nearly there. I'll show you the input and output.

 

//list of numbers
none | 1 
none | 2 
none | 13 
none | 4 
none | 5 
none | 6 
none | 1010 
none | 950 
none | 93 
none | 8 
none | 11 
none | 12 
none | 3 
none | 14 
none | 16

 

//output
950

 

The output should infact be 1010 in this case

[blinky001]

Very odd, I tested it using an array and it worked fine. You may be on a different PHP version to me, so I have made two changes to the core code - give them a go.

 

<?php

print "The largest number in the file is:<br /><br />";

$bfile = array(
'none | 1',  
'none | 2', 
'none | 13',  
'none | 4', 
'none | 5',  
'none | 6', 
'none | 1010',  
'none | 950',  
'none | 93',  
'none | 8', 
'none | 11',  
'none | 12', 
'none | 3', 
'none | 14', 
'none | 16'
);

foreach($bfile as $key => $value)
{
$tmp = explode('|', $value);
$vals[] = trim($tmp[1]);
}

rsort($vals, SORT_NUMERIC);

echo $vals[0].'<br />';

[Schlo_50]

Following is not working either:

 

function BubbleSort($sort_array,$column = 0,$reverse=0)
{
  $lunghezza=count($sort_array);
  for ($i = 0; $i < $lunghezza ; $i++){
    for ($j = $i + 1; $j < $lunghezza ; $j++){
      if($reverse){
        if ($sort_array[$i][$column] < $sort_array[$j][$column]){
          $tmp = $sort_array[$i];
          $sort_array[$i] = $sort_array[$j];
          $sort_array[$j] = $tmp;
        }
      }else{
        if ($sort_array[$i][$column] > $sort_array[$j][$column]){
          $tmp = $sort_array[$i];
          $sort_array[$i] = $sort_array[$j];
          $sort_array[$j] = $tmp;
        }
      }
    }
  }
  return $sort_array;          
}


$bfile = file("numbers.DAT");

foreach($bfile as $key => $value)
{
$tmp = explode('|', $value);
$vals[] = $tmp[1];
}

$vals = BubbleSort($vals);

print $vals[1].'<br />';

[blinky001]

Really odd: I get

 

The largest number in the file is: 1010