timfee

type TimeZoneInfo = {
  friendlyName: string
  offsetString: string
  offsetNumeric: number
  longTimezones: string[]
}

function offsetStringToNumeric(offsetString: string): number {
  const sign = offsetString.startsWith("GMT-") ? -1 : 1
  const [hours, minutes] = offsetString.slice(4).split(":").map(Number)

awaismirza

OpenSsl Cheat Sheet

Generate Key

We can use openssl Command-line utility to generate private key which will be used for generating certificate Signing Request and Certificate.

openssl genpkey -out server.key -algorithm RSA -pkeyopt rsa_keygen_bits:2048 -aes-128-cbc

You can name your key whatever you like for example key.pem | key.key | sample.hello doesn’t matter what you name the key but the general convention is to use .pem extension.

Generate Certificate Signing Request

OliverJAsh

Flexbox gutters

Problem

• We use flexbox for our layout.
• We want to add horizontal and vertical gutters inbetween these items.
• Items wrap according to contents (flex-wrap: wrap), therefore we can't decide when/where to apply gutters using breakpoints.

Solution

rauschma

Quick reference: Math

Data properties

• Math.E: number ^ES1

  Euler’s number, base of the natural logarithms, approximately 2.7182818284590452354.

• Math.LN10: number ^ES1

vcarl

I bundled these up into groups and wrote some thoughts about why I ask them!

If these helped you, I'd love to hear about it!! I'm on twitter @vcarl_ or send me an email carl.vitullo@gmail.com

Onboarding and the workplace

https://blog.vcarl.com/interview-questions-onboarding-workplace/

• How long will it take to deploy my first change? To become productive? To understand the codebase?
• What kind of equipment will I be provided? Will the company pay/reimburse me if I want something specific?

rauschma

Strings

String.prototype.*

None of the string methods modify this – they always return fresh strings.

• charAt(pos: number): string ^ES1

  Returns the character at index pos, as a string (JavaScript does not have a datatype for characters). str[i] is equivalent to str.charAt(i) and more concise (caveat: may not work on old engines).

rauschma

This content moved here: https://exploringjs.com/impatient-js/ch_arrays.html#quickref-arrays

nodkz

/* @flow */
/* eslint-disable */

import mongoose from 'mongoose';

export type MongoId = typeof mongoose.Types.ObjectId | {
  toString(): string,
};
export type MongoOrScalarId = MongoId | string | number;

DmitrySoshnikov

Rust notes: dynamic and global static objects

Level: novices, n00bs

Rust is a statically typed language, which helps preventing runtime bugs, and ensures memory safety at compile time, that is with no runtime costs. However, sometimes one may need using dynamic values. Also, Rust doesn't support "out of the box" complex static structures, which still can be solved with some lazy initialization tricks.

Below are some notes on dynamic data types, and global static objects in Rust programming language.

Dynamic objects

jFransham

Achieving warp speed with Rust

Contents:

• Number one optimization tip: don't
• Never optimize blindly
• Don't bother optimizing one-time costs
• Improve your algorithms
• CPU architecture primer
• Keep as much as possible in cache
• Keep as much as possible in registers