Patterns

Use built-in sort with a custom comparison function

When to useSort by frequency, multi-key sort, lexicographic with twist (largest number)

iterative

Sorting with Custom Criteria

sorting_with_custom_criteria

Sort Characters by Frequency

sort_by_frequency

Largest Number from Array

largest_number_from_array

Relative Sort Array

relative_sort_array

Built-in Sort with Custom Comparator

custom_comparator_sort

Fetch Items To Display

fetch_items_to_display

Reorder Data in Log Files | Upgrading Junction Boxes

reorder_data_in_log_files

Top N Buzzwords

top_n_buzzwords · no slots

Game Events

twitter_oa_game_events

Top K Frequently Mentioned Keywords

top_k_frequently_mentioned_keywords

INITIALIZE

optional: build frequency map / derive sort key per element

const result = [...people];

const counts = new Map();
for (const ch of s) counts.set(ch, (counts.get(ch) ?? 0) + 1);
const chars = [...counts.keys()];

const strs = nums.map(String);

const order = new Map();
for (let i = 0; i < arr2.length; i++) order.set(arr2[i], i);

// (optional) build sort key or frequency map

const sorted = [...items];

const letterLogs = []; const digitLogs = [];

—

const eventOrder = { G: 0, Y: 1, R: 2, S: 3 };
const tagged = [];
for (const e of team1Events) tagged.push({ team: team1Name, raw: e });
for (const e of team2Events) tagged.push({ team: team2Name, raw: e });

const keywordSet = new Set(keywords.map(w => w.toLowerCase()));
const counts = new Map();
for (const word of keywordSet) counts.set(word, 0);
for (const review of reviews) {
  const tokens = review.toLowerCase().split(/[^a-z]+/);
  const seen = new Set();
  for (const token of tokens) {
    if (keywordSet.has(token) && !seen.has(token)) {
      counts.set(token, counts.get(token) + 1);
      seen.add(token);
    }
  }
}
const entries = [...counts.entries()];

[COMPARATOR]

arr.sort with custom (a, b) comparator

result.sort((a, b) => {
  if (a.age !== b.age) return a.age - b.age;
  if (a.name < b.name) return -1;
  if (a.name > b.name) return 1;
  return 0;
});

chars.sort((a, b) => {
  const diff = counts.get(b) - counts.get(a);
  if (diff !== 0) return diff;
  return a.localeCompare(b);
});

strs.sort((a, b) => (b + a).localeCompare(a + b));

return [...arr1].sort((a, b) => {
  const ai = order.has(a) ? order.get(a) : arr2.length + a;
  const bi = order.has(b) ? order.get(b) : arr2.length + b;
  return ai - bi;
});

arr.sort((a, b) => { return /* negative: a first, positive: b first */; });

sorted.sort((a, b) => {
  const av = a[sortParameter]; const bv = b[sortParameter];
  let cmp = (sortParameter === 0) ? (av < bv ? -1 : av > bv ? 1 : 0) : av - bv;
  return sortOrder === 0 ? cmp : -cmp;
});

for (const log of logs) { /* partition */ }
letterLogs.sort((a, b) => {
  if (a[1] !== b[1]) return a[1] < b[1] ? -1 : 1;
  return a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0;
});

—

tagged.sort((a, b) => {
  const partsA = a.raw.split(' ');
  const partsB = b.raw.split(' ');
  const [tA1, tA2] = parseTime(partsA[1]);
  const [tB1, tB2] = parseTime(partsB[1]);
  if (tA1 !== tB1) return tA1 - tB1;
  if (tA2 !== tB2) return tA2 - tB2;
  if (eventOrder[partsA[2]] !== eventOrder[partsB[2]])
    return eventOrder[partsA[2]] - eventOrder[partsB[2]];
  if (a.team !== b.team) return a.team.localeCompare(b.team);
  return partsA[0].localeCompare(partsB[0]);
});

entries.sort((a, b) => {
  if (a[1] !== b[1]) return b[1] - a[1];
  if (a[0] < b[0]) return -1;
  if (a[0] > b[0]) return 1;
  return 0;
});

post-process

optional: derive final result from sorted order

// sorted in place — no additional transform needed

const result = chars.map((ch) => ch.repeat(counts.get(ch))).join('');

if (strs[0] === '0') return '0';

// (slice is already the sorted result)

// (optional) derive final answer from sorted array

const start = pageNumber * itemsPerPage;
return sorted.slice(start, start + itemsPerPage).map(item => item[0]);

const result = letterLogs.map(e => e[2]);
for (const log of digitLogs) result.push(log);

—

// map each tagged event to 'teamName raw-event-string'

const result = [];
for (let i = 0; i < Math.min(k, entries.length); i++) {
  result.push(entries[i][0]);
}

RETURN

return result

return result;

return result;

return strs.join('');

return sorted;

return arr;

return result;

return result;

—

return tagged.map((t) => `${t.team} ${t.raw}`);

return result;