Ranking methods: Difference between revisions
→JS ES6
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=={{header|JavaScript}}==
===
The task formulation doesn't seem to directly explain or determine the order of listing for players whose score is the same.
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}}==
| |||