Question

如何提取广义表中的元素,如A = ( ( ( a,b,( ),c ) ,d ) ,e ,( ( f ) ,g ) )要提

Answer 1

于删除广义表中所有值为*的元素,例如删除广义表（（a,b）,a,(d,a)）中所有a个结果是广义表（（b）,（d））.-Delete generalized table for all value of* the element,for example,delete the generalized form ((a,b),a,(d,a)) for all a result is a generalized form ((b),(d)).