Answer1215

摘要： In Go, function can return multi value: func addAndSubstract(a int, b int) (int, int) { return a+b, a-b } It is also possible to define named return v 阅读全文

摘要： What is holey array: an array with hole(s) const array = [1,2, ,3] Why this is a problem? Should array[2] to be undefined? Yes and no.. normally it is 阅读全文

摘要： import { createBenchmark } from "./benchmark"; class MyArray extends Array {} const SIZE = 100; const obj: Record<string, number> = {}; /** * { * _0: 阅读全文

摘要： double equals is 15 times slower than triple equals. Underhood double equals need to call valueOf()function to convert the value. ({valueOf: () => 3}) 阅读全文

摘要： Benchmark: 查看代码 import {createBenchmark} from './benchmark'; const ARRAY_SIZE = 10000; const array1 = []; // {value,prop_0}, {value,prop_0}, {value,pr 阅读全文

摘要： https://www.npmjs.com/package/ses Lockdown The lockdown() function also tames some objects including regular expressions, locale methods, and errors. 阅读全文

摘要： When you create a object, in V8, it creates a hidden class to repesent the object shape. Two different objects with same object shape might share the 阅读全文

摘要： const COUNT = Number.parseInt(process.argv[2] || "10"); console.log(`Running ${COUNT} iterations.`); let value = 0; export function benchA() { value = 阅读全文

摘要： Concurrency + Channel (CSP): Concurrency is a way to run operation in isolated thread, a way to better utilize the CPU resources and handle multi simu 阅读全文

摘要： function getData(d) { setTimeout(() => { if (typeof d "number") { run.next(d/2) } else { run.next(d) } }, 500) } function* gen() { var x = 1 + (yield 阅读全文