WebJun 8, 2016 · x.findFirstMatchIn ("abc def") res44: Option [scala.util.matching.Regex.Match] = Some (abc) We can also replace all matches in the string, so if we want to swap one word for another, we can: x.replaceAllIn ("abc def", "gary") res46: String = gary gary You can also apply this to every value in a list, if you want to filter to just items that match. WebThe method findFirstIn () is utilized in the above code to find the first match of the Regular Expression. In order to find all the matching word in the expression, use findAllIn () method. Example using Regex constructor We can use Regex constructor instead or r () method to create a pattern.

Scala で正規表現を使用する Delft スタック

http://duoduokou.com/scala/63087784194653782799.html WebScala中有兩個:::(發音為cons）。 一個是在class List定義的運算符，一個是類 （ List子類），它表示以頭和尾為特征的非空列表。. head :: tail是一個構造函數模式，它從::(head, tail)語法修改::(head, tail) 。::是一個case類，這意味着為它定義了一個提取器對象。 gary beardsley

Scala - Regular Expressions - TutorialsPoint

WebOct 21, 2024 · We create a String and call the r( ) method on it.Scala implicitly converts the String to a RichString and invokes that method to get an instance of Regex. To find a first match of the regular expression, simply call the findFirstIn() method.If instead of finding only the first occurrence we would like to find all occurrences of the matching word, we … Web* * The main difference between this method and `findFirstIn` is that the (optional) return * type for this is [ [scala.util.matching.Regex.Match]], through which more * data can be obtained about the match, such as the strings that precede and follow it, * or subgroups. * * @param source The text to match against. * @return A [ [scala.Option]] … WebThe findFirst methods return an Option which is non-empty if a match is found, or None for no match: val dates = "Important dates in history: 2004-01-20, 1958-09-05, 2010-10-06, … blacksmithing stations