Ready to run

Code snippets

Small, working examples you can read, understand, and open in the ShareCode editor to run or adapt. No setup, no sign-up — just code.

JavaJavaScriptPythonTypeScript

TypeScript

A typed Result type in TypeScript

Return errors as values the compiler forces you to handle, instead of throwing exceptions that callers can silently forget.

View snippet Python

Binary search in Python

Find an item in a sorted list in O(log n) time, with the iterative version, a recursive one, and Python's built-in bisect.

View snippet JavaScript

Debounce a function in JavaScript

Delay running a function until the calls stop coming in — the standard fix for resize, scroll, and search-as-you-type handlers that fire far too often.

View snippet JavaScript

Deep clone an object in JavaScript

Make a fully independent copy of a nested object so mutating the copy never touches the original.

View snippet Python

Group a list of dictionaries by key in Python

Turn a flat list of records into buckets keyed by one of their fields, using only the standard library.

View snippet Java

Read a file line by line in Java

Load a text file's lines without the old BufferedReader boilerplate — and stream them when the file is large.

View snippet

Every snippet opens in a live editor

Hit “Open in ShareCode” on any snippet to drop it into a collaborative code space — then share the link to edit it together.

Two browser windows open on the same ShareCode session, editing the same file in real time, with the JavaScript console showing the code's output below. — Two people on the same code space, live — and JavaScript runs right in the browser, with output in the console.