rodaine

func handleUpload(u io.Reader) (err error) {
  // capture all bytes from upload
  b, err := ioutil.ReadAll(u)
  if err != nil {
    return
  }

  // wrap the bytes in a ReadSeeker
  r := bytes.NewReader(b)

ericelliott

ES6 Defaults / Overrides Pattern

Combine default parameters and destructuring for a compact version of the defaults / overrides pattern.

function foo ({
    bar = 'no',
    baz = 'works!'
  } = {}) {

SQiShER

docker stats $(docker inspect -f '{{.Name}}' $(docker ps -q) | cut -c 2-)

paulirish

/* bling.js */

window.$ = document.querySelectorAll.bind(document);

Node.prototype.on = window.on = function (name, fn) {
  this.addEventListener(name, fn);
}

NodeList.prototype.__proto__ = Array.prototype;

cevaris

go build -gcflags '-N'

buth

RUN \
curl -sfLO http://www.imagemagick.org/download/ImageMagick-6.9.0-4.tar.gz && \
echo 'cf51a1c6ebf627c627a8e6ac20aecce5f1425907c2cdb98c5a60f329c5c6caf2  ImageMagick-6.9.0-4.tar.gz' | sha256sum -c - && \
tar -xzf ImageMagick-6.9.0-4.tar.gz && \
cd ImageMagick-6.9.0-4 && \
./configure --prefix /usr/local && \
make install && \
cd .. && \
rm -rf  ImageMagick*

kjk

Latency numbers every programmer should know

1 typical CPU instruction ..................   1 ns
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

einthusan

#!/bin/sh

# OPTIONAL FLAGS:
#
# -geoip true 
#       this will install maxmind geoip and auto update crontab file
#
# -cloudwatch true
#       this will install aws cloud watch metrics and send them to aws dashboard
#

doug

<!-- Conditionally load WC polyfills -->
<script>
  if ('registerElement' in document
    && 'createShadowRoot' in HTMLElement.prototype
    && 'import' in document.createElement('link')
    && 'content' in document.createElement('template')) {
    // We're using a browser with native WC support!
  } else {
    document.write('<script src="/bower_components/webcomponentsjs/webcomponents.js"><\/script>');
  }

addyosmani

CSS Layout Debugger

A tweet-sized debugger for visualizing your CSS layouts. Outlines every DOM element on your page a random (valid) CSS hex color.

One-line version to paste in your DevTools

Use $$ if your browser aliases it:

~ 108 byte version