۳۲ تمرین PHP قسمت سوم

vert_mirror(s) => "dcba\nhgfe\nlkji\nponm"

 hor_mirror(s) => "mnop\nijkl\nefgh\nabcd"

s = "abcd\nefgh\nijkl\nmnop"
oper(vert_mirror, s) => "dcba\nhgfe\nlkji\nponm"
oper(hor_mirror, s) => "mnop\nijkl\nefgh\nabcd"

<?php

function vertMirror($s)
{
    // How to explode a multi-line string?
    // https://stackoverflow.com/questions/6162912/how-to-explode-a-multi-line-string
    return implode("\n", array_reverse(explode("\n", strrev($s))));
}
function horMirror($s)
{
    return implode("\n", array_reverse(explode("\n", $s)));
}
function oper($fct, $s)
{
    if ($fct == 'horMirror')
        return horMirror($s);
    else
        return vertMirror($s);
}
echo "<pre>";
  print_r(oper('horMirror', "abcd\nefgh\nijkl\nmnop\n"));
echo "</pre>";

rot(s) => "ponm\nlkji\nhgfe\ndcba"

selfie_and_rot(s) =>
"abcd....\nefgh....\nijkl....\nmnop....\n....ponm\n....lkji\n....hgfe\n....dcba"

s = "abcd\nefgh\nijkl\nmnop"
oper(rot, s) => "ponm\nlkji\nhgfe\ndcba"
oper(selfie_and_rot, s) => "abcd....\nefgh....\nijkl....\nmnop....\n....ponm\n....lkji\n....hgfe\n....dcba"

<?php

function rot($s)
{
    return strrev($s);
}
function selfieAndRot($s)
{
    $z = explode("\n", ($s));
    $dots = str_repeat(".", count($z));
    foreach ($z as $valuel) {
        $zz1[] = ($valuel . $dots);
    }
    $aa = explode("\n", strrev($s));
    foreach ($aa as $valuel) {
        $zz2[] = ($dots . $valuel);
    }
    return implode("\n", $zz1) . "\n" . implode("\n", $zz2);
}
function oper($fct, $s)
{
    if ($fct == 'rot')
        return rot($s);
    else
        return selfieAndRot($s);
}
echo "<pre>";
  print_r(oper('selfieAndRot', "hSgdHQ\nHnDMao\nClNNxX\niRvxxH\nbqTVvA\nwvSyRu"));
echo "</pre>";

diag_1_sym(s) => "aeim\nbfjn\ncgko\ndhlp"

rot_90_clock(s) => "miea\nnjfb\nokgc\nplhd"

s = "abcd\nefgh\nijkl\nmnop" --> 
"abcd|aeim\nefgh|bfjn\nijkl|cgko\nmnop|dhlp"

<?php

function diag1Sym($s)
{
    $a = explode("\n", $s);
    foreach ($a as $key => $value) {
        foreach ($a as $keya => $valuea) {
            $zz1[$key][$keya] = $a[$keya][$key];
        }
    }
    foreach ($zz1 as $value) {
        $output[] = implode('', $value);
    }
    return implode("\n", $output);
}
function rot90Clock($s)
{
    $s = diag1Sym($s);
    return implode("\n", array_reverse(explode("\n", strrev($s))));
}
function selfieAndDiag1($s)
{
    $a = explode("\n", $s);
    $imp = explode("\n", diag1Sym($s));
    foreach ($a as $key => $value) {
        $output2[$key] = $a[$key] . "|" . $imp[$key];
    }
    return implode("\n", $output2);
}
function oper($fct, $s)
{
    return $fct($s);
}
echo "<pre>";
  print_r(oper('selfieAndDiag1', "abcd\nefgh\nijkl\nmnop"));
echo "</pre>";

diag_2_sym(s) => "plhd\nokgc\nnjfb\nmiea"

rot_90_counter(s)=> "dhlp\ncgko\nbfjn\naeim"

s = "abcd\nefgh\nijkl\nmnop" --> 
"abcd|plhd|dhlp\nefgh|okgc|cgko\nijkl|njfb|bfjn\nmnop|miea|aeim"

