evt/operators/scan.js

Type safe replacement for node's EventEmitter

"use strict";
var __read = (this && this.__read) || function (o, n) {
    var m = typeof Symbol === "function" && o[Symbol.iterator];
    if (!m) return o;
    var i = m.call(o), r, ar = [], e;
    try {
        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
    }
    catch (error) { e = { error: error }; }
    finally {
        try {
            if (r && !r.done && (m = i["return"])) m.call(i);
        }
        finally { if (e) throw e.error; }
    }
    return ar;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.scan = void 0;
var compose_1 = require("../lib/util/compose");
var scan = function (accumulator, seed) { return (0, compose_1.compose)([
    function (data, _a) {
        var _b = __read(_a, 3), acc = _b[1], index = _b[2];
        return [[data, accumulator(acc, data, index), index + 1]];
    },
    [null, seed, 0]
], function (_a) {
    var _b = __read(_a, 2), acc = _b[1];
    return [acc];
}); };
exports.scan = scan;
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