Php bubble Sort, quick sort, quick find, two dimensional array to re-share _php tutorial

Source: Internet
Author: User
First, bubble sort
Copy CodeThe code is as follows:
Bubble sort
function Bubble_sort ($array)
{
$count =count ($array);
if ($count <= 0) {
return false;
}
for ($i =0; $i < $count; $i + +) {
for ($j =0; $j < $count-$i-1; $j + +) {
if ($array [$j] > $array [$j +1]) {
$temp = $array [$j];
$array [$j]= $array [$j +1];
$array [$j +1]= $temp;
}
}
}
return $array;
}

Second, quick sort

Copy the Code code as follows:
Quick Line
function Quick_sort ($array)
{
$count =count ($array);
if ($count <= 1) {
return $array;
}
$key = $array [0];
$array _left=array ();
$array _right=array ();
for ($i =1; $i < $count; $i + +) {
if ($array [$i] < $key) {
$array _left[]= $array [$i];
}else{
$array _right[]= $array [$i];
}
}
$array _left=quick_sort ($array _left);
$array _right=quick_sort ($array _right);
Return Array_merge ($array _left,array ($key), $array _right);
}

$myarray =array (1,5,3,4,12,10,8);
Print_r (Bubble_sort ($myarray));
echo "
";
Print_r (Quick_sort ($myarray));
echo "
";

Third, the position of the first occurrence of the quick Find value

Copy the Code code as follows:

/**
* Quick Find where the value first appears
* @param array $array arrays
* @param string $k the value to find
* @param int $low The minimum key value of the lookup range
* @param int $high The maximum key value of the range
*/
function Search ($array, $k, $low =0, $high =0)
{
Determine if the call is the first time
if (count ($array)!=0 and $high = = 0) {
$high = count ($array);
}
If the remaining array elements are still present
if ($low <= $high) {
Take the middle value of $low and $high
$mid = Intval (($low + $high)/2);
If found then returns
if ($array [$mid] = = $k) {
return $mid;
}
If it is not found, continue to find
ElseIf ($k < $array [$mid]) {
Return Search ($array, $k, $low, $mid-1);
}
else {
Return Search ($array, $k, $mid +1, $high);
}
}
return-1;
}
$array = Array (4,5,7,8,9,10,8); Test the search function
Echo Search ($array, 8); Call the search function and output the lookup results

Four, remove the two-dimensional array duplicates
Copy the Code code as follows:

/**
* Remove duplicates from two-dimensional arrays
* @param $array Array
* @param the key of the field when $keyArray restore
* @return array of duplicates is removed
*/
Public Function ARRAY_UNIQUE_FB ($array, $keyArray) {
$temp =array ();
foreach ($array 2D as $v) {
$v = Join (",", $v); Dimension, you can also convert one-dimensional array to a comma-concatenated string using implode
$temp [] = $v;
}
$temp = Array_unique ($temp); Remove duplicate strings, that is, duplicate one-dimensional arrays
foreach ($temp as $k = = $v) {
$temp [$k] = Explode (",", $v); Re-assemble the disassembled array
$temp [$k]= array_combine ($keyArray, Explode (",", Trim ($v)));
}
return $temp;
}

$testArray =ARRAY_UNIQUE_FB (Array (' A ' =>1, ' B ' =>2, ' C ' =>3),
Array (' A ' =>1, ' B ' =>2, ' C ' =>3), Array (' A ' =>1, ' B ' =>2, ' C ' =>3) '), Array (' A ', ' B ', ' C '));

Print_r ($testArray);

http://www.bkjia.com/PHPjc/760290.html www.bkjia.com true http://www.bkjia.com/PHPjc/760290.html techarticle The bubble sort copy Code code is as follows://bubble sort function Bubble_sort ($array) {$count =count ($array), if ($count = 0) {return false;} for ($i =0 ; $i $count; $i + +) {for ($j =0;

  • Related Article

    Contact Us

    The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

    If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

    A Free Trial That Lets You Build Big!

    Start building with 50+ products and up to 12 months usage for Elastic Compute Service

    • Sales Support

      1 on 1 presale consultation

    • After-Sales Support

      24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.