Code Explainers
Code explainers tagged #sorting
java
public List<int[]> merge(int[][] intervals) { if (intervals.length == 0) { return new ArrayList<>(); }
Merging overlapping intervals in Java
intervals
sorting
greedy
Intermediate
7 steps
python
from typing import List, Tuple def merge_intervals(intervals: List[Tuple[int, int]]) -> List[Tuple[int, int]]:
How interval merging works
sorting
greedy
intervals
Intermediate
6 steps
ruby
class DateRangeMerger def initialize(ranges) @ranges = ranges end
Merging overlapping date ranges in Ruby
sorting
interval-merging
enumerable
Intermediate
5 steps
php
function fuzzySearch(string $query, array $items, int $limit = 10): array { $query = mb_strtolower(trim($query));
Building a ranked fuzzy search in PHP
fuzzy-search
string-matching
ranking
Intermediate
7 steps
java
import java.util.Comparator; import java.util.LinkedHashMap; import java.util.Map; import java.util.regex.Pattern;
Ranking the most frequent words in Java
streams
regex
grouping
Intermediate
7 steps
rust
use std::cmp::Ordering; pub struct PrefixIndex { entries: Vec<String>,
Prefix search with binary partitioning in Rust
binary-search
sorting
case-insensitive
Intermediate
7 steps
typescript
type SortDirection = "asc" | "desc"; interface SortKey<T> { selector: (row: T) => string | number | Date | null | undefined;
Multi-column sorting in TypeScript
generics
comparators
sorting
Intermediate
6 steps
go
type Employee struct { Department string LastName string FirstName string
Multi-key sorting in Go
sorting
comparators
tie-breaking
Intermediate
6 steps
rust
pub fn merge_intervals(mut intervals: Vec<(i64, i64)>) -> Vec<(i64, i64)> { if intervals.is_empty() { return Vec::new(); }
Merging overlapping intervals in Rust
intervals
sorting
greedy
Intermediate
7 steps
python
from operator import itemgetter def sort_employees(employees):
Multi-key sorting patterns in Python
sorting
tuple-keys
itemgetter
Intermediate
5 steps
python
from pathlib import Path def print_tree(root, prefix="", show_hidden=False):
Printing a directory tree with recursion
recursion
filesystem
sorting
Intermediate
6 steps
rust
use std::collections::HashMap; pub fn word_frequencies(text: &str) -> HashMap<String, usize> { let mut counts: HashMap<String, usize> = HashMap::new();
Counting and ranking words in Rust
hashmap
iterators
sorting
Intermediate
7 steps
javascript
import { useMemo, useState } from 'react'; function ProductList({ products }) { const [query, setQuery] = useState('');
Memoizing a filtered list in React
memoization
derived-state
filtering
Intermediate
8 steps
python
def two_sum_sorted(numbers, target): """Find indices of two values that sum to target in a sorted array.""" left, right = 0, len(numbers) - 1 while left < right:
Two-pointer search on sorted arrays
two-pointers
arrays
sorting
Intermediate
9 steps
java
public final class Quicksort { private Quicksort() { }
Quicksort with Lomuto partitioning in Java
recursion
divide-and-conquer
in-place
Intermediate
7 steps