mark-util-chunked

mark utility to splice and push into giant arrays.

Contents

• What is this?
• When should I use this?
• Install
• Use
• API
  • push<T>(list, items)
  • splice<T>(list, start, remove[, items])
• Types
• Project
  • Version
  • Contribute
  • Sponsor
• Related

What is this?

This package exposes algorithms for splicing and pushing into giant arrays.

When should I use this?

This package is useful when creating your own your own mark extensions and utilities.

Install

This package is ESM only.

In Node.js with yarn:

yarn add @flex-development/mark-util-chunked

In Deno with esm.sh:

import { push, splice } from 'https://esm.sh/@flex-development/mark-util-chunked'

In browsers with esm.sh:

<script type="module">
  import { push, splice } from 'https://esm.sh/@flex-development/mark-util-chunked'
</script>

Use

import { push, splice } from '@flex-development/mark-util-chunked'
import { ev } from '@flex-development/mark-util-symbol'
import type { Token } from '@flex-development/mark'

// ...

const token: Token = events[open][1]

// ...

next = push(next, [[ev.enter, token, context], [ev.exit, token, context]])

// ...

splice(events, open - 1, index - open + 3, next)

// ...

API

This package exports the identifiers push and splice.
There is no default export.

push<T>(list, items)

Append items to the end of list.

Items are added in batches to prevent V8 from hanging.
When list is empty, items is returned to prevent a potentially expensive operation.

Type Parameters

• T (any) — The list item type

Parameters

• list (T[]) — the list to operate on
• items (T[]) — the items to inject into list

Returns

(T[]) items when list is empty, list with appended items otherwise

splice<T>(list, start, remove[, items])

Like Array#splice, but smarter.

Remove items from list and, if necessary, insert new items in their place, returning the deleted elements.

👉 Note: Array#splice takes all items to be inserted as individual arguments which causes a stack overflow in V8 when trying to insert a large number of items (i.e. 100k).

Type Parameters

• T (any) — The list item type

Parameters

• list (T[]) — the list to operate on
• start (Numeric | number) — the index in list to remove and/or insert items at (can be negative)
• remove (Numeric | number) — the number of items to remove
• items (List<T> | null | undefined, optional) — the items to inject into list

Returns

(T[]) The list of removed items

Types

This package is fully typed with TypeScript. It exports no additional types.

Project

Version

mark-util-chunked adheres to semver.

Contribute

See CONTRIBUTING.md.

This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.

Sponsor

Small primitives power larger systems. Support long-term stability by sponsoring Flex Development.

Related

• @flex-development/mark — the specification
• @flex-development/mark-compiler — finite state machine event compiler
• @flex-development/mark-parser — finite state machine parser