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新手发问超简单问题，目前还处于研读范例码的阶段，边测边看结果来理解程序7 O* x5 M A* ?3 G2 h
其中有一段如下
! T0 o, s& Z& Q3 {ask turtles with [ infected? = true ]
" Y: U; d1 U2 |) X$ p. {我原本以为这句会回传『所有』infected? = true 的 turtle
/ B! ]$ r2 Y! v( X但看结果似乎不是这样。( A0 P1 x+ b9 N& E
: h9 v8 l" B C3 l假设所有符合条件的有 5 笔
% W; e0 ~' E5 l( s9 G4 V; E1 w有时候回传 1 笔，有时回传 3 笔，是不固定的
" a: d8 x/ y* U- i3 M& M& E回头查语法定义
6 R8 _' y6 Q( t& e. Gwith
# P% F( ^6 _7 ]2 h+ o# m6 Jagentset with [reporter]
6 n. w4 h) x/ ~8 m# M7 ?Takes two inputs: on the left, an agentset (usually "turtles" or "patches"). On the right, a boolean reporter. Reports a new agentset containing only those agents that reported true -- in other words, the agents satisfying the given condition.
- p' {3 ^5 k! j' X. Z. ]8 O它只说回传 agents satisfying the given condition+ d+ }% D, X/ p* p8 G
是否 with 回传的是『符合条件』的数据，而不是『所有符合条件』的数据 ? 6 T6 M3 v+ o) t
6 L! l, ?! s- h# r; {' H想确定一下
/ o" }4 \9 B4 J' |+ p! a8 e谢谢！
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楼主
发表于 2013-11-7 00:02:20
