Hands-On Server-Side Web Development with Swift

Looping through a collection

To loop through a collection, you can use the #for tag. For example, you can pass three users in Context:

let context = ["users": ["John", "Angus", "Mary"]]

In the HTML code, you can loop through an array of items using Leaf's #for tag:

<h2>Event Participants</h2>#for(user in users){ <li>#(user)</li> }

Within the #for loop, you could use the following loop variables to handle more complex situation:

• isFirst: true if the current iteration is the first one
• isLast: true if the current iteration is the last one
• index: count of the current iteration

The following HTML sample code shows how to use the isLast variable to format the last user in a list:

This year's participants are #for(user in users){ #if(isLast) { ...