Difference between revisions of "Code Snippet: Random Strings"
From Coder Merlin
(Created page with "== Select a Random String from an Array == <syntaxhighlight lang="swift"> // Select a random string from an array and print the result let verbs = ["walk", "jump", "run", "swi...") |
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if let verb = verbs.randomElement() {// Note: randomElement() returns an optional string | if let verb = verbs.randomElement() {// Note: randomElement() returns an optional string | ||
print(verb) | print(verb) | ||
} | |||
</syntaxhighlight> | |||
<syntaxhighlight lang="swift"> | |||
// Select multiple random strings from two arrays and print the results | |||
let geographicFeatures = ["river", "lake", "ocean", "mountain", "desert"] | |||
let verbAndPrepositions = ["walk to", "jump over", "run to", "dance around"] | |||
for _ in 0 ..< Int.random(in: 3...5) { | |||
let verb = verbAndPrepositions.randomElement()! | |||
let geographicFeature = geographicFeatures.randomElement()! | |||
print("\(verb) the \(geographicFeature)") | |||
} | } | ||
</syntaxhighlight> | </syntaxhighlight> |
Revision as of 00:26, 4 December 2018
Within these castle walls be forged Mavens of Computer Science ...
— Merlin, The Coder
Select a Random String from an Array[edit]
// Select a random string from an array and print the result
let verbs = ["walk", "jump", "run", "swim", "dance"]
let verb = verbs[Int.random(in:0..<verbs.count)]
print(verb)
// Select a random string from an array and print the result (with syntactic sugar)
let verbs = ["walk", "jump", "run", "swim", "dance"]
if let verb = verbs.randomElement() {// Note: randomElement() returns an optional string
print(verb)
}
// Select multiple random strings from two arrays and print the results
let geographicFeatures = ["river", "lake", "ocean", "mountain", "desert"]
let verbAndPrepositions = ["walk to", "jump over", "run to", "dance around"]
for _ in 0 ..< Int.random(in: 3...5) {
let verb = verbAndPrepositions.randomElement()!
let geographicFeature = geographicFeatures.randomElement()!
print("\(verb) the \(geographicFeature)")
}
Shuffle an Array[edit]
let verbs = ["walk", "jump", "run", "swim", "dance"]
let shuffledVerbs = verbs.shuffled()
for verb in shuffledVerbs {
print(verb)
}