希望:
letters: charset "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
pick letters 2
但是,如果我用char子把这封信带给第2号阵地,那就不了。
希望:
letters: charset "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
pick letters 2
但是,如果我用char子把这封信带给第2号阵地,那就不了。
炭 the是“set”,因此实际上没有“沉积”的概念。 你们可以测试会员资格、区别对待、否定等等。 但是,它们只是优化。
如果你关注“计算命令”,那么,是执行命令而不是规定令的你的统计员。
Note this code from http://www.mail-archive.com/rebol-list@rebol.com/msg16432.html
bitset: charset "aaaaybcx"
chars: copy {}
for i 0 (subtract length? bitset 1) 1 [
if find bitset i [append chars to-char i]
]
?? chars
如果你真的关心这一命令,就考虑维持一系列(例如扼杀!) 。 例如,在您的上述例子中,没有阻止你:
letter-string: "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
letter-set: charset letter-string
pick letter-string 2
之后,你们都获得了两个世界的最佳成就!
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