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59 lines
1.6 KiB
TypeScript
59 lines
1.6 KiB
TypeScript
import { parse } from "./parse.js";
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import { compile, generate } from "./compile.js";
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export { parse, compile, generate };
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/**
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* Parses and compiles a formula to a highly optimized function.
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* Combination of {@link parse} and {@link compile}.
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*
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* If the formula doesn't match any elements,
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* it returns [`boolbase`](https://github.com/fb55/boolbase)'s `falseFunc`.
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* Otherwise, a function accepting an _index_ is returned, which returns
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* whether or not the passed _index_ matches the formula.
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*
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* Note: The nth-rule starts counting at `1`, the returned function at `0`.
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*
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* @param formula The formula to compile.
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* @example
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* const check = nthCheck("2n+3");
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*
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* check(0); // `false`
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* check(1); // `false`
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* check(2); // `true`
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* check(3); // `false`
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* check(4); // `true`
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* check(5); // `false`
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* check(6); // `true`
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*/
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export default function nthCheck(formula: string): (index: number) => boolean;
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/**
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* Parses and compiles a formula to a generator that produces a sequence of indices.
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* Combination of {@link parse} and {@link generate}.
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*
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* @param formula The formula to compile.
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* @returns A function that produces a sequence of indices.
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* @example <caption>Always increasing</caption>
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*
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* ```js
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* const gen = nthCheck.sequence('2n+3')
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*
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* gen() // `1`
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* gen() // `3`
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* gen() // `5`
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* gen() // `8`
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* gen() // `11`
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* ```
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*
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* @example <caption>With end value</caption>
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*
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* ```js
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*
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* const gen = nthCheck.sequence('-2n+5');
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*
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* gen() // 0
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* gen() // 2
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* gen() // 4
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* gen() // null
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* ```
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*/
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export declare function sequence(formula: string): () => number | null;
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//# sourceMappingURL=index.d.ts.map
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