How to wrap (float) cards in bootstrap 4

After working with this for some time, the floating solution I came up with was unsatisfactory as in some cases, there was a large amount of space below some cards.. After reviewing bootstrap 4 cards, I found a feature that does exactly what I wanted it to: "card-columns"

It lines up your cards into three columns, and re-arranges to one column when the screen size is small.

Bootstrap Docs on card-columns

I came up with a floating-card class that works:

<style>
    .floating-card {
        float: left;
        margin: 5px;
        max-width: 300px;

    }
</style>

Example usage:

    <div class="floating-card sortable">
    <section class="box-typical task-card task">
        <div class="task-card-photo">
            <img src="img/img-task.jpg" alt="">
        </div>
        <div class="task-card-in">
            <div class="btn-group task-card-menu">
                <button type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                    <i class="font-icon-dots-vert-square"></i>
                </button>
                <div class="dropdown-menu dropdown-menu-right">
                    <a class="dropdown-item" href="#"><i class="font-icon font-icon-pencil"></i>Edit</a>
                    <a class="dropdown-item" href="#"><i class="font-icon font-icon-archive"></i>Archive</a>
                    <a class="dropdown-item" href="#"><i class="font-icon font-icon-trash"></i>Delete</a>
                </div>
            </div>
            <div class="task-card-title">
                <a href="#">Create new webpage for sales and marketing stuff</a>
                <span class="task-card-title-label">(BIG)</span>
            </div>
            <div class="progress-compact-style">
                <progress class="progress" value="25" max="100">
                    <div class="progress">
                        <span class="progress-bar" style="width: 25%;">25%</span>
                    </div>
                </progress>
                <div class="progress-compact-style-label">37% done</div>
            </div>
            <div class="task-card-tags">
                <a href="#" class="label label-light-grey">Default</a>
                <a href="#" class="label label-light-grey">Primary</a>
                <a href="#" class="label label-light-grey">Success</a>
            </div>
        </div>
        <div class="task-card-footer">
            <div class="task-card-meta-item"><i class="font-icon font-icon-comments-2"></i>10</div>
            <div class="task-card-meta-item"><i class="font-icon font-icon-clip"></i>24</div>
            <div class="avatar-preview avatar-preview-32">
                <a href="#">
                    <img src="img/photo-64-2.jpg" alt="">
                </a>
            </div>
        </div>
    </section><!--.task-card-->
</div>