Get the first word in a String of words & spaces - Substring first word before space

Question

I have a string that has words and spaces, "2h 3m 1s". I want to extract 2h out of it; so get everything before first space.

var date = "1,340d 1h 15m 52s"  // I want to extract "1,340d".

What is the best practice of doing it? What substring function is the best approach?

Answer 1

If your string is heavy, componentsSeparatedByString() tends to be faster.

Swift 2:

var date = "1,340d 1h 15m 52s"
if let first = date.componentsSeparatedByString(" ").first {
    // Do something with the first component.
}

Swift 3/4/5:

if let first = date.components(separatedBy: " ").first {
    // Do something with the first component.
}