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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+ h' c6 w5 }; d6 F, x! \9 {
其中有一段如下3 W3 m+ W& I0 h( L
ask turtles with [ infected? = true ]
. ?1 [+ P% D. C/ n, t4 _& v我原本以为这句会回传『所有』infected? = true 的 turtle
3 R# i8 J4 g) X9 d( v1 d但看结果似乎不是这样。
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" L) V/ p# W, {6 H假设所有符合条件的有 5 笔
( ?& |3 M$ M! i有时候回传 1 笔，有时回传 3 笔，是不固定的6 _, n9 K% g8 D' Y# n0 j* i
回头查语法定义
( A1 c, e6 J4 q5 l- N9 E- ewith
8 w7 f3 W: e: c7 J3 r2 C2 D( u% Jagentset with [reporter]
1 z# c0 B" u9 |- hTakes 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.
! s: T2 {$ ]+ M+ l它只说回传 agents satisfying the given condition
- z/ [# g" H T3 [+ R- r; U8 @' N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 ?
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想确定一下) c' }( p. c) P: R4 k7 h3 P9 A" ~
谢谢！
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楼主
发表于 2013-11-7 00:02:20
