I want to have a a h5 "Posts" at left and the button "Btn" at right, however the "Btn" is not at right is at the left of the .col div, do you know how to proper position the button at right? With 'justify-content-end' is not working.
Also I want to have 4 cards with equal width in each row, but do you know why the cards appear so long? Is not possible that the card is more like a square and not a rectangle?
Example: http://jsfiddle.net/1b790tL5/
HTML:
<div class="container">
<div class="row">
<div class="col">
<h5 class="display-5 font-weight-bold text-dark">Posts</h5>
</div>
<div class="col justify-content-end">
<a href="" class="btn btn-primary">Btn</a>
</div>
</div>
</div>
<div class="container mt-4">
<div class="card-deck">
<div class="card p-0 shadow">
<img class="card-img-top border-bottom" src="https://via.placeholder.com/280" alt="Card image cap">
<div class="card-body">
<h5 class="card-title text-dark font-weight-bold">Card title</h5>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional
content.</p>
</div>
</div>
<div class="card p-0 shadow">
<img class="card-img-top border-bottom" src="https://via.placeholder.com/280" alt="Card image cap">
<div class="card-body">
<h5 class="card-title text-dark font-weight-bold">Card title</h5>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional
content. This content is a little bit longer.</p>
</div>
</div>
<div class="card p-0 shadow">
<img class="card-img-top border-bottom" src="https://via.placeholder.com/280" alt="Card image cap">
<div class="card-body">
<h5 class="card-title text-dark font-weight-bold">Card title</h5>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional
content. This content is a little bit longer.</p>
</div>
</div>
<div class="card p-0 shadow">
<img class="card-img-top border-bottom" src="https://via.placeholder.com/280" alt="Card image cap">
<div class="card-body">
<h5 class="card-title text-dark font-weight-bold">Card title</h5>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional
content. This content is a little bit longer.</p>
</div>
</div>
</div>
</div>