gmarik

How to disable Gem deprecation warnings

Just copy content to corresponding files

gmarik

Some improvements have been made for parser and lexer grammars in Jison 0.3 (demonstrated in the FlooP/BlooP example below.)

For lexers:

• Patterns may use unquoted characters instead of strings
• Two new options, %options flex case-insensitive
• flex: the rule with the longest match is used, and no word boundary patterns are added
• case-insensitive: all patterns are case insensitive
• User code section is included in the generated module

gmarik

@rem Do not use "echo off" to not affect any child calls.
@setlocal

@rem Get the abolute path to the parent directory, which is assumed to be the
@rem Git installation root.
@for /F "delims=" %%I in ("%~dp0..") do @set git_install_root=%%~fI
@set PATH=%git_install_root%\bin;%git_install_root%\mingw\bin;%PATH%

@if not exist "%HOME%" @set HOME=%HOMEDRIVE%%HOMEPATH%
@if not exist "%HOME%" @set HOME=%USERPROFILE%

gmarik

Option 1: Command-line download extension as zip and extract

extension_id=jifpbeccnghkjeaalbbjmodiffmgedin   # change this ID
curl -L -o "$extension_id.zip" "https://clients2.google.com/service/update2/crx?response=redirect&os=mac&arch=x86-64&nacl_arch=x86-64&prod=chromecrx&prodchannel=stable&prodversion=44.0.2403.130&x=id%3D$extension_id%26uc" 
unzip -d "$extension_id-source" "$extension_id.zip"

Thx to crxviewer for the magic download URL.

gmarik

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
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 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

gmarik

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

gmarik

(use '[clojure.core.match :only [match]])

(defn evaluate [env [sym x y]]
  (match [sym]
    ['Number]   x
    ['Add]      (+ (evaluate env x) (evaluate env y))
    ['Multiply] (* (evaluate env x) (evaluate env y))
    ['Variable] (env x)))
    
(def environment {"a" 3, "b" 4, "c" 5})

gmarik

Learning Google Apps Script

The best place to learn more about Google Script is the official documentation available at developers.google.com. Here are other places that will help you get up to speed.

1. MAKING A GMAIL BOT WITH APPS SCRIPT AND TYPESCRIPT
2. Google Apps Scripts - Snippets by +Amit Agarwal
3. Apps Script Starter - Create Google Apps Script projects locally inside VS Code.
4. Digital Inspiration by +Amit Agarwal - Google Addons
5. Awesome Google Scripts by +Amit Agarwal
6. Build with Google Apps Script - Setup a local development environment for Apps Script

gmarik

class Fixnum 
  def upto2(n)
    (self..n).to_a.map{|k| yield k }
  end
end

class A
  def sum(n)
    sum = 0
    1.upto(n) do |i|

gmarik

module Kernel

  alias require_orig_bench require

  def require(*args)
    from = Time.now.to_f
    $__deep ||= 0; $__deep += 1
    require_orig_bench(*args)
    $stderr.puts %Q[ #{"  " * ($__deep - 1) } #{(Time.now.to_f - from)} in #{args.inspect} ]
    $__deep -= 1