jamiew

parse_git_branch() {
  ref=$(git symbolic-ref -q HEAD 2> /dev/null) || return
  printf "${1:-(%s)}" "${ref#refs/heads/}"
}

parse_svn_revision() {
  local DIRTY REV=$(svn info 2>/dev/null | grep Revision | sed -e 's/Revision: //')
  [ "$REV" ] || return
  [ "$(svn st)" ] && DIRTY=' *'
  echo "(r$REV$DIRTY)"

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
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

rab

# -*- Conf -*-
[color]
	branch = auto
	diff = auto
	status = auto
        showbranch = auto
	ui = true

# color.branch
#     A boolean to enable/disable color in the output of git-branch(1). May be set to always, false (or

mathiasbynens

// Here’s a 100% deterministic alternative to `Math.random`. Google’s V8 and
// Octane benchmark suites use this to ensure predictable results.

Math.random = (function() {
	var seed = 0x2F6E2B1;
	return function() {
		// Robert Jenkins’ 32 bit integer hash function
		seed = ((seed + 0x7ED55D16) + (seed << 12))  & 0xFFFFFFFF;
		seed = ((seed ^ 0xC761C23C) ^ (seed >>> 19)) & 0xFFFFFFFF;
		seed = ((seed + 0x165667B1) + (seed << 5))   & 0xFFFFFFFF;

branneman

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

Possible solutions

lucasdavila

# see the current limits
$ sysctl -a | grep maxproc

# increase it
$ sudo sysctl -w kern.maxproc=xxxx
$ sudo sysctl -w kern.maxprocperuid=xxx

# run at startup
$ sudo vim /etc/sysctl.conf

naesheim

##################
### config.yml ###
##################

version: 2
jobs:
    build:
        docker:
            - image: circleci/python:3.6
        steps:

ebidel

<!-- 
Complete feature detection for ES modules. Covers:

1. Static import: import * from './foo.js';
2. Dynamic import(): import('./foo.js').then(module => {...});

Demo: http://jsbin.com/tilisaledu/1/edit?html,output

Thanks to @_gsathya, @kevincennis, @rauschma, @malyw for the help.
-->

Sawtaytoes

const { BehaviorSubject, Subject } = require('rxjs')
const { map, tap, withLatestFrom } = require('rxjs/operators')

const createIteratorSubject = (
  iterator,
) => {
  const iterator$ = (
    new BehaviorSubject()
  )

Sawtaytoes

const { fromEvent, Subject } = require('rxjs')
const { take } = require('rxjs/operators')
const { Transform } = require('stream')

const createTransformStreamSubject = (
  nodeJsStream,
) => {
  const chunk$ = new Subject()
  const push$ = new Subject()
  const transformStream$ = new Subject()