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// Copyright (c) 2020 Jozty. All rights reserved. MIT license.
import curryN from './utils/curry_n.ts';import type { PH } from './utils/types.ts';import { equals } from './equals.ts';
// @typestype IndexOf_2<T> = (list: T[]) => number;
type IndexOf_1<T> = (value: T) => number;
type IndexOf =  & (<T>(value: T) => IndexOf_2<T>)  & (<T>(value: PH, list: T[]) => IndexOf_1<T>)  & (<T>(value: T, list: T[]) => number);
function _indexOf<T>(value: T, list: T[]) {  switch (typeof value) {    case 'number': {      if (value === 0) {        // handles +0 and -0        const inf = 1 / value;        for (let i = 0; i < list.length; i++) {          const x: any = list[i];          if (x === 0 && 1 / x === inf) return i;        }        return -1;      } else if (value !== value) {        // handles NaN        for (let i = 0; i < list.length; i++) {          const x: any = list[i];          if (isNaN(x)) return i;        }        return -1;      }    }    case 'string':    case 'boolean':    case 'function':    case 'undefined':      return list.indexOf(value);
    case 'object':      if (value === null) {        return list.indexOf(value);      }  }
  let idx = -1;  list.forEach((a, i) => (idx = equals(value, a) ? i : idx));  return idx;}
/** * Returns the position of the first occurrence of `value` in `list`, or -1 * if the item is not included in the array. [`Fae.equals`](#equals) is used to * determine equality. * *      Fae.indexOf(3, [1,2,3,4]); //=> 2 *      Fae.indexOf(10, [1,2,3,4]); //=> -1 *      Fae.indexOf(0, [1, 2, 3, 0, -0, NaN]); //=> 3 *      Fae.indexOf(-0, [1, 2, 3, 0, -0, NaN]); //=> 4 *      Fae.indexOf(NaN, [1, 2, 3, 0, -0, NaN]); //=> 5 */export const indexOf: IndexOf = curryN(2, _indexOf);