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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
1 _# I* N- H) @9 d$ S8 r) S# s其中有一段如下0 a1 s8 D3 z$ q" w" ]0 G
ask turtles with [ infected? = true ]
1 A: X+ W$ }6 X- p1 [我原本以为这句会回传『所有』infected? = true 的 turtle5 d7 c" v. s8 z7 l" `, t
但看结果似乎不是这样。, O1 v7 ^" y- U E
$ f' G6 y+ i$ X8 r假设所有符合条件的有 5 笔
3 W0 [! h% ~0 J$ Q m5 J, {/ w1 k$ W有时候回传 1 笔,有时回传 3 笔,是不固定的; j2 k. H' _ E L2 _4 ]' C
回头查语法定义
$ h0 u; t2 j0 T5 @" ]7 xwith
1 x) p( E/ @8 _& H \agentset with [reporter]
& U# m/ |# R& ~3 Y$ [# i, u" Y9 TTakes 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.
+ \. Z" I/ S. J# F它只说回传 agents satisfying the given condition
9 `" k2 A2 i2 X' Z$ \+ P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
' T: X* ]$ R' ?0 j5 Y8 f谢谢!2 X0 s: m8 f0 S+ K: |+ s
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