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# utils/numbers
#
#   Utilities to formating numbers in a human-readable way.
#
#   * toSuffixedNumber - for numbers greater than or equal to 1000,
#       the output is a suffixed number
#   * toDelimitedNumber - returns a delimited string representation
#       of the number

define ->

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define ['jquery', 'underscore'], ($, _) ->

    Deferrable =
        deferred: {}

        initialize: ->
            @pending()
            # Takes an object of method names and flags for implicitly
            # wrapping class methods in a deferred execution
            for method, once of @deferred

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# Reference Backbone ajax function
_ajax = Backbone.ajax

requestQueue = []
requestPending = false

sendRequest = (options, promise, trigger=true) ->
    options = _.clone options
    if trigger
        requestPending = true    

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require(['jquery'], function($) {
    var data,
        form = $('#queue-download-form'),
        url = queueDownloadForm.attr('action');

    form.on('submit', function(event) {
        event.preventDefault();

        // for JSON
        data = JSON.stringify(form.serializeArray());

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groupBy => HTML

jsFiddle Example

Takes an object with the format key => list and a list of keys to exclude from the table. Returns an array of groups. The keys should be the ones used as the iterator or by the iterator when performing the group by to prevent redundancy of data in the output table.

Since JavaScript object keys can only be numbers or strings, if the data was grouped by multiple keys, the group key must be a string delimited by some value. By default, the separator is a comma ,.

groupByHTML(groups, keys[, sep])

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sortedGroupBy

jsFiddle Example

Convenience function for performing a groupBy on a list then a sortBy on the resulting groups using Underscore methods.

sortedGroupBy(list, groupByIterator, sortByIterator)

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Client-side Environment Boilerplate

Sets up the environment for a client-side application.

• Remove jQuery as a global
• Change Underscore template parsers to not use ERB-style tags
• Setting a reasonable timeout for AJAX requests
• Define a AJAX queue manager for Backbone, inspired by @maccman's Spine implementation (Backbone as of 87c9b17a required)
  • GET requests are executed outside of the queue
• onbeforeunload handler defined for prevent navigation when there are pending requests

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// Example directory structure
// js/
//    package.js
//    package/
//        mod1.js
//        mod2.js
//        mod3.js
require(['package'], function(pack) {
    var obj1 = new pack.Mod1Class(),
        obj2 = new pack.Mod2Class();

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from datetime import datetime
from django.db import models
from django.core.cache import cache

class ModifiedModel(models.Model):
    modified = models.DateTimeField()

    class Meta(object):
        abstract = True

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class Song(VersionedModel):
    """
    >>> song = Song(title='Here Come the Sun')
    >>> song.save()
    >>> cache.get('music.song-1,1)
    1
    >>> song.title = 'Here Comes the Sun'
    >>> song.save()
    >>> cache.get('music.song-1,1)
    >>> cache.get('music.song-1,2)