UCG List Modules

    The UCG list modules can be imported like so let l = import "std/lists.ucg"; It has a number of useful operations.

    reverse

    The reverse module reverses a list. It has a single required parameter:

    • list the list to reverse.
    let l = import "std/lists.ucg";
    l.reverse{list=[1, 2, 3]}.result == [3, 2, 1];
    

    str_join

    The str_join module joins a list with the string representation of each element. It has two parameters:

    • list which is required. The list to reverse.
    • sep which is optional and defines the separater to use when joining the elements. Defaults to a single space
    let l = import "std/lists.ucg";
    l.str_join{
        sep=" ",
        list=[1, 2, 3]
    }.result == "1,2,3";
    

    len

    The len module returns the length of a list. It has a single required parameter.

    • list The list to reverse.
    let l = import "std/lists.ucg";
    l.len{list=[0, 1, 2, 3]}.result == 4;
    

    enumerate

    The enumerate module enumerates the elements of a list. It has three parameters.

    • list which is required and is the list to enumerate.
    • start which is optional and defines the start number of the enumeration. (defaults to 0)
    • step which is optional and defines the step amount for the enumeration. (defaults to 1)
    let l = import "std/lists.ucg";
    
    // with defaults
    l.enumerate{list=[1, 2, 3]}.result == [[0, 1], [1, 2], [3, 4]];
    
    // With all parameters
    l.enumerate{
        start=1,
        step=2,
        list=["foo", "bar", "foobar"],
    }.result == [[1, "foo"], [3, "bar"], [5, "foobar"]];