mdchaney

# words that indicate last name
#
# da
# de
# de la
# del
# di
# dos
# la
# van der

mdchaney

module AudioTime
  # AIFF stores the samples per second as an IEEE 80-bit float, big-endian.
  # This code will convert it to a 32-bit integer.  This is not generalized
  # code for this operation as it ignores the sign bit, part of the mantissa,
  # etc.
  def AudioTime.ieee80_to_long(raw_number)
    discard, mantissa, hidden, exponent, sign = raw_number.reverse.unpack('b80').first.unpack('a32 a31 a1 a15 a1')
    # Get the real exponent - the exponent is really exponent + 1
    exponent = [exponent].pack('b15').unpack('v').first - 16382
    # Now, use the exponent to pull the proper bits from the mantissa.

mdchaney

<!--
  Note that when showing this line if the object is marked_for_destruction? it
  should be hidden.
-->
<tr class="line_item subform fields" id="line_item_<%= f.object.id %>">
  <td>
    <%= f.text_field :field_1, required: true %>
  </td>
  <td>
    <%= f.text_field :field_2, required: true %>

mdchaney

// Based on Stripe's jquery.payment, offers a simple set of utilities
// for handling credit card numbers, expirations, and CVC/CVV2 codes
//
// cc_format_card_number(field)
// cc_format_card_expiry(field)
// cc_format_card_cvc(field)
//
//   "field" may be either the actual DOM element reference or a string
//   with the ID of the DOM element.  This will add event handlers to
//   the field to handle input.

mdchaney

This function takes a string that is in Latin-1 (ISO-8859-1), UTF-8, or plain ASCII and returns the string properly encoded as UTF-8.  In addition, any Microsoft smart quotes (stupid quotes) are replaced with plain ASCII equivalents.  This is useful for reading CSV files or other text files from a web upload and getting to a "known good" state.

mdchaney

This code will replace <select multiple...> boxes with a readonly text input that shows all items selected.  When clicked, a modal will appear giving the user the ability to select items with check boxes.  In the page load function, just call setup_selection_popups().  The select elements should have a class of "replaceable", and of course the multiple attribute must be present.  Everything is contained in one javascript file, and a css file.  Bootstrap 4 uses jquery, so it must be present.  However, jquery is used only to show the modal.

mdchaney

#!/usr/bin/env ruby

@verbose = true

tables_to_clear = ARGV.dup.freeze

# Alternately, clear out everything but these tables
#UNCLEARED_TABLES=%w{ ar_internal_metadata schema_migrations }
#tables_to_clear = (ActiveRecord::Base.connection.tables.sort - UNCLEARED_TABLES).freeze

mdchaney

<!--
  In this file, the fields can be set to "required", but that will
  cause issues.  Specifically, when someone clicks "Remove" the fields
  will be hidden and unless the "required" prop is set to false the form
  will not submit.  Also note that when showing this line if the object
  is marked_for_destruction? it should be hidden. The javascript below
  will handle both these issues.
-->
<tr class="line_item subform fields" id="line_item_<%= f.object.id %>">
  <td>

mdchaney

#!/usr/bin/env ruby

# By Michael Chaney, mdchaney@michaelchaney.com
# Copyright 2017, Michael Chaney Consulting Corporation, All Rights Reserved
#
# Released under GPL v2 License or MIT License
#
# Simple parser for ID3 v2.3 tags in MP3 files.  Provide the filename
# on the command line.

mdchaney

#!/usr/bin/env python

# Demonstration of using Max7219 chip with raspberry pi
# and Python.  Program will count from 0-999 on first three digits
# and 999-0 on second three digits.  Includes code to setup,
# handle clock & latch, and send 16 bits at a time.

import RPi.GPIO as GPIO
import time