{"id":2902,"date":"2014-09-21T15:56:10","date_gmt":"2014-09-21T19:56:10","guid":{"rendered":"http:\/\/www.acarlstein.com\/?p=2902"},"modified":"2014-09-21T15:56:10","modified_gmt":"2014-09-21T19:56:10","slug":"playing-with-swift","status":"publish","type":"post","link":"http:\/\/blog.acarlstein.com\/?p=2902","title":{"rendered":"Playing with Swift"},"content":{"rendered":"

Let say that we have an array of strings:<\/p>\n

var cities: [String] = [“San Francisco”, “Denver”];<\/span><\/em><\/p>\n

You can change one string elements of this array given an index.
\nIn this case we change from “San Francisco” to Miami:<\/p>\n

cities[0] = “Miami”;<\/span><\/em><\/p>\n

 <\/p>\n

Now, let assume we wish to print the last letter of the first string in the array.<\/p>\n

This first intent fails:<\/p>\n

println(cities[0][advance(cities[0].startIndex, 4)]);<\/span><\/em><\/p>\n

This will fail too:<\/p>\n

let index = 4;<\/span><\/em>
\nprintln(cities[0][index]);<\/span><\/em><\/p>\n

 <\/p>\n

However, this will success:
\nprintln(cities[0][advance(cities[0].startIndex, 4)]);<\/span><\/em><\/p>\n\n