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Search data and create complex filters by compose filter functions.

License: MIT License

JavaScript 100.00%
compose cull cullender filter filter-data filter-lists filter-plugin filterable filtering filterlist filters fp functional-programming javascript search searching

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cullender's Issues

Support for TypeScript

Add type definitions or refactor using TypeScript.

type Map <T, U> = (item: T, index: number, items: ReadonlyArray<T>) => U
type Filter <T> = (item: T, index: number, items: ReadonlyArray<T>) => boolean;

const cull: <T> (items: Iterable<T>, ...λs: Array<Filter<T>>) => Array<T>;
const create: <T> (type: 'AND' | 'OR', ...λs: Array<Filter<T>>) => Filter<T>;

namespace filters {
  export const not: <T> (filter: Filter<T>) => Filter<T>;
  export const into: <T, U> (items: Array<U>, λ?: Map<T, U>) => Filter<T>;
  export const search: <T> (text: string, λ?: Map<T, (string | Array<string>)>) => Filter<T>;
  export const truthy: <T> (λ?: Map<T, boolean>) => Filter<T>;
}

export { cull, create, filters, Filter, Map };

Add CI

Add travis or another CI to show tests result and keep lib / build safe.

Add "list includes" to filters

Add a filter to check if value is present in a list.

cull([1,2,3,4,5], filters.in([1,2])) // [1, 2]
cull([1,2,3,4,5], filters.in([7,6])) // []

I thought something like function below would be awesome.

export const in = (list, λ = DEFAULT_Λ) => (...args) => {
  const result = list.includes(λ(...args))
  return result
}

Use String.normalize instead of diacritics

String.prototype.normalize combined with a character set replace do exactly what I'm looking for on diacritics module.

const normalize = (text) => text.normalize('NFKD').replace(/[\u0080-\uF8FF]/g, '')

Add not() filter

There's no way to negate filter results.

This function is useful to decorate a function negating it's results.

const not = (filter) => (...args) => !filter(...args)

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