Find string can be array

Question

I got a result like this :

const result = [ 'arg', 'arg2', '[opt1, opt2]' ]

How can I check in this array if a string can be a array ('[opt1, opt2]') and formate it in real array ?

Thank you

EDIT :

I explain all problem :

I want create a script :

yarn start arg1 arg2 "[option1, option2]"

I need a array of options but I can have a lot args without restrictions, when I recover the result :

const res = process.argv.slice(2)

How can I find my array of options ?

why do you have an array into a string? if you take the array out of the string you can do a type check. [ 'arg', 'arg2', ['opt1', 'opt2'] ] — G.Vitelli
– G.Vitelli, Commented Oct 22, 2020 at 8:49
even if you evaluate the string to an array you will get an reference error because opt1 isnt defined. Or is this also an string? — Ilijanovic
– Ilijanovic, Commented Oct 22, 2020 at 8:50
If the string-array is not json or other known format, you may need to build your own parser. — Eriks Klotins
– Eriks Klotins, Commented Oct 22, 2020 at 8:51

DevCl9 · Accepted Answer · 2020-10-22 09:32:10Z

1

You can try the following solution with string manipulation

const result = ['arg', 'arg2', "[option1, option2]"]

const output = result.map(item => {
  if (/^\[.+\]$/.test(item)) {
    const prepared = item
      .replace('[', '["')
      .replace(']', '"]')
      .replace(/([a-zA-Z0-9]+),+\s+/g, '$1", "')
    return JSON.parse(prepared)
  }
  return item
})

console.log(output)

Explanation:

/^\[.+\]$/ regex - checks whether the element is an array (based on the presence of matching square brackets)
all other replace statements change the string into valid string encoded JSON array.

Since the overall result is a valid string encoded JSON array, just use JSON.parse after that and return it.

answered Oct 22, 2020 at 9:32

DevCl9

3081 silver badge9 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Find string can be array

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related