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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# P& f1 t. g3 G( \3 E
其中有一段如下$ w# y* P1 U* P0 j. q5 V4 J) M
ask turtles with [ infected? = true ] 0 V6 }7 a& g9 _5 l; b; d; |+ Y. G1 f
我原本以为这句会回传『所有』infected? = true 的 turtle5 N, D2 C/ d! E# J& v+ x6 i+ e8 m& c- v
但看结果似乎不是这样。- x7 V9 d' J! w0 O9 H
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假设所有符合条件的有 5 笔4 k6 z9 H, |" ]* e% u
有时候回传 1 笔，有时回传 3 笔，是不固定的+ i. ?, H! d) M, I, `5 {' c% }+ H' f
回头查语法定义
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agentset with [reporter]
) Z. N9 g5 n% o/ qTakes 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.# x2 a9 p# D: N+ L
它只说回传 agents satisfying the given condition
7 M% z# O8 K1 K7 n( t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 ? ( X3 B9 ^; d" `5 ` u* E! s
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想确定一下
( g8 w G( N0 _4 }谢谢！' p1 \7 n3 l* j' H' h! h- S" p
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楼主
发表于 2013-11-7 00:02:20
