| 去尾 | }: _ |
|
}:y 去掉 y 的末端子項，同於 _1 }. y
。故：
|
]y=: a. {~ (a. i. 'A') + i. 4 5
ABCDE
FGHIJ
KLMNO
PQRST
f=: }: ; {:
f y
+-----+-----+
|ABCDE|PQRST|
|FGHIJ| |
|KLMNO| |
+-----+-----+
g=: }: ,.@; {:
g y
+-----+
|ABCDE|
|FGHIJ|
|KLMNO|
+-----+
|PQRST|
+-----+
h=: {. ,.@; }.
h y
+-----+
|ABCDE|
+-----+
|FGHIJ|
|KLMNO|
|PQRST|
+-----+
}:"1 y
ABCD
FGHI
KLMN
PQRS