@walts81/linq-ts/lib/sum.js

Typescript/Javascript LINQ implementation library

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.sum = void 0;
Array.prototype.sum = sum;
const getSafeNumber = (val) => {
    if (!val)
        return 0;
    const numVal = Number(val);
    return isNaN(numVal) ? 0 : numVal;
};
function sum(expression = x => x) {
    let amount = 0;
    const length = this.length;
    for (let i = 0; i < length; i++) {
        amount += getSafeNumber(expression(this[i], i));
    }
    return amount;
}
exports.sum = sum;