swift - 从字符串中删除停用词而不修剪 Swift 中的其他词

Question

我正在使用以下代码从字符串中删除停用词，但它最终修剪其他词，我只想删除特定词 来自字符串而不修剪其他单词。

 import Foundation

var sentence = "God have created the creatures at his best"
let wordToRemove = "at"


if let range = sentence.range(of: wordToRemove) {
   sentence.removeSubrange(range)
}

print(sentence) // God have creed the creures  his best

Answer 1

先写一个内建类String的扩展

extension String {

    func contains(word : String) -> Range<String.Index>?
    {
        return self.range(of: "\\b\(word)\\b", options: .regularExpression)
    }
}

然后编写下面的代码来从句子中删除特定的单词

var sentence = "God have created the creatures at his best"
let wordToRemove = "at"

if let range  = sentence.contains(word: wordToRemove) {
     sentence.removeSubrange(range)
     print(sentence)
}

 //Output : God have created the creatures  his best