regex - Javascript method for changing snake_case to PascalCase

Question

I'm looking for a JS method that will turn snake_case into PascalCase while keeping slashes intact.

// examples:
post -> Post
admin_post -> AdminPost
admin_post/new -> AdminPost/New
admin_post/delete_post -> AdminPost/DeletePost

etc.

I have something that will turn snake_case into camelCase and preserve slashes, but I'm having trouble converting this for PascalCase

Here's what I've got so far:

_snakeToPascal(string){
    return string.replace(/(_w)/g, (m) => {
      return m[1].toUpperCase();
    });
  }

Any advice is appreciated!

EDIT - Solution found

Here is what I ended up using. If you use this be mindful that I'm using this._upperFirst since I'm using it in a class. It's kinda greasy but it works.

  _snakeToPascal(string){
    return string.split('_').map((str) => {
      return this._upperFirst(
        str.split('/')
        .map(this._upperFirst)
        .join('/'));
    }).join('');
  }

  _upperFirst(string) {
    return string.slice(0, 1).toUpperCase() + string.slice(1, string.length);
  }

Answer 1

Here's a solution that preserves slashes and converts snake_case to PascalCase like you want.

const snakeToPascal = (string) => {
  return string.split("/")
    .map(snake => snake.split("_")
      .map(substr => substr.charAt(0)
        .toUpperCase() +
        substr.slice(1))
      .join(""))
    .join("/");
};

It first splits the input at the '/' characters to make an array of snake_case strings that need to be transformed. It then splits those strings at the '_' characters to make an array of substrings. Each substring in this array is then capitalized, and then rejoined into a single PascalCase string. The PascalCase strings are then rejoined by the '/' characters that separated them.