backslash and parentheses problem in javascript

Question

whats the problem with backslash and parentheses in this code? it spesificly appears in "else if" line

function roofFix(s, x){
  if(x.includes("/")){
     var xIndex1 = x.indexOf("/");
  
    if( s[xIndex1] == " " ){
        return true
      }else{
        return false
      }
  }else if(x.includes("\")){
    if( s[xIndex1] == " " ){
        return true
      }else{
        return false
      }
  
  }else{
    return false
  }
 


}
roofFix('   h c ', '__/____')

The backslash has a special meaning when used in a string. – Andreas Jun 07 '20 at 13:36 — Andreas, Jun 07 '20 at 13:36

score 1 · Answer 1 · 2020-06-07T13:44:36.407

1

\ is used for escape character. If you want to compare with \ use \\.

function roofFix(s, x){
  if(x.includes("/")){
     var xIndex1 = x.indexOf("/");

    if( s[xIndex1] == " " ){
        return true
      }else{
        return false
      }
  }else if(x.includes("\\")){
    if( s[xIndex1] == " " ){
        return true
      }else{
        return false
      }

  }else{
    return false
  }



}
roofFix('   h c ', '__/____')

edited Jun 07 '20 at 13:44

answered Jun 07 '20 at 13:33

1

It's generally helpful to mention at least briefly exactly what you suggest be changed. – Pointy Jun 07 '20 at 13:34

score 1 · Answer 2 · answered Jun 07 '20 at 13:35

1

With the \ you can escape special characters in a string. Right now you escape the " character. So add another \ to escape the backslash character, like below. And it should work.

function roofFix(s, x){
  if(x.includes("/")){
     var xIndex1 = x.indexOf("/");
  
    if( s[xIndex1] == " " ){
        return true
      }else{
        return false
      }
  }else if(x.includes("\\")){
    if( s[xIndex1] == " " ){
        return true
      }else{
        return false
      }
  
  }else{
    return false
  }
 


}
roofFix('   h c ', '__/____')

answered Jun 07 '20 at 13:35

Camille Sébastien Niessen

1,282
14
28

when i insert backslash in arguments instead of slash it should return true, but it return false!! – emyy96 Jun 07 '20 at 13:42
1

@emyy96 you have to use `\\\` when you call the function also. – Pointy Jun 07 '20 at 13:54

backslash and parentheses problem in javascript

2 Answers2