Adding key/value pairs to a dictionary
<p>i am using a dictionary to store some key value pairs and had a question on the best way to populate the dictionary. I need to do some other operations in order to find and add my key value pairs to my dictionary. After those operations i may have found a key/value to add to the dictionary or i could have found nothing. My question is how i should populate the dictionary. Should i use a function that returns a key value pair if found and otherwise an empty one contained within a dictionary.Add(function()) call? i dont want to add empty key/value pairs to the dictionary so im not sure how the return call for that function would work. Or should i pass the dictionary to the function and add to it if needed? like </p>

<pre><code>function(dictionary) 
{ if (pair found) {dictionary.add(pair)}}
</code></pre>
