pragmatic-fp-ts/lib/ascend.js

Opinionated functional programming library with easy use in mind

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ascend = void 0;
const main_1 = require("./main");
function ascend(toComparable) {
    return (a, b) => {
        const valA = (0, main_1.getValueOr)(null, a);
        const valB = (0, main_1.getValueOr)(null, b);
        const cvalA = valA && toComparable(valA);
        const cvalB = valB && toComparable(valB);
        if (cvalA === cvalB) {
            return 0;
        }
        else if ((0, main_1.isSome)(cvalA) && (0, main_1.isSome)(cvalB)) {
            return cvalA < cvalB ? 1 : -1;
        }
        else if ((0, main_1.isNil)(cvalA)) {
            return -1;
        }
        else {
            return 1;
        }
    };
}
exports.ascend = ascend;