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Michael Mahemoff mahemoff

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mahemoff /
Last active Nov 17, 2020
Persistent Connection Services - Pricing

Here I'm interested in a use case of subscribers keeping a permanent connection open (24/7), but with negligible amount of messages. So I'm only concerned about price per connection, not price per message.

AWS API Gateway

$0.25 per million connection minutes

That's $1 per 4 million connection minutes.

mahemoff /
Last active Nov 23, 2021
Vim Terminal Mode - A short introduction

Vim has a Terminal Mode!

Since v8.1 (May 2018), Vim has shipped with a built-in terminal. See or type :help terminal for more info.

Why use this? Mainly because it saves you jumping to a separate terminal window. You can also use Vim commands to manipulate a shell session and easily transfer clipboard content between the terminal and files you're working on.

Key Bindings

mahemoff /
Last active Aug 28, 2020
Generate a strong password in bash

A wrapper for pwgen. Put this in your ~/.bashrc to generate a long & strong password. You can append an optional message to remind yourself of the purpose if you can't immediately transfer it to a credentials repository.

Example usage:

$ hardpass
$ hardpass
$ hardpass new twitter password
### new twitter password
mahemoff /
Last active Aug 26, 2020
Split mbox file into N parts
View gist:df3fa3c6cb9a5de610942ed1ad08ae3a
### Keybase proof
I hereby claim:
* I am mahemoff on github.
* I am mahemoff ( on keybase.
* I have a public key ASAG4tJDQ2HpifE_ViR49cBZWw75E2MeiYX5PpTpxoJADgo
To claim this, I am signing this object:
"body": {
"key": {
mahemoff /
Last active Feb 5, 2020
WikiData Sample JSON dump
mahemoff / bench.rb
Last active Sep 6, 2019
in versus include
View bench.rb
#!/usr/bin/env ruby
require 'benchmark'
require 'active_support/all'
puts 'in', Benchmark.measure {}
puts 'include', Benchmark.measure { (1..99000).include? 90000 }
mahemoff / parallel_array.rb
Created Jun 29, 2019
Extending Array with Parallel gem
View parallel_array.rb
class Array
%w(each map each_with_index map_with_index flat_map any? all?).each { |meth|
define_method("#{meth}_in_parallel") { |&block|
Parallel.send(meth, self) { |item| }