pick element from space separated list that is part of params hash

To pick an element from a space-separated list that is part of the params hash in Ruby, you can follow these steps:

1. First, access the params hash to retrieve the space-separated list. For example, if the list is stored in a parameter called "list", you can access it using params[:list].

2. Once you have accessed the space-separated list from the params hash, you can use the split method to convert the string into an array of elements. For example, if the list is stored in a variable called list_array, you can use list_array = params[:list].split(' ') to split the string into an array using the space as the delimiter.

3. After splitting the string into an array, you can then access the desired element based on its index. For example, if you want to retrieve the third element from the list, you can use list_array[2] since array indices are zero-based in Ruby.

By following these steps, you can pick an element from a space-separated list that is part of the params hash in Ruby.