%= cen·tis

%=  wing1   wing  hoon   wing  hoon        ...   wing  hoon ==Resolve a wing with changes. Here, we will look especially at cases where wing1 resolves to an arm. However, %= can also be used to resolve a leg of the subject with changes.
wing1(wing hoon, wing hoon, … wing hoon)

%=  is used to resolve a wing of the subject (an arm or a leg) with changes.

  • The first child is the wing to be resolved.  
  • The remaining children must be in pairs of a wing + some hoon to evaluate.

In the case of resolving a leg with changes, we produce a new a copy of the leg, with the specified changes.

Documentation on urbit.org