tlojs/lib/array/linq.js

The Last One - The last npm package you'll need to install

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var EMPTY_ARRAY = 'The array is empty';
Array.prototype.select = function (callback) {
    return this.map(callback);
};
Array.prototype.min = function () {
    return Math.min.apply(Math, this);
};
Array.prototype.max = function () {
    return Math.max.apply(Math, this);
};
Array.prototype.where = function (callback) {
    return this.filter(callback);
};
Array.prototype.distinct = function () {
    return this.filter(function (value, index, self) { return self.indexOf(value) === index; });
};
Array.prototype.first = function () {
    var first = this.firstOrDefault();
    if (!first) {
        throw new Error(EMPTY_ARRAY);
    }
    return first;
};
Array.prototype.firstOrDefault = function () {
    if (this.length > 0) {
        return this[0];
    }
    return undefined;
};
Array.prototype.last = function () {
    var last = this.lastOrDefault();
    if (!last) {
        throw new Error(EMPTY_ARRAY);
    }
    return last;
};
Array.prototype.lastOrDefault = function () {
    if (this.length > 0) {
        return this[this.length - 1];
    }
    return undefined;
};