如何檢查數組中的句子在Swift中是否包含確切的單詞？

Question

例如，我有以下數組：

var reviews = ["Skating is good in Austria", 
"I loved the Spanish food, it had so many varieties and 
it was super super delicious. The price was a little bit high but 
it was worth it. People who don't like spicy food might need 
to think twice as it could be a little bit problematic for them.", 
"I didn’t like the Indian food!", 
"People were really friendly, I enjoyed being there."]

var words = ["Skating", "Food", "Climbing"]

現在，我想檢查一下這些評論是否包含我的一句話。

面臨的挑戰是：一個或多個評論可以包含這些單詞，我想找到這些評論，並將它們添加到數組中並打印。

為此，我這樣做：

var arr = [String]()

for review in reviews {
    for word in words {
        if review.containsString(word) {
            arr.append(review)
        }
    }
    print(arr)
}

但這僅顯示第一句話：

["Skating is good in Austria"]

因此，我想檢查一個或多個評論是否包含數組中的這些單詞，然后將所有這些匹配的評論放入arr數組中。

有人可以幫我嗎？ 我很困惑為什么只需要進行一次審核並在之后停止

Answer 1

您需要將print語句移出循環。

像這樣：

var arr = [String]()

for review in reviews {
    for word in words {
        if review.containsString(word) {
            arr.append(review)
        }
    }
}
print(arr)

另外，如果您不想得到重復的評論，我將使用set而不是數組： var arr = Set<String>()

另外，可能是需要區分大小寫的字符串比較的情況。 在您的單詞數組中按food更改Food ，然后重試。

要使完整的不區分大小寫的循環正常工作，請嘗試以下操作：

for review in reviews {
    for word in words {
        if review.lowercaseString.containsString(word.lowercaseString) {
            arr.append(review)
        }
    }
}
print(arr)

Answer 2

如果您想忽略字符串的大小寫，只需使用array filter方法以這種方式嘗試，它將減少循環代碼。

var predicateString = [String]()
for word in words {
    predicateString(String(format:"SELF CONTAINS[cd] %@", word)
}
let predicate = NSPredicate(format: "%@",predicateString.joined(separator: " || "));
let filteredArray = reviews.filter { predicate.evaluateWithObject($0) };
print(filteredArray)

Answer 3

您可以使用函數式編程

首先，讓我們創建一個小寫關鍵字數組（我假設您要區分大小寫）。

let keywords = words.map { $0.lowercaseString }

下一個

let matchingSentences = reviews.filter { sentence  in
    let lowerCaseSentence = sentence.lowercaseString
    return keywords.contains { keyword in sentence.rangeOfString(keyword) != nil }
}

結果

matchingSentences.forEach { print($0) }

Skating is good in Austria
I loved the Spanish food, it had so many varieties and it was super super delicious. The price was a little bit high but it was worth it. People who don't like spicy food might need to think twice as it could be a little bit problematic for them.
I didn’t like the Indian food!

短版

let res = reviews.filter { sentence in keywords.contains { sentence.lowercaseString.rangeOfString($0) != nil } }