<?php

function transpose($array)
{
    array_unshift($array, null);
    return call_user_func_array('array_map', $array);
}
function rot90Counter($s)
{
    $m = transpose(array_map("str_split", array_map("strrev", explode("\n", $s))));
    return implode("\n", array_map(function ($x) {
        return implode("", $x);
    }, $m));
}
function diag2Sym($s)
{
    return implode("\n", array_map("strrev", explode("\n", rot90Counter($s))));
}
function selfieDiag2Counterclock($s)
{
    $ts = explode("\n", $s);
    $tDiag = explode("\n", diag2Sym($s));
    $stcounter = explode("\n", rot90Counter($s));
    $result = [];
    for ($i = 0; $i < count($ts); $i++) {
        $result[$i] = $ts[$i] . "|" . $tDiag[$i] . "|" . $stcounter[$i];
    }
    return implode("\n", $result);
}
function oper($fct, $s)
{
    return $fct($s);
}
echo "<pre>";
  print_r(oper('selfieDiag2Counterclock', "abcd\nefgh\nijkl\nmnop"));
echo "</pre>";

arrayDiff([1,2],[1]) == [2]

arrayDiff([1,2,2,2,3],[2]) == [1,3]

<?php

function arrayDiff($a, $b)
{
    return array_values(array_diff($a, $b));
}
echo "<pre>";
  print_r(arrayDiff([1, 2, 2, 2, 3, 3], [2]));
echo "</pre>";

<?php

$a=array("Name"=>"Peter","Age"=>"41","Country"=>"USA");
print_r(array_values($a));

array_values(array)

<?php

$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("e"=>"red","f"=>"green","g"=>"blue");
$result=array_diff($a1,$a2);
echo "<pre>";
  print_r($result);
echo "</pre>";

array_diff(array1, array2, array3, ...)

<?php

function spinWords(string $str)
{
    return preg_replace_callback('/\w{5,}/', function ($matches) {
        return strrev($matches[0]);
    }, $str);
}
echo spinWords(" is currently unable to handle this request.");

<?php

function dashatize(int $num): string
{
    return trim(str_replace('--', '-', preg_replace('/([13579])/', '-$1-', $num)), '-');
}
echo dashatize(124434568789);

str_replace(find,replace,string,count)

<?php

echo str_replace("world","Peter","Hello world!");

