How do I take a substring to the first index of a character?

Question

I\'m very new to Swift; I\'ve spent the morning reading StackOverflow and trying many strategies, in vain, to accomplish the following:

I have a string, say \"12345 is

Answer 1

Something like this should work:

myMessage.substringToIndex(myMessage.characters.indexOf(" ")!)

Note that in this code I force unwrapped the optional. If you're not guaranteed to have that space in the string, it might make more sense to have the index in a optional binding.

With optional binding, it would look something like this:

if let index = myMessage.characters.indexOf(" ") {
    let result = myMessage.substringToIndex(index)
}