This project is part of the @thi.ng/umbrella monorepo.

• About
  • Status
• Installation
• Dependencies
• API
  • Binary search result predicates
• Authors
• License

Array / Arraylike utilities.

STABLE - used in production

Search or submit any issues for this package

yarn add @thi.ng/arrays

ES module import:

<script type="module" src="https://cdn.skypack.dev/@thi.ng/arrays"></script>

Skypack documentation

For Node.js REPL:

# with flag only for < v16
node --experimental-repl-await

> const arrays = await import("@thi.ng/arrays");

Package sizes (gzipped, pre-treeshake): ESM: 2.51 KB

• @thi.ng/api
• @thi.ng/checks
• @thi.ng/compare
• @thi.ng/equiv
• @thi.ng/errors
• @thi.ng/random

Generated API docs

• arrayIterator()
• argSort()
• binarySearch()
• bisect()
• blit1d() / blit2d()
• endsWith()
• ensureArray()
• ensureIterable()
• fillRange()
• find()
• fuzzyMatch()
• insert()
• into()
• isSorted()
• levenshtein()
• multiSwap()
• peek()
• quickSort()
• shuffle() (w/ custom PRNG support)
• shuffleRange() (w/ custom PRNG support)
• sortByCachedKey()
• startsWith()
• swap()
• swizzle()

The following predicates can be used to perform predecessor / successor queries using binarySearch().

• bsLT() - Returns index of last item less than search value or -1 if no such values exist
• bsLE() - Similar to bsLT(), but for less-than-equals queries
• bsGT() - Returns index of first item greater than search value or -1 if no such values exist
• bsGE() - Similar to bsGT(), but for less-than-equals queries
• bsEQ() - Merely syntax sugar, casting any non-found result indices to -1

const src = [10, 20, 30, 40];

bsLT(binarySearch(src, 25))
// 1

// greater-than queries also require the array length

bsGT(binarySearch(src, 25), src.length)
// 2

bsGT(binarySearch(src, 40), src.length)
// -1

Karsten Schmidt

If this project contributes to an academic publication, please cite it as:

@misc{thing-arrays,
  title = "@thi.ng/arrays",
  author = "Karsten Schmidt",
  note = "https://thi.ng/arrays",
  year = 2018
}

© 2018 - 2022 Karsten Schmidt // Apache Software License 2.0