Remove whitespaces in string with Scala

Question

I want to remove the whitespaces in a string.

Input: "le ngoc ky quang"  
Output: "lengockyquang"

I tried the replace and replaceAll methods but that did't work.

String in scala is java.lang.String, already has an answer here: http://stackoverflow.com/questions/5455794/removing-whitespace-from-strings-in-java — Samar, Aug 25 '16 at 03:57

score 31 · Answer 1 · answered Aug 25 '16 at 03:54

31

Try the following:

input.replaceAll("\\s", "")

answered Aug 25 '16 at 03:54

Nyavro

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score 22 · Answer 2 · edited Feb 01 '22 at 14:47

22

You can filter out all whitespace characters.

"With spaces".filterNot(_.isWhitespace)

edited Feb 01 '22 at 14:47

Branislav Lazic

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answered Dec 18 '16 at 22:05

Volodymyr Kozubal

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Probably the most correct answer. `isWhitespace` will also check for tabs and break lines. – Branislav Lazic Feb 01 '22 at 14:53

score 7 · Answer 3 · edited Mar 12 '19 at 17:17

7

Consider splitting the string by any number of whitespace characters (\\s+) and then re-concatenating the split array,

str.split("\\s+").mkString

edited Mar 12 '19 at 17:17

thebluephantom

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answered Aug 25 '16 at 05:24

elm

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Nice that this takes out `\n` characters as well - if that is a use case one has. – reverend Oct 29 '19 at 16:13

score 4 · Answer 4 · answered Aug 25 '16 at 03:54

4

val str = "le ngoc ky quang"
str.replace(" ", "")

//////////////////////////////////////
scala> val str = "le ngoc ky quang"
str: String = le ngoc ky quang

scala> str.replace(" ", "")
res0: String = lengockyquang

scala>

answered Aug 25 '16 at 03:54

TheKojuEffect

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score 3 · Answer 5 · answered Jul 26 '19 at 11:47

3

According to alvinalexander it shows there how to replace more than white spaces to one space. The same logic you can apply, but instead of one space you should replace to empty string.

input.replaceAll(" +", "")

answered Jul 26 '19 at 11:47

azatprog

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Remove whitespaces in string with Scala

5 Answers5