public_library_map/node_modules/nth-check/lib/index.d.ts
2021-11-24 08:46:47 +00:00

28 lines
920 B
TypeScript

import { parse } from "./parse";
import { compile } from "./compile";
export { parse, compile };
/**
* Parses and compiles a formula to a highly optimized function.
* Combination of `parse` and `compile`.
*
* If the formula doesn't match any elements,
* it returns [`boolbase`](https://github.com/fb55/boolbase)'s `falseFunc`.
* Otherwise, a function accepting an _index_ is returned, which returns
* whether or not the passed _index_ matches the formula.
*
* Note: The nth-rule starts counting at `1`, the returned function at `0`.
*
* @param formula The formula to compile.
* @example
* const check = nthCheck("2n+3");
*
* check(0); // `false`
* check(1); // `false`
* check(2); // `true`
* check(3); // `false`
* check(4); // `true`
* check(5); // `false`
* check(6); // `true`
*/
export default function nthCheck(formula: string): (index: number) => boolean;
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