fp-ts/es6/Apply.js

Functional programming in TypeScript

import { tuple } from './function';
function curried(f, n, acc) {
    return function (x) {
        var combined = Array(acc.length + 1);
        for (var i = 0; i < acc.length; i++) {
            combined[i] = acc[i];
        }
        combined[acc.length] = x;
        return n === 0 ? f.apply(null, combined) : curried(f, n - 1, combined);
    };
}
var tupleConstructors = {
    1: function (a) { return [a]; },
    2: function (a) { return function (b) { return [a, b]; }; },
    3: function (a) { return function (b) { return function (c) { return [a, b, c]; }; }; },
    4: function (a) { return function (b) { return function (c) { return function (d) { return [a, b, c, d]; }; }; }; },
    5: function (a) { return function (b) { return function (c) { return function (d) { return function (e) { return [a, b, c, d, e]; }; }; }; }; }
};
function getTupleConstructor(len) {
    if (!tupleConstructors.hasOwnProperty(len)) {
        tupleConstructors[len] = curried(tuple, len - 1, []);
    }
    return tupleConstructors[len];
}
export function sequenceT(F) {
    return function () {
        var args = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            args[_i] = arguments[_i];
        }
        var len = args.length;
        var f = getTupleConstructor(len);
        var fas = F.map(args[0], f);
        for (var i = 1; i < len; i++) {
            fas = F.ap(fas, args[i]);
        }
        return fas;
    };
}
function getRecordConstructor(keys) {
    var len = keys.length;
    switch (len) {
        case 1:
            return function (a) {
                var _a;
                return (_a = {}, _a[keys[0]] = a, _a);
            };
        case 2:
            return function (a) { return function (b) {
                var _a;
                return (_a = {}, _a[keys[0]] = a, _a[keys[1]] = b, _a);
            }; };
        case 3:
            return function (a) { return function (b) { return function (c) {
                var _a;
                return (_a = {}, _a[keys[0]] = a, _a[keys[1]] = b, _a[keys[2]] = c, _a);
            }; }; };
        case 4:
            return function (a) { return function (b) { return function (c) { return function (d) {
                var _a;
                return (_a = {},
                    _a[keys[0]] = a,
                    _a[keys[1]] = b,
                    _a[keys[2]] = c,
                    _a[keys[3]] = d,
                    _a);
            }; }; }; };
        case 5:
            return function (a) { return function (b) { return function (c) { return function (d) { return function (e) {
                var _a;
                return (_a = {},
                    _a[keys[0]] = a,
                    _a[keys[1]] = b,
                    _a[keys[2]] = c,
                    _a[keys[3]] = d,
                    _a[keys[4]] = e,
                    _a);
            }; }; }; }; };
        default:
            return curried(function () {
                var args = [];
                for (var _i = 0; _i < arguments.length; _i++) {
                    args[_i] = arguments[_i];
                }
                var r = {};
                for (var i = 0; i < len; i++) {
                    r[keys[i]] = args[i];
                }
                return r;
            }, len - 1, []);
    }
}
export function sequenceS(F) {
    return function (r) {
        var keys = Object.keys(r);
        var len = keys.length;
        var f = getRecordConstructor(keys);
        var fr = F.map(r[keys[0]], f);
        for (var i = 1; i < len; i++) {
            fr = F.ap(fr, r[keys[i]]);
        }
        return fr;
    };
}
/* tslint:enable:readonly-array */