WebDec 12, 2024 · 1. Using Plain Java To get a substring having the first 4 chars first check the length of the string. If the string length is greater than 4 then use substring (int beginIndex, int lastIndex) method. This method takes the start and last index positions to return the substring within those indices. WebThese operations are supported by two implicit conversions. The first, low-priority conversion maps a String to a WrappedString, which is a subclass of …
JavaScript to keep only first N characters in a string
WebAug 29, 2024 · The first approach uses a widely known String method: substring (). This method allows extracting a sub-section of a given String by passing two arguments to … WebNov 8, 2024 · Firstly, we'll get the index of the first space character. Then, we'll get the substring until this index which will be our result, the person's name: public String getFirstWordUsingSubString(String input) { return input.substring ( 0, input.indexOf ( " " )); } If we pass the same input String as before, our method will return the String “Roberto”. dr sivalingam cleveland clinic
Scala - Strings - tutorialspoint.com
WebMar 26, 2024 · When coming to Scala from Java, the syntax for accessing a character at a position in a Scala String is an interesting thing. You could use the Java charAt method: scala> "hello".charAt (0) res0: Char = h However, the preferred (proper) approach to access a character in a String is to use Scala’s Array notation: WebAug 29, 2024 · The first approach uses a widely known String method: substring (). This method allows extracting a sub-section of a given String by passing two arguments to define the start and end index of the substring: WebJan 14, 2012 · def firstLine (f: java.io.File): Option [String] = { val src = io.Source.fromFile (f) try { src.getLines.find (_ => true) } finally { src.close () } } The function returns Option [String] instead of List [String], since it always returns one or none. That's more idiomatic Scala. coloring page of a banana