Swift:如何在一句话中搜索关键词

Question

我正在尝试在 swift 的句子中进行关键字搜索。

给定的例子

关键字=[“黑色”、“包”、“爱”、“填充”]

Sentence1 = "在充满爱的房子里有一个黑色的袋子"

Sentence2 = "We are in a shop. There is a black bag on the counter"

Sentence3 = "The ocean is beautiful and lovely today"

我想在每个句子中搜索所有关键字以及 return 包含所有关键字和不包含所有关键字的句子。所以输出应该

Sentence1 : 4个关键词 Sentence2 : 3个关键词句子 3：none

这是我试图解决的问题

 var RawSentences = ["There is a black bag in a house filled with love", "We are in a shop. There is a black bag on the counter", " The ocean is beautiful and lovely today"]

 var keywords = ["black", "bag", "love", "filled"]

 for item in RawSentences {
        var matchkeywords: [String] = []
        
        for kword in keywords{
            
            if item.range(of:kword) != nil {
                print("Yes!!!! \(kword) is in \(generatedString)")
                matchkeywords.append(kword)
            }
        }
         
        print("There are \(String(matchkeywords.count)) keyword in \(item)")
        
       
    }

在 swift 中实现这个的最佳方法是什么？

Answer 1

如果您只想匹配整个单词，则需要使用正则表达式并为关键字添加边界。您还可以使您的搜索大小写和变音符号不敏感：

let sentences = ["There is a black bag in a house filled with love",
                 "We are in a shop. There is a black bag on the counter",
                 "The ocean is beautiful and lovely today"]
let keywords = ["black", "bag", "love", "filled"]

var results: [String: [String]] = [:]
for sentence in sentences {
    for keyword in keywords {
        let escapedPattern = NSRegularExpression.escapedPattern(for: keyword)
        let pattern = "\b\(escapedPattern)\b"
        if sentence.range(of: pattern, options: [.regularExpression, .caseInsensitive, .diacriticInsensitive]) != nil {
            results[sentence, default: []].append(keyword)
        }
    }
}

print(results)  // ["There is a black bag in a house filled with love": ["black", "bag", "love", "filled"], "We are in a shop. There is a black bag on the counter": ["black", "bag"]]

如果您想知道关键字在句子中的位置，您只需附加找到的范围而不是关键字：

var results: [String:[Range<String.Index>]] = [:]
for sentence in sentences {
   for keyword in keywords {
       let escapedPattern = NSRegularExpression.escapedPattern(for: keyword)
       let pattern = "\b\(escapedPattern)\b"
       if let range = sentence.range(of: pattern, options: [.regularExpression, .caseInsensitive, .diacriticInsensitive]) {
           results[sentence, default: []].append(range)
       }
   }
}

print(results)  // ["We are in a shop. There is a black bag on the counter": [Range(Swift.String.Index(_rawBits: 1900544)..<Swift.String.Index(_rawBits: 2228224)), Range(Swift.String.Index(_rawBits: 2293760)..<Swift.String.Index(_rawBits: 2490368))], "There is a black bag in a house filled with love": [Range(Swift.String.Index(_rawBits: 720896)..<Swift.String.Index(_rawBits: 1048576)), Range(Swift.String.Index(_rawBits: 1114112)..<Swift.String.Index(_rawBits: 1310720)), Range(Swift.String.Index(_rawBits: 2883584)..<Swift.String.Index(_rawBits: 3145728)), Range(Swift.String.Index(_rawBits: 2097152)..<Swift.String.Index(_rawBits: 2490368))]]

Swift:如何在一句话中搜索关键词

Swift: How to search for keywords in a sentence

algorithm

string-matching

swift