Google apps script regex match

Question

I get true for the below

function myFunction1() {
  var text = "hello world";
  var regex = /hello/;
  var result = regex.test(text);
  console.log((result));
}

Why am I getting false for this?

function myFunction() {
  var array = ["2023", "2022", "2020"];
  var regex = new RegExp("^20\d{2}$");

  for (var i = 0; i < array.length; i++) {
    var result = regex.test(array[i]);
    console.log(typeof(array[i]),result);
  }
}

The output is false for all the items in the array

I also tried changing the regex pattern as 20\d{2} but still getting false

Should the result not be true?

Answer 1

In your script, how about the following modification?

From:

var regex = new RegExp("^20\d{2}$");

• In this case, it is /^20d{2}$/. I think that this is the reason of your issue.

To:

var regex = new RegExp("^20\\d{2}$");

• If you want to use ^20\d{2}$, please modify as follows.

  • From

      var result = regex.test(array[i]);
    

  • To

      var result = /^20\d{2}$/.test(array[i]);
    

Testing:

var array = ["2023", "2022", "2020"];
var regex = new RegExp("^20\\d{2}$");

for (var i = 0; i < array.length; i++) {
  var result = regex.test(array[i]);
  console.log(typeof(array[i]),result);
}

or,

var array = ["2023", "2022", "2020"];

for (var i = 0; i < array.length; i++) {
  var result = /^20\d{2}$/.test(array[i]);
  console.log(typeof(array[i]),result);
}

Reference:

• RegExp