<?php

$data1 =
"Rome:Jan 81.2,Feb 63.2,Mar 70.3,Apr 55.7,May 53.0,Jun 36.4,Jul 17.5,Aug 27.5,Sep 60.9,Oct 117.7,Nov 111.0,Dec 97.9\n"
. "London:Jan 48.0,Feb 38.9,Mar 39.9,Apr 42.2,May 47.3,Jun 52.1,Jul 59.5,Aug 57.2,Sep 55.4,Oct 62.0,Nov 59.0,Dec 52.9\n"
. "Paris:Jan 182.3,Feb 120.6,Mar 158.1,Apr 204.9,May 323.1,Jun 300.5,Jul 236.8,Aug 192.9,Sep 66.3,Oct 63.3,Nov 83.2,Dec 154.7\n"
. "NY:Jan 108.7,Feb 101.8,Mar 131.9,Apr 93.5,May 98.8,Jun 93.6,Jul 102.2,Aug 131.8,Sep 92.0,Oct 82.3,Nov 107.8,Dec 94.2\n"
. "Vancouver:Jan 145.7,Feb 121.4,Mar 102.3,Apr 69.2,May 55.8,Jun 47.1,Jul 31.3,Aug 37.0,Sep 59.6,Oct 116.3,Nov 154.6,Dec 171.5\n"
. "Sydney:Jan 103.4,Feb 111.0,Mar 131.3,Apr 129.7,May 123.0,Jun 129.2,Jul 102.8,Aug 80.3,Sep 69.3,Oct 82.6,Nov 81.4,Dec 78.2\n"
. "Bangkok:Jan 10.6,Feb 28.2,Mar 30.7,Apr 71.8,May 189.4,Jun 151.7,Jul 158.2,Aug 187.0,Sep 319.9,Oct 230.8,Nov 57.3,Dec 9.4\n"
. "Tokyo:Jan 49.9,Feb 71.5,Mar 106.4,Apr 129.2,May 144.0,Jun 176.0,Jul 135.6,Aug 148.5,Sep 216.4,Oct 194.1,Nov 95.6,Dec 54.4\n"
. "Beijing:Jan 3.9,Feb 4.7,Mar 8.2,Apr 18.4,May 33.0,Jun 78.1,Jul 224.3,Aug 170.0,Sep 58.4,Oct 18.0,Nov 9.3,Dec 2.7\n"
. "Lima:Jan 1.2,Feb 0.9,Mar 0.7,Apr 0.4,May 0.6,Jun 1.8,Jul 4.4,Aug 3.1,Sep 3.3,Oct 1.7,Nov 0.5,Dec 0.7";
$data2 =
    "Rome:Jan 90.2,Feb 73.2,Mar 80.3,Apr 55.7,May 53.0,Jun 36.4,Jul 17.5,Aug 27.5,Sep 60.9,Oct 147.7,Nov 121.0,Dec 97.9\n"
    ."London:Jan 58.0,Feb 38.9,Mar 49.9,Apr 42.2,May 67.3,Jun 52.1,Jul 59.5,Aug 77.2,Sep 55.4,Oct 62.0,Nov 69.0,Dec 52.9\n"
    ."Paris:Jan 182.3,Feb 120.6,Mar 188.1,Apr 204.9,May 323.1,Jun 350.5,Jul 336.8,Aug 192.9,Sep 66.3,Oct 63.3,Nov 83.2,Dec 154.7\n"
    ."NY:Jan 128.7,Feb 121.8,Mar 151.9,Apr 93.5,May 98.8,Jun 93.6,Jul 142.2,Aug 131.8,Sep 92.0,Oct 82.3,Nov 107.8,Dec 94.2\n"
    ."Vancouver:Jan 155.7,Feb 121.4,Mar 132.3,Apr 69.2,May 85.8,Jun 47.1,Jul 31.3,Aug 37.0,Sep 69.6,Oct 116.3,Nov 154.6,Dec 171.5\n"
    ."Sydney:Jan 123.4,Feb 111.0,Mar 151.3,Apr 129.7,May 123.0,Jun 159.2,Jul 102.8,Aug 90.3,Sep 69.3,Oct 82.6,Nov 81.4,Dec 78.2\n"
    ."Bangkok:Jan 20.6,Feb 28.2,Mar 40.7,Apr 81.8,May 189.4,Jun 151.7,Jul 198.2,Aug 197.0,Sep 319.9,Oct 230.8,Nov 57.3,Dec 9.4\n"
    ."Tokyo:Jan 59.9,Feb 81.5,Mar 106.4,Apr 139.2,May 144.0,Jun 186.0,Jul 155.6,Aug 148.5,Sep 216.4,Oct 194.1,Nov 95.6,Dec 54.4\n"
    ."Beijing:Jan 13.9,Feb 14.7,Mar 18.2,Apr 18.4,May 43.0,Jun 88.1,Jul 224.3,Aug 170.0,Sep 58.4,Oct 38.0,Nov 19.3,Dec 2.7\n"
    ."Lima:Jan 11.2,Feb 10.9,Mar 10.7,Apr 10.4,May 10.6,Jun 11.8,Jul 14.4,Aug 13.1,Sep 23.3,Oct 1.7,Nov 0.5,Dec 10.7";

<?php

function extract_town($town1, $strng1)
{
    // https://regex-generator.olafneumann.org/
    $nnn = preg_replace_callback('/[a-zA-Z]+:/', function ($matches) {
        return "  " . $matches[0];
    }, $strng1);
    $mmm = explode("  ", $nnn);
    $zzz = array_filter($mmm, function ($var) use ($town1) {
        return preg_match("/\b$town1\b/i", $var);
    });
    $sss = implode("", $zzz);
    // Replace multiple characters in one replace call:
    // https://stackoverflow.com/questions/16576983/replace-multiple-characters-in-one-replace-call
    $ggg = preg_replace('/[a-zA-Z]|:|,/', "", $sss);
    $yyy = ltrim($ggg);
    $bbb = explode(" ", $yyy);
    return $bbb;
}
function mean($town, $strng)
{
    if (preg_match("/$town/", $strng) === 0) {
        return -1;
    }
    $aaa = extract_town($town, $strng);
    // https://www.ajdesigner.com/php_code_statistics/variance_sample.php
    // calculate the mean
    $the_mean = array_sum($aaa) / count($aaa);
    return $the_mean;
}
function variance($town, $strng)
{
    if (preg_match("/$town/", $strng) === 0) {
        return -1;
    }
    $aaa = extract_town($town, $strng);
    // https://www.ajdesigner.com/php_code_statistics/variance_sample.php
    // calculate the variance
    $the_variance = 0.0;
    $the_mean = array_sum($aaa) / count($aaa);
    for ($i = 0; $i < count($aaa); $i++) {
        //sum the array
        $the_variance = $the_variance + ($aaa[$i] - $the_mean) * ($aaa[$i] - $the_mean);
    }
    $the_variance = $the_variance / (count($aaa) /*- 1.0*/);
    //return the variance
    return $the_variance;
}
include 'datafile.php';
// PHPStorm: undefined variables caused by include/require
// https://stackoverflow.com/questions/22476778/phpstorm-undefined-variables-caused-by-include-require
/**
 * @var string $data1
 * @var string $data2
 */
echo "<pre>";
  print_r(variance("London", $data1));
echo "</pre>";

