}. Behead - Drop

>> << Ndx Usr Pri Phr Dic Rel Voc !: wd Help Dictionary

Behead | }. _ 1 _ | Drop

`}.` drops the leading item of its argument. |  | `x }. y` drops (at most)`|x` items from`y`,`` dropping from the front if`x` is positive and from the tail if negative. In general, if`y` is not an atom,`x` may be a list of length at most`r=:$$y`,`` and the effect of element`k` is`(k{x) }."(r-k) y`;`` if`y` is an atom, the result is`(0=x)$y` .

       ]y=: a. {~ (a. i. 'A') + i. 4 5
    ABCDE
    FGHIJ
    KLMNO
    PQRST

       f=: }. ; {.
       f y
    +-----+-----+
    |FGHIJ|ABCDE|
    |KLMNO|     |
    |PQRST|     |
    +-----+-----+

       g=: }. ,.@; {.
       g y
    +-----+
    |FGHIJ|
    |KLMNO|
    |PQRST|
    +-----+
    |ABCDE|
    +-----+

       (2}.y) ; (_2}.y) ; (6}.y) ; ($ 6}.y) ; (}."1 y) ; (3}."1 y)
    +-----+-----+-----+---+----+--+
    |KLMNO|ABCDE|     |0 5|BCDE|DE|
    |PQRST|FGHIJ|     |   |GHIJ|IJ|
    |     |     |     |   |LMNO|NO|
    |     |     |     |   |QRST|ST|
    +-----+-----+-----+---+----+--+

>> << Ndx Usr Pri Phr Dic Rel Voc !: wd Help Dictionary