Ranking methods: Difference between revisions

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 =={{header|JavaScript}}==
-===Functional ES5===
+===ES5===
 The task formulation doesn't seem to directly explain or determine the order of listing for players whose score is the same.
@@ Line 946: / Line 946: @@
 | Stephen || 39 || 7 || 7 || 4 || 7 || 7
 |}
+===ES6===
+<lang JavaScript>((() => {
+    const xs = 'Solomon Jason Errol Garry Bernard Barry Stephen'.split(' '),
+        ns = [44, 42, 42, 41, 41, 41, 39];
+    const sorted = xs.map((x, i) => ({
+            name: x,
+            score: ns[i]
+        }))
+        .sort((a, b) => {
+            const c = b.score - a.score;
+            return c ? c : a.name < b.name ? -1 : a.name > b.name ? 1 : 0;
+        });
+    const names = sorted.map(x => x.name),
+        scores = sorted.map(x => x.score),
+        reversed = scores.slice(0)
+        .reverse(),
+        unique = scores.filter((x, i) => scores.indexOf(x) === i);
+    // RANKINGS AS FUNCTIONS OF SCORES: SORTED, REVERSED AND UNIQUE
+    // rankings :: Int -> Int -> Dictonary
+    const rankings = (score, index) => ({
+        name: names[index],
+        score,
+        Ordinal: index + 1,
+        Standard: scores.indexOf(score) + 1,
+        Modified: reversed.length - reversed.indexOf(score),
+        Dense: unique.indexOf(score) + 1,
+        Fractional: (n => (
+            (scores.indexOf(n) + 1) +
+            (reversed.length - reversed.indexOf(n))
+        ) / 2)(score)
+    });
+    // tbl :: [[[a]]]
+    const tbl = [
+            'Name Score Standard Modified Dense Ordinal Fractional'.split(' ')
+        ].concat(scores.map(rankings)
+        .reduce((a, x) => a.concat([
+            [x.name, x.score,
+                x.Standard, x.Modified, x.Dense, x.Ordinal, x.Fractional
+            ]
+        ]), []));
+    // wikiTable :: [[[a]]] -> Bool -> String -> String
+    const wikiTable = (lstRows, blnHeaderRow, strStyle) =>
+        `{| class="wikitable" ${strStyle ? 'style="' + strStyle + '"' : ''}
+        ${lstRows.map((lstRow, iRow) => {
+            const strDelim = ((blnHeaderRow && !iRow) ? '!' : '|');
+            return '\n|-\n' + strDelim + ' ' + lstRow
+            .map(v => typeof v === 'undefined' ? ' ' : v)
+            .join(' ' + strDelim + strDelim + ' ');
+        }).join('')}\n|}`;
+    return wikiTable(tbl, true, 'text-align:center');
+}))();</lang>
+{| class="wikitable" style="text-align:center"
+|-
+! Name !! Score !! Standard !! Modified !! Dense !! Ordinal !! Fractional
+|-
+| Solomon || 44 || 1 || 1 || 1 || 1 || 1
+|-
+| Errol || 42 || 2 || 3 || 2 || 2 || 2.5
+|-
+| Jason || 42 || 2 || 3 || 2 || 3 || 2.5
+|-
+| Barry || 41 || 4 || 6 || 3 || 4 || 5
+|-
+| Bernard || 41 || 4 || 6 || 3 || 5 || 5
+|-
+| Garry || 41 || 4 || 6 || 3 || 6 || 5
+|-
+| Stephen || 39 || 7 || 7 || 4 || 7 || 7
+|}
+{{Out}}
 =={{header|jq}}==