Merge pull request Al2Klimov#16 from Al2Klimov/feature/sort-#4

Allow to sort with the --numeric-sort param

Author: Al2Klimov

sort.php

@@ -13,14 +13,24 @@ function checkForNextLine($arr)
     return $arr;
 }
 
-function bubbleSort($sort_array)
+function castToInt($firstNum, $secondNum)
+{
+    return (int)$firstNum < (int)$secondNum;
+}
+
+function checkForEquality($firstNum, $secondNum)
+{
+    return $firstNum < $secondNum;
+}
+
+function bubbleSort($sort_array, $checkEquality)
 {
     $array_indexes = count($sort_array);
     $sorted = false;
 
     for ($i = 0; $i < $array_indexes; $i++) {
         for ($j = 0; $j < $array_indexes - $i - 1; $j++) {
-            if ($sort_array[$j + 1] < $sort_array[$j]) {
+            if ($checkEquality($sort_array[$j + 1], $sort_array[$j])) {
                 $tmp = $sort_array[$j + 1];
                 $sort_array[$j + 1] = $sort_array[$j];
                 $sort_array[$j] = $tmp;
@@ -37,10 +47,18 @@ function bubbleSort($sort_array)
     return $sort_array;
 }
 
-if($argc > 1 && substr($argv[1], 0, 1) !== '-') {
-    $fileName = $argv[1];
+$optind = null;
+$options = getopt("n", [], $optind);
+if (key_exists("n", $options)) {
+    $funcCallback = 'castToInt';
+} else {
+    $funcCallback = 'checkForEquality';
+}
+
+if(isset($argv[$optind])) {
+    $fileName = $argv[$optind];
 } else {
     $fileName = 'php://stdin';
 }
 
-echo implode("", bubbleSort(checkForNextLine(file($fileName))));
+echo implode("", bubbleSort(checkForNextLine(file($fileName)), $funcCallback));