大佬教程收集整理的这篇文章主要介绍了arrays – Array包含一个完整的子数组，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
let mainArray = ["hello","world","it's","a","beautiful","day"] contains(mainArray,["world","it's"]) // would return true contains(mainArray,"it"]) // would return false contains(mainArray,"a"]) // would return false - not adjacent in mainArray
func indexOf(data:[String],_ part:[String]) -> Int? {
// This is to prevent construction of a range from zero to negative
if part.count > data.count {
return nil
}
// The index of the match Could not exceed data.count-part.count
return (0...data.count-part.count).indexOf {ind in
// Construct a sub-array from current index,// and compare its content to what we are looking for.
[String](data[ind..<ind+part.count]) == part
}
}
您可以按如下方式使用它：
let mainArray = ["hello","day"]
if let index = indexOf(mainArray,"it's"]) {
print("Found match at \(index)")
} else {
print("No match")
}
编辑为通用数组的扩展…
现在可以将其用于Equatable类型的任何同类数组.
extension Array where Element : Equatable {
func indexOfContiguous(subArray:[Element]) -> Int? {
// This is to prevent construction of a range from zero to negative
if subArray.count > self.count {
return nil
}
// The index of the match Could not exceed data.count-part.count
return (0...self.count-subArray.count).indexOf { ind in
// Construct a sub-array from current index,// and compare its content to what we are looking for.
[Element](self[ind..<ind+subArray.count]) == subArray
}
}
}
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