Swift 3: String search backwards -


i want search backwards in string. examples found not running on current swift 3.0. ".backwardssearch" not option available on xcode 8. idea, how can done? example:

let rpos = rindex(sourcestring, searchstring)

or 

let rpos = sourcestring.rindex(of: searchstring)

xcode autocomplete suggest this:

let rpos = sourcestring.range(of:searchstring, options:string.compareoptions.backwards, range:nil, locale:nil)

however, range , locale have defaults of nil, can omit them:

let rpos = sourcestring.range(of:searchstring, options:string.compareoptions.backwards)

and options of type string.compareoptions need last part:

let rpos = sourcestring.range(of:searchstring, options:.backwards)

(thanks @martinr pointing out shortened versions)


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