ajlai

# Working with Mac OS X 10.7, bash 1.3 (brew), git 1.7.4.4 (brew)
# To get this to work, add a line to source it from your ~/.bashrc
# Credit to Scott Bronson for the following tab completion workaround.
# https://github.com/bronson/dotfiles/blob/731bfd951be68f395247982ba1fb745fbed2455c/.bashrc#L81
# (only for bash, zsh tab completions are done separately.)
__define_git_completion () {
eval "
_git_$2_shortcut () {
COMP_LINE=\"git $2\${COMP_LINE#$1}\"
let COMP_POINT+=$((4+${#2}-${#1}))

ajlai

require 'psych'
require 'pathname'

# Hash-like access to objects stored in yaml files in directory structures.
#
# Examples: 
#  CONFIGS = YamlNav.new(Rails.root + "config")
#
#  CONFIGS["exceptional.yml"]["api-key"]
#  # => the api-key stored in config/exceptional.yml

ajlai

class Object
  # Usage:
  #   maybe_zero.self_unless(&:zero?) || zero_fallback
  #   # => either maybe_zero or zero_fallback (if maybe_zero was zero)
  def self_unless
    self unless yield(self)
  end
  
  # Usage:
  #   maybe_present.self_if(&:present?)

ajlai

# Facilitate manipulating symbols as AR attribute values while storing them as other values in the DB
#
# Examples
#
#   class Example < ActiveRecord::Base
#     serialize :type, SymbolMapper.for(foo: 1, bar: 2, baz: 3)
#   end
#
#   example.type = :foo
#   # => :foo

ajlai

void handleUpload() {
  var elem = query("#upload") as FileUploadInputElement;
  var file = elem.files.first;

  FormData fd = new FormData(null);
  fd.append("username", "ajlai");
  fd.appendBlob("Filename", file);

  var req = new HttpRequest();
  req.open("POST", "/foo");

ajlai

library coalesce;

// To turn the situation where we have:
// var foo;
// if (mightBeNullA != null) {
//   foo = mightBeNullA;
// } else if (mightBeNullB != null) {
//   foo = mightBeNullB;
// } else {
//   foo = 2;

ajlai

Size comparison beween `diff` and `diff -U 0`

ajlai

class Numeric
  # Returns true if for any i, self.round(i) == numeric
  #
  # Usage:
  #
  # 149.835.rounds_to?(0)       #=> true
  # 149.835.rounds_to?(100)     #=> true
  # 149.835.rounds_to?(150)     #=> true
  # 149.835.rounds_to?(149.8)   #=> true
  # 149.835.rounds_to?(149.84)  #=> true

ajlai

WITH date_series_bounds AS (
	SELECT date('2012-12-21') as start, date('2013-08-23') as end
), date_series AS (
	select date(days.start + days.interval)
	from (
		select bounds.start, generate_series(0, bounds.end - bounds.start) AS interval from date_series_bounds bounds
	) as days
)
select * from date_series
-- 2012-12-21