How to check whether a string contains any words from an array

Swift version: 5.0

Paul Hudson    @twostraws    March 28th 2019

You should already know that you can check whether a string contains a single word like this:

let string = "The rain in Spain"
let stringResult = string.contains("rain")

You should also know that you can check an array of strings to see whether a particular string is in there, like this:

let words = ["clouds", "rain", "wind"]
let arrayResult = words.contains("rain")

Well, both those contains() methods can be combined together to form a new meaning: “do any of the words in this array exist in this string?” like this:

let combinedResult = words.contains(where: string.contains)

Available from iOS 8.0 – learn more in my book Pro Swift

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