ankane

require "onnxruntime"
require "mini_magick"
require "numo/narray"

img = MiniMagick::Image.open("images/32576677167_a066c5a7aa_z.jpg")
img.resize "448x448^", "-gravity", "center", "-extent", "448x448"

pixels = Numo::NArray[*img.get_pixels]
pixels = pixels.transpose(2, 0, 1)
pixels = pixels.expand_dims(0)

ankane

require "onnxruntime"
require "mini_magick"

img = MiniMagick::Image.open("bears.jpg")
pixels = img.get_pixels

model = OnnxRuntime::Model.new("model.onnx")
result = model.predict({"inputs" => [pixels]})

p result["num_detections"]

ankane

Devise email change notifications with encrypted attributes in Rails 5.2

Add to the Devise initializer:

config.send_email_changed_notification = true

Use this PR for attr_encrypted

ankane

#include <stdio.h>
#include <inttypes.h>
#include <math.h>

// Function, which calculates N, p and r from opslimit and memslimit copied from
// libsodium/crypto_pwhash/scryptsalsa208sha256/pwhash_scryptsalsa208sha256.c
int pickparams(unsigned long long opslimit, const size_t memlimit,
        uint32_t *const N_log2, uint32_t *const p, uint32_t *const r) {
    unsigned long long maxN;
    unsigned long long maxrp;

ankane

require "bundler/inline"

gemfile do
  source "https://rubygems.org"

  gem "activerecord", require: "active_record"
  gem "activejob", require: "active_job"
  gem "sqlite3"
  gem "searchkick", git: "https://github.com/ankane/searchkick.git"
end

ankane

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

• They are the people who get things done. Effective Engineers produce results.

Adopt the Right Mindsets

ankane

Checkout the blog post for the whole story.

Setup Bower and install components:

npm install -g bower
bower install

Before deploying to Heroku, switch to the multi buildpack:

ankane

-- median
-- http://www.postgresonline.com/journal/archives/67-Build-Median-Aggregate-Function-in-SQL.html

CREATE OR REPLACE FUNCTION array_median(numeric[])
  RETURNS numeric AS
$$
    SELECT CASE
    WHEN array_upper($1,1) = 0 THEN null
    WHEN mod(array_upper($1,1),2) = 1 THEN asorted[ceiling(array_upper(asorted,1)/2.0)]
    ELSE ((asorted[ceiling(array_upper(asorted,1)/2.0)] + asorted[ceiling(array_upper(asorted,1)/2.0)+1])/2.0) END

ankane

= javascript_include_tag "http://maps.googleapis.com/maps/api/js?sensor=false"

#map style="height: 500px;"

javascript:
  var pings = #{@pings.to_json(root: false).html_safe};

  $(document).ready( function() {
    var mapOptions = {
      zoom: 13,

ankane

Benchmark Bundler

Because loading gems can take longer than you think

Now available as a gem - get it here