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Rails Models

Generating models

$ rails g model User

Associations

belongs_to

has_one

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// Question 1
function incorrectChars( input, output) { 
  const inputString = input.toLowerCase();
  const outputString = output.toLowerCase();
  const multiple = outputString.length / inputString.length;
  let incorrect = 0;

  for ( let i = 0; i < outputString.length - inputString.length; i + inputString.length ) {
    const outputSubString = outputString.substring(i, i+inputString.length);
    console.log('outputSubString: ' + outputSubString)

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Cheatsheet: pyenv, virtualenvwrapper, and pip

Installation (for Mac OS)

Install pyenv with brew

brew update
brew install pyenv

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'use strict';

var keys = [];
var controlAlt = [ 'ctrl', 'alt' ];
var margin = 0;
var increment = 0.1

function log() {
  Phoenix.log(JSON.stringify(arguments[0], true, 2));
}

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import React, { Component } from 'react'
import UserDetails from './UserDetails'

/**
 * This utility function allows function calls to be debounced.
 * @param {Function} func Function that requires debouncing
 * @param {Number} wait Wait time in milliseconds between successive invocations
 */
const debounce = (func, wait) => {
  let timeout

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from django.core.cache import cache as core_cache

'''
refer:
    http://stackoverflow.com/questions/20146741/django-per-user-view-caching
    https://djangosnippets.org/snippets/2524/
'''


def cache_key(request):

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var Table = React.createClass({

    render: function render() {
        var _self = this;

        var thead = React.DOM.thead({},
            React.DOM.tr({},
                this.props.cols.map(function (col) {
                    return React.DOM.th({}, col);
            })));

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{
    "AL": "Alabama",
    "AK": "Alaska",
    "AS": "American Samoa",
    "AZ": "Arizona",
    "AR": "Arkansas",
    "CA": "California",
    "CO": "Colorado",
    "CT": "Connecticut",
    "DE": "Delaware",

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import csv
from StringIO import StringIO
from django.http import StreamingHttpResponse


class StreamCSV(object):

    def __init__(self):
        self._buffer = StringIO()
        self._writer = csv.writer(self._buffer)

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import Dexie from 'dexie';
import citiesJson from './cities.json';

const delay = () =>
  new Promise(resolve => {
    setTimeout(() => {
      resolve('');
    }, 1000);
  });