preg_match(pattern, input, matches, flags, offset)

<?php

$str = "Visit W3Schools";
$pattern = "/w3schools/i";
echo preg_match($pattern, $str);

<?php

function matrix_addition($ar1, $ar2): array
{
    for ($row = 0; $row < count($ar1); $row++) {
        for ($col = 0; $col < count($ar1[0]); $col++) {
            $result[$row][$col] = ($ar1[$row][$col]) + ($ar2[$row][$col]);
        }
    }
    return $result;
}
$a = array(
    [10, 3, 5],
    [2, 4, 6],
    [2, 4, 9],
);
$b = array(
    [1, 2, 5],
    [3, 4, 3],
    [3, 4, 6],
);
echo "<pre>";
  print_r(matrix_addition($a, $b));
echo "</pre>";

<?php

function isValidCoordinates($coordinates)
{
    $mmm = explode(" ", $coordinates);
    $mmm[0] = rtrim($mmm[0], ",");
    if (
        is_numeric($mmm[0])
        && is_numeric($mmm[1])
        && ($mmm[0] >= -90 && $mmm[0] <= 90)
        && ($mmm[1] >= -180 && $mmm[1] <= 180)
        && !preg_match("/e/i", $coordinates)
    )
        return "true";
    else
        return "false";
}
//$a = "0, 1,2";
$a = "-23, 25";
echo(isValidCoordinates($a));

is_numeric(variable);

<?php

$a = 32;
echo "a is " . is_numeric($a) . "<br>";
$b = 0;
echo "b is " . is_numeric($b) . "<br>";
$c = 32.5;
echo "c is " . is_numeric($c) . "<br>";
$d = "32";
echo "d is " . is_numeric($d) . "<br>";
$e = true;
echo "e is " . is_numeric($e) . "<br>";
$f = null;
echo "f is " . is_numeric($f) . "<br>";
?>

<?php

function findIt(array $seq)
{
    $y = array_count_values($seq);
    foreach ($y as $value) {
        if ($value % 2 !== 0)
            return array_search($value, $y);
    }
}
echo "<pre>";
  print_r(findIt([20, 1, 1, 2, 2, 3, 3, 5, 5, 4, 20, 4, 5]));
echo "</pre>";

<?php

function findIt(array $seq)
{
     $nums = array_count_values($seq);
    foreach ($nums as $key => $val) {
        if ($val % 2) {
            return $key;
        }
    }
}
echo "<pre>";
  print_r(findIt([20, 1, 1, 2, 2, 3, 3, 5, 5, 4, 20, 4, 5]));
echo "</pre>";

<?php

function sortArray(array $arr)
{
    $even = $odd = array();
    // Reset keys:
    foreach ($arr as $a) {
        if ($a % 2 == 0)
            $even[] = $a;
        else
            $odd[] = $a;
    }
    sort($odd);
    $newArr = [];
    for ($i = 0; $i < count($arr); $i++) {
        if ($arr[$i] % 2 == 0) {
            $newArr[] = array_shift($even);
        } else {
            $newArr[] = array_shift($odd);
        }
    }
    return $newArr;
}
echo "<pre>";
  print_r(sortArray([5, 3, 2, 8, 1, 4]));
echo "</pre>";

array_shift(array)

<?php

$a=array("a"=>"red","b"=>"green","c"=>"blue");
echo array_shift($a);
echo "<pre>";
print_r ($a);
echo "</pre>";