Brian Racer anveo

Falsehoods programmers believe about time

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

Falsehoods

There are always 24 hours in a day.
February is always 28 days long.
Any 24-hour period will always begin and end in the same day (or week, or month).

High-Performance Matrix Multiplication

This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).

Intro

Matrix multiplication is a mathematical operation that defines the product of

Resources:

https://github.com/ankane/searchkick

Indexing

By default, simply adding the call 'searchkick' to a model will do an unclever indexing of all fields (but not has_many or belongs_to attributes).

In practice, you'll need to customize what gets indexed. This is done by defining a method on your model called search_data

def search_data

	require 'sidekiq/api'

	# 1. Clear retry set

	Sidekiq::RetrySet.new.clear

	# 2. Clear scheduled jobs

	Sidekiq::ScheduledSet.new.clear

	DROP TABLE if exists d_date;

	CREATE TABLE d_date
	(
	date_dim_id INT NOT NULL,
	date_actual DATE NOT NULL,
	epoch BIGINT NOT NULL,
	day_suffix VARCHAR(4) NOT NULL,
	day_name VARCHAR(9) NOT NULL,
	day_of_week INT NOT NULL,

	#!/usr/bin/env bash

	# starts (or restarts) a 1password cli session, sets 30 minute countdown variable

	# use: OP_CLOUD_ACCOUNT="[your-account-name]" source /path/to/op_session.sh command
	# e.g.: OP_CLOUD_ACCOUNT="familyname" source ~/op_session.sh get account


	check_session(){
	# attempt sign in if session is not active

	#!/bin/bash

	# Get directory of script
	DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

	if [[ $# -ne 1 ]]
	then
	echo "ERROR: This script expects the namespace name to be given as an argument"
	echo "e.g. ./ecr-cred-updater.sh my-namespace"
	exit 1

	addEventListener('fetch', event => {
	event.respondWith(handleRequest(event))
	})

	/**
	* Entry point of the worker
	*/
	async function handleRequest(event) {
	try {
	// Get the JWT

	Mute these words in your settings here: https://twitter.com/settings/muted_keywords

	ActivityTweet
	generic_activity_highlights
	generic_activity_momentsbreaking
	RankedOrganicTweet
	suggest_activity
	suggest_activity_feed
	suggest_activity_highlights
	suggest_activity_tweet

	const puppeteer = require("puppeteer");
	const opn = require("opn");
	const nodemailer = require("nodemailer");

	const timeout = 5000;
	const waitForTimeout = 1000;

	const cartLink =
	"https://store.nvidia.com/store/nvidia/en_US/buy/productID.5438481700/clearCart.yes/nextPage.QuickBuyCartPage";