When you first look at which statement to use to iterate through an ArrayList collection, the foreach statement stands out. It's syntax is concise and readable as well as no extra lines of code are needed to extract the element you want to work with. But...[pause for effect]...if the collection is...

There are 3 very handy list functions which make dealing with lists a breeze: Map, Filter and Reduce. But along the way of writing them, an important principle of IEnumerator<> comes up.

Lots of people suggest a ForEach method would be a good addition to the base class framework. This is why I don't think it would be, even though our core library has an implementation of it.

One thing with the For Loop in JavaScript is it doesn't seem to be very well documented that you can use it to do an equivalent of a ForEach loop. Here's a short example of doing the ForEach loop equivalent in JavaScript using the "in" keyword.

Small example of how to use Action delegate to perform some action on all elements of a collection.

A comparision of a foreach() loop and manually looping by calling GetEnumerator() and MoveNext()

Have you ever had a collection made of several types which all derive from the same base class? How many times have you needed to iterate the whole collection and check each element to make sure its the type that you want to work with? Here's how to do you type checking completely inline inside of...