arrays - Swift 如何从短语中获取包含字符数的字典

Question

我想从一个包含单词和每个单词的字符数的字符串创建一个字典。

var textToShow:String = "Try not to become a man of success, but" //rather try to become a man of value. Albert Einstein"

    print(charactersCount(textToShow))

func charactersCount(s: String) -> Dictionary<String, Int> {
    var words = s.componentsSeparatedByString(" ")
    var characterInWordDictionary = Dictionary<String, Int>()

    for word in words {
            characterInWordDictionary[word] = word.characters.count
    }
    return characterInWordDictionary
}

问题是，使用这个方法，它返回

 ["Try": 3, "not": 3, "a": 1, "become": 6, "of": 2, "but": 3, "man": 3, "to": 2, "success,": 8]

还不错，但是:- 首先，字典的顺序不对- 其次，我还想要字典中的空间。

我要返回的是:

["Try": 3, " ": 1, "not": 3, " ": 1, "to": 2, " ": 1, "become": 6, " ": 1, "a": 1, " ": 1, "man": 3, " ": 1, "of": 2, " ": 1, "success,": 8, " ": 1, "but": 3]

如果有人能就此提供任何指导，那就太好了。

谢谢，

Answer 1

首先创建一个空的tupleArray。接下来使用 componentsSeparatedByString 分解您的句子，并使用 forEach 遍历所有元素(单词)以附加该元素($0 = 单词)及其字符计数，后跟一个元组 ("",1)。然后只需使用 popLast 删除那个多余的元组。像这样尝试:

let textToShow = "Try not to become a man of success, but"

var tupleArray:[(String, Int)] = []

textToShow.componentsSeparatedByString(" ")
          .forEach{tupleArray += [($0,$0.characters.count),(" ",1)]}
tupleArray.popLast()
print(tupleArray.description)  // "[("Try", 3), (" ", 1), ("not", 3), (" ", 1), ("to", 2), (" ", 1), ("become", 6), (" ", 1), ("a", 1), (" ", 1), ("man", 3), (" ", 1), ("of", 2), (" ", 1), ("success,", 8), (" ", 1), ("but", 3)]\n"