回答編集履歴
2
関数を改良
test
CHANGED
@@ -70,9 +70,9 @@
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「追記」
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-
ユーザー的な情報を用いて出力できるよう修正して
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ユーザー的な情報を用いて出力できるよう修正してたよ。
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う
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この手法を使えば小数点等でも対応出来ると思うよ。
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@@ -80,13 +80,13 @@
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<?php
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-
function array_count_by ($
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function array_count_by_kokugo ($arr) {
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$results = [];
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foreach ($arr as $it) {
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$key =
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$key = (string)$it['kokugo'];
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if (!isset($results[$key])) $results[$key] = [];
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@@ -95,24 +95,6 @@
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}
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return $results;
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}
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function get_kokugo ($it) {
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return (string)$it['kokugo'];
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}
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function cmp ($a, $b) {
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$a2 = (float)get_kokugo($a);
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$b2 = (float)get_kokugo($b);
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if ($a2 == $b2) return 0;
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return ($a2 < $b2) ? 1 : -1;
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}
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@@ -140,13 +122,23 @@
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];
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usort($a, function ($a, $b) {
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-
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$a2 = $a['kokugo'];
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$b2 = $b['kokugo'];
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if ($a2 == $b2) return 0;
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return ($a2 < $b2) ? 1 : -1;
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});
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$rank = 1;
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foreach (array_count_by
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foreach (array_count_by_kokugo($a) as $point => $users) {
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foreach ($users as $user) {
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@@ -157,6 +149,8 @@
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$rank += count($users);
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}
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?>
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1
追記、様々なケースに耐えられるよう改造
test
CHANGED
@@ -61,3 +61,123 @@
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9位: 85
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```
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---
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「追記」
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+
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+
ユーザー的な情報を用いて出力できるよう修正してみた。
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うーん、あんまり美しくないかも?
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```PHP
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<?php
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function array_count_by ($fn, $arr) {
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$results = [];
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foreach ($arr as $it) {
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$key = $fn($it);
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if (!isset($results[$key])) $results[$key] = [];
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$results[$key][] = $it;
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}
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return $results;
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}
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function get_kokugo ($it) {
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return (string)$it['kokugo'];
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}
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function cmp ($a, $b) {
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$a2 = (float)get_kokugo($a);
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$b2 = (float)get_kokugo($b);
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if ($a2 == $b2) return 0;
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return ($a2 < $b2) ? 1 : -1;
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}
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$a = [
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["name" => "a", "kokugo" => 80.5],
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["name" => "b", "kokugo" => 100],
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["name" => "c", "kokugo" => 81],
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["name" => "d", "kokugo" => 100],
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["name" => "e", "kokugo" => 90.5],
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["name" => "f", "kokugo" => 90.5],
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["name" => "g", "kokugo" => 90.5],
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["name" => "h", "kokugo" => 87.5],
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["name" => "g", "kokugo" => 80],
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];
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usort($a, 'cmp');
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$rank = 1;
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foreach (array_count_by('get_kokugo', $a) as $point => $users) {
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foreach ($users as $user) {
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echo "{$rank}位: {$user['name']} ({$point})\n";
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}
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$rank += count($users);
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}
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?>
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1位: d (100)
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1位: b (100)
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3位: f (90.5)
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3位: g (90.5)
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3位: e (90.5)
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6位: h (87.5)
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7位: c (81)
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8位: a (80.5)
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9位: g (80)
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```
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