lazzy.ts/consumers/sum.js

Fast and lightweight library for lazy operations with iterable objects.

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.sumAsync = exports.sum = void 0;
const helpers_1 = require("../common/helpers");
function sum(iterator, ...select) {
    let x = iterator.next();
    if (x.done === true) {
        return 0;
    }
    const selector = helpers_1.getNumericSelector(x.value, ...select);
    let totalSum = 0;
    while (x.done !== true) {
        totalSum += selector(x.value);
        x = iterator.next();
    }
    return totalSum;
}
exports.sum = sum;
function sumAsync(iterator, ...select) {
    return __awaiter(this, void 0, void 0, function* () {
        let x = yield iterator.next();
        if (x.done === true) {
            return 0;
        }
        const selector = helpers_1.getNumericSelector(x.value, ...select);
        let totalSum = 0;
        while (x.done !== true) {
            totalSum += selector(x.value);
            x = yield iterator.next();
        }
        return totalSum;
    });
}
exports.sumAsync = sumAsync;
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