ronaldgreeff

body {
  background: linear-gradient(45deg, #16a596, #1f2d44, #e4566e);
  background-size: 600% 600%;
  height: 100%;

  -webkit-animation: animbackground 30s ease infinite;
  -moz-animation: animbackground 30s ease infinite;
  animation: animbackground 30s ease infinite;
}

ronaldgreeff

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 

ronaldgreeff

const docReady = (fn) => {
  document.readyState === 'complete' || document.readyState === 'interactive' ? setTimeout(fn, 1) : document.addEventListener('DOMContentLoaded', fn);
}

docReady(function() {

});

ronaldgreeff

Tar is an archiving utility in Linux. Extract various archived files in Linux using this utility.
Type the following commands in terminal (Keyboard short cut: Ctrl+Alt+T in Ubuntu):

Extracting .tar.bz2:
tar xvjf filename.tar.bz2 location
Extracting .tar.gz:
tar xvzf filename.tar.gz location

Where:
x — extract

ronaldgreeff

# note that in __init__ method, I have updated an HTML class attribute with form-control to every field of the 
# form so that Bootstrap gets enabled on every field.

from .models import Friend
from django import forms
import datetime

class FriendForm(forms.ModelForm):
    ## change the widget of the date field.
    dob = forms.DateField(

ronaldgreeff

JavaScript Wildcard
- doesn't exist, but can use starts with and ends with:

elem = document.querySelectorAll('form[id^="form"][id$="-s"]');

queryselector mathcing one id but excluding the other
document.querySelectorAll('[id^="primary_container"]:not([id="primary_container-__prefix__"])')

ronaldgreeff

nCols = 4;

for (var c=0; c<nCols; c++) {

    iStart = (c/nCols).toFixed(1)
    iEnd = ( (c+1) /nCols).toFixed(1)

    console.log(
        iStart, iEnd
    )

ronaldgreeff

$( document ).ready()

document.addEventListener('DOMContentLoaded', function() {});

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class MetaInfo(models.Model):
    AVAILABLE_DATATYPES = (('int', 'Integer'),
                           ('floa', 'float'),
                           ('str', 'string'),)

    key = models.CharField(max_length=25)
    value = models.CharField(max_length=100)
    datatype = models.CharField(max_length=4, choices=AVAILABLE_DATATYPES, default='int')
    description = models.CharField(max_length=200)

ronaldgreeff

// for loops are the most performant, but these methods are useful given specific tasks

const items = [
	{ name: 'Bike',			price: 100	},
	{ name: 'TV',				price: 200	},
	{ name: 'Album',		price: 10		},
	{ name: 'Book',			price: 5		},
	{ name: 'Phone',		price: 500	},
	{ name: 'Computer',	price: 1000	},
	{ name: 'Keyboard',	price: 25		},