monocle-ts-esm/lib/Index/Array.js

A porting of scala monocle library to TypeScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.indexArray = void 0;
/**
 * @since 1.2.0
 */
const __1 = require("..");
const Array_1 = require("fp-ts-esm/Array");
const Option_1 = require("fp-ts-esm/Option");
/**
 * @category constructor
 * @since 1.2.0
 */
function indexArray() {
    return new __1.Index((i) => new __1.Optional((as) => (0, Array_1.lookup)(i, as), (a) => (as) => {
        const oas = (0, Array_1.updateAt)(i, a)(as);
        if ((0, Option_1.isNone)(oas)) {
            return as;
        }
        else {
            return oas.value;
        }
    }));
}
exports.indexArray = indexArray;