asked on

noX functional program

Hi,

http://codingbat.com/prob/p105967

I wrote my code as below and failing some tests

public List<String> noX(List<String> strings) {
   strings.replaceAll(x -> "");
  return strings;
}

Open in new window

Expected	Run		
noX(["ax", "bb", "cx"]) → ["a", "bb", "c"]	["", "", ""]	X	
noX(["xxax", "xbxbx", "xxcx"]) → ["a", "bb", "c"]	["", "", ""]	X	
noX(["x"]) → [""]	[""]	OK	
noX([""]) → [""]	[""]	OK	
noX([]) → []	[]	OK	
noX(["the", "taxi"]) → ["the", "tai"]	["", ""]	X	
noX(["the", "xxtxaxixxx"]) → ["the", "tai"]	["", ""]	X	
noX(["this", "is", "the", "x"]) → ["this", "is", "the", ""]	["", "", "", ""]	X	
other tests
		X

Open in new window

how to fix and improve my code, please advise

ste5an

Same as the other thread: Sort out your tags. Java or .NET?

SOLUTION

no body

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

gudii9

ASKER

how to do using lamda expression?

gudii9

ASKER

something like

strings.replaceAll(x -> "");

rrz

Here is one way.

import java.util.*;
import java.util.stream.*;
public class X {
	public static void main(String[] args) {
		List<String> list = Arrays.asList("xxax", "xbxbx", "xxcx", "zzz");
		System.out.println(noX(list));
	}
	public static List<String> noX(List<String> strings) {
		return strings.stream().map(s -> s.replaceAll("x","")).collect(Collectors.toList());
    }	
}

Open in new window

gudii9

ASKER

what is Colectors what is stream and collect methods here? please advise

rrz

Discussion moved to
https://www.experts-exchange.com/questions/29041669/Collectors-stream-collect-method.html
That way we all can be on the same page.

ASKER CERTIFIED SOLUTION

rrz

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial