delijati

import sys
import copy
import time
import math
import heapq
import argparse

FINFINITY = 5000
USAGE = "python puzzle8.py [bfs|idfs|astar|idastar]"

seboudry

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns                     on recent CPU
L2 cache reference ........................... 7 ns                     14x L1 cache
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns                     20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs 4X memory

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

ericlippert

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;

// An immutable stack
//
// Note that the class is abstract with a private 
// constructor; this ensures that only nested classes
// may be derived classes.

chantastic

Hi Nicholas,

I saw you tweet about JSX yesterday. It seemed like the discussion devolved pretty quickly but I wanted to share our experience over the last year. I understand your concerns. I've made similar remarks about JSX. When we started using it Planning Center, I led the charge to write React without it. I don't imagine I'd have much to say that you haven't considered but, if it's helpful, here's a pattern that changed my opinion:

The idea that "React is the V in MVC" is disingenuous. It's a good pitch but, for many of us, it feels like in invitation to repeat our history of coupled views. In practice, React is the V and the C. Dan Abramov describes the division as Smart and Dumb Components. At our office, we call them stateless and container components (view-controllers if we're Flux). The idea is pretty simple: components can't

jfairbank

function *fibonacci(n) {
  const infinite = !n && n !== 0;
  let current = 0;
  let next = 1;
  
  while (infinite || n--) {
    yield current;
    [current, next] = [next, current + next];
  }
}

protron

[alias]
	aliases = config --global --get-regexp 'alias.*'
	st = status
	co = checkout
	ci = commit
	skip = update-index --skip-worktree
	unskip = update-index --no-skip-worktree
	skipped = !git ls-files -v . | grep ^S
	hide = update-index --assume-unchanged
	unhide = update-index --no-assume-unchanged

acr13

import { call, put, select } from 'redux-saga/effects';

import { API_BUTTON_CLICK_SUCCESS, API_BUTTON_CLICK_ERROR, } from './actions/consts';
import { getUserAccessToken } from './selectors';
import { getDataFromAPI } from './api';
import { apiSideEffect } from './sagas';

it('apiSideEffect - dispatches API_BUTTON_CLICK_ERROR if we aren\'t authenticated', () => {
  const generator = apiSideEffect();
  const fakeAccessToken = ''; // or false, null, etc