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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
( I! q2 e9 M8 z1 q其中有一段如下
. @- R: g( Z$ W1 F, o2 d; }ask turtles with [ infected? = true ] * n$ i' x0 X" a) Z( l
我原本以为这句会回传『所有』infected? = true 的 turtle8 _+ M7 ?. m, Z: s& ?. S G
但看结果似乎不是这样。4 f* L' T: v5 Z- ?* f, G% D
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假设所有符合条件的有 5 笔- Z/ u: F) n; T: @$ s$ e7 F) a! p5 e
有时候回传 1 笔，有时回传 3 笔，是不固定的
. `3 h' \* i* L' e. l5 w) b回头查语法定义$ l: T3 i( V. ^$ y z4 {+ k
with 9 J% S6 o, h- e
agentset with [reporter]
$ O5 D$ U5 p% J& M: M W( C" ^! RTakes 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.
5 @- t" O: y5 N它只说回传 agents satisfying the given condition2 e7 Q- I1 e, q" S- m7 q9 y1 J
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 ? ; A" h5 c9 ^& |1 X) k5 _' ~1 i
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想确定一下0 d# g6 M7 y. I: y. r1 z, {% L! e
谢谢！
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楼主
发表于 2013-11-7 00:02:20
