iamatypeofwalrus

// Per the BNR iOS programming guide's chapter on creating BNRItem
import Cocoa
import Foundation

extension Character {
    func unicodeIntValue() -> UInt32
    {
        let str = String(self)
        return str.unicodeScalars[str.unicodeScalars.startIndex].value
    }

iamatypeofwalrus

Calendar

• ⌘-t --> Go to Today

Terminal

• ctrl-a --> go to beginning of terminal line
• ctrl-e --> go to end of terminal line
• alt-click --> go to character

iamatypeofwalrus

pluck_in_batches

Sometimes you need to iterate over a ton of items and you don't want the overhead of creating AR objects out of all of them. Hell, you only need a few things! Well, #pluck has your back.

But what if you want to iterate over many tonnes of items?

Pluck in batches to the rescue!

This isn't the exact code that I use in my code base, but it is damn close.

iamatypeofwalrus

// An intersting pattern for testing, but you can use the check anywhere
import "testing"

func TestCheckingChannel(t *testing.T) {
  stop := make(chan bool)

  // Testing some fucntion that SHOULD close the channel
  func (stop chan bool) {
    close(chan)
  }(stop)

iamatypeofwalrus

Why?

Atom can automagically picks up any tags file in your current directory which enables you to:

• shift+cmd+r search for any function in your project
• alt+cmd+down GoTo a function declaration

How

Get brew if you don't already have it. Then:

brew install ctags

iamatypeofwalrus

Why?

Having to remeber what the boot2docker ip address sucks, wouldn't it be better to access it like localhost?

You can!

First you need to get the boot2docker ip address. You can get that in terminal:

$ boot2docker ip

On my computer I get:

iamatypeofwalrus

 
# Official docs are a _bit_ light on specifcs
# http://ruby-doc.org/core-2.0.0/Kernel.html#method-i-set_trace_func
#
# There are other options if you are interested in a general trace:
# * ruby -r tracer your_script.rb
# * https://ruby-doc.org/core-2.3.0/TracePoint.html
#
# What I'd like to be able to do is create a helper module / class that can be added to any class like so:
# 

iamatypeofwalrus

# Run and fail
#   AWS_ACCESS_KEY_ID=*** ruby connection_pool_issue.rb
#
# Does not crash
#   empty_connection_pools_after_fork=true ruby connection_pool_issue.rb
#
# Hypothesis:
#
# the Aws SDK maintains a ConnectionPool in Seahorse. After fork
# file descriptors are shared between the parent process and any child processes.

iamatypeofwalrus

---
AWSTemplateFormatVersion: '2010-09-09'
Description: 'Backup DynamoDB table to S3, convert export to Parquet, and add table to Athena'
Parameters:
  TableName:
    Description: DynamoDB table name 
    Type: String
  BackupMaximumConsumedReadThroughput:
    Description: Percentage of table read throughput a backup can use. Expressed between 0.01 and 1.0. Defaults to 20% of available read throughput
    Type: Number

iamatypeofwalrus

---
AWSTemplateFormatVersion: '2010-09-09'
Description: 'Common resources for DynamoDB backups'
Resources:
  DynamoDBBackupsBucket:
    Type: "AWS::S3::Bucket"
    Properties:
      BucketName:
        Fn::Join:
        - "-"