Regex (node js) works on linux but not on window 10-CodePudding

I get the object message via http protocol. This object has the body property.

message.body: 'Denversaurus $24.90'  
    'Bread with sesame, artisan meat, cheddar, Jurassic sauce, mustard and honey, lettuce, tomato and pickles.'

I apply the following regex to that variable:

const regex = new RegExp(/([\w\dà-ú'" ] )R\$ ([\d ,\.] )[\n\r]([ \w\dà-ú'"\.,\ \*\(\)] )/)
const arrayMatch = regex.exec(message.body)

On linux, I get the expected result, but on windows, the arrayMatch variable returns with the value null. And I can't solve it. Does anyone have the solution?

CodePudding user response：

your regex is incorrect . please test all patterns first with online tools like : https://debuggex.com

As for this, I have to make it clear to you that all APIs implemented by Node Js are multiplatform unless the command is specific to a particular operating system. But in the case of regex, it is supported by all operating systems.

Also, when you want to build a regex with a constructor, its argument must be a string.

let regex1 = /(\w )/gi;
//or
let regex2 = new RegExp("(\\w )", "gi")

CodePudding user response：

They must only differ in line ends: "\n" is Linux-style and "\r\n" is Windows-style.

Use

const regex = new RegExp(/([\wà-ú'" ] )R\$ ([\d ,\.] )[\n\r] ([ \wà-ú'"\.,\ \*\(\)] )/)

EXPLANATION

--------------------------------------------------------------------------------
  (                        group and capture to \1:
--------------------------------------------------------------------------------
    [\wà-ú'" ]               any character of: word characters (a-z,
                             A-Z, 0-9, _), 'à' to 'ú', ''', '"', ' '
                             (1 or more times (matching the most
                             amount possible))
--------------------------------------------------------------------------------
  )                        end of \1
--------------------------------------------------------------------------------
  R                        'R'
--------------------------------------------------------------------------------
  \$                       '$'
--------------------------------------------------------------------------------
                           ' '
--------------------------------------------------------------------------------
  (                        group and capture to \2:
--------------------------------------------------------------------------------
    [\d ,\.]                 any character of: digits (0-9), ' ',
                             ',', '\.' (1 or more times (matching the
                             most amount possible))
--------------------------------------------------------------------------------
  )                        end of \2
--------------------------------------------------------------------------------
  [\n\r]                   any character of: '\n' (newline), '\r'
                           (carriage return) (1 or more times
                           (matching the most amount possible))
--------------------------------------------------------------------------------
  (                        group and capture to \3:
--------------------------------------------------------------------------------
    [ \wà-                    any character of: ' ', word characters
    ú'"\.,\ \*\(\)]          (a-z, A-Z, 0-9, _), 'à' to 'ú', ''',
                             '"', '\.', ',', '\ ', '\*', '\(', '\)'
                             (1 or more times (matching the most
                             amount possible))
--------------------------------------------------------------------------------
  )                        end of \3