### `++rap`

Assemble non-zero

Concatenates a list of atoms `b` using blocksize `a`, producing an atom.

Accepts
-------

`a` is a block size (see `++bloq`).

`b` is a `++list` of atoms.

Produces
--------

An atom.

Source
------

    ++  rap                                                 ::  assemble nonzero
      ~/  %rap
      |=  {a/bloq b/(list @)}
      ^-  @
      ?~  b  0
      (cat a i.b $(b t.b))

Examples
--------

    ~zod/try=> `@ub`(rap 2 (limo [1 2 3 4 ~]))
    0b100.0011.0010.0001
    ~zod/try=> `@ub`(rap 1 (limo [1 2 3 4 ~]))
    0b1.0011.1001
    ~zod/try=> (rap 0 (limo [0 0 0 ~]))
    0
    ~zod/try=> (rap 0 (limo [1 0 1 ~]))
    3



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