DmitrySoshnikov

/**
 * Sum of all elements including nested arrays.
 *
 * by Dmitry Soshnikov <dmitry.soshnikov@gmail.com>
 * MIT Style License
 */

[1, 2, [3, 4], 5, [6, [7, 8]]].reduce(function collect(previous, current) {
  return (
    (Array.isArray(previous) ? previous.reduce(collect) : previous) +

vctrfrnndz

// Group class for clearing floats

.group {
    &:before,
    &:after {
        content: " ";
        display: table;
    }

    &:after {

chriscoyier

@media only screen and (min-width: 320px) {

  /* Small screen, non-retina */

}

@media
only screen and (-webkit-min-device-pixel-ratio: 2)      and (min-width: 320px),
only screen and (   min--moz-device-pixel-ratio: 2)      and (min-width: 320px),
only screen and (     -o-min-device-pixel-ratio: 2/1)    and (min-width: 320px),