'use strict';

const benchmark = require('./2-benchmark.js');

const cities = new Map();

cities.set('Athens', { name: 'Афины', population: 664046 });

cities.set('Rome', { name: 'Рим', population: 2627000 });

cities.set('London', { name: 'Лондон', population: 8674000 });

cities.set('Beijing', { name: 'Пекин', population: 11510000 });

cities.set('Kiev', { name: 'Киев', population: 2804000 });

cities.set('Riga', { name: 'Рига', population: 643615 });

const citiesOld = {

Athens: { name: 'Афины', population: 664046 },

Rome: { name: 'Рим', population: 2627000 },

London: { name: 'Лондон', population: 8674000 },

Beijing: { name: 'Пекин', population: 11510000 },

Kiev: { name: 'Киев', population: 2804000 },

Riga: { name: 'Рига', population: 643615 }

};

const testForInHash = () => {

const arr = [];

for (const key in citiesOld) {

arr.push([ citiesOld[key], key ]);

}

};

const testForEach = () => {

const arr = [];

cities.forEach((value, key) => {

arr.push([ value, key ]);

});

};

const testForOf = () => {

const arr = [];

for (const [key, value] of cities) {

arr.push([ value, key ]);

}

};

const testForOfKeys = () => {

const arr = [];

for (const key of cities.keys()) {

arr.push(key);

}

};

const testForOfValues = () => {

const arr = [];

for (const value of cities.values()) {

arr.push(value);

}

};

const testForOfEntries = () => {

const arr = [];

for (const [key, value] of cities.entries()) {

arr.push([ key, value ]);

}

};

benchmark.do(1000000, [

testForInHash,

testForEach,

testForOf,

testForOfKeys,

testForOfValues,

testForOfEntries,

]);