The snippet library.
Small, practical examples. Search by task or narrow things down below.
Consume an asynchronous sequence
TypeScript: for await waits for each value of an async iterator in sequence.
TypeScript✓ Tested
Convert between integer bases
TypeScript: Supply a radix when parsing a nondecimal integer string.
TypeScript✓ Tested
Convert epoch milliseconds to whole seconds
TypeScript: JavaScript Date stores milliseconds while many APIs use Unix seconds.
TypeScript✓ Tested
Convert known numeric text to an integer
TypeScript: Convert a trusted literal to an integer before adding. Validate external input before converting it.
TypeScript✓ Tested
Copy a range without changing the source
TypeScript: Array.slice returns a shallow copy of the selected half-open range.
TypeScript✓ Tested
Copy nested structured data independently
TypeScript: structuredClone creates an independent copy of supported structured values.
TypeScript✓ Tested
Count days between UTC-midnight dates
TypeScript: A day is exactly 86400000 milliseconds for these explicitly UTC-midnight inputs.
TypeScript✓ Tested
Count the items in a collection
TypeScript: Read the collection’s length instead of hard-coding the loop limit.
TypeScript✓ Tested
Count Unicode code points in a string
TypeScript: String iteration combines surrogate pairs, unlike the UTF-16 length property.
TypeScript✓ Tested
Count words using a Map
Update a keyed counter without losing its value type.
Map✓ Tested
Create independent rows in a matrix
TypeScript: Use a mapping function to create each row instead of sharing one array with fill.
TypeScript✓ Tested
Decode a percent-encoded URL component
TypeScript: decodeURIComponent reverses percent encoding and throws for malformed sequences.
TypeScript✓ Tested