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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 r- S( e2 |' H) \其中有一段如下( i- T2 f- M' d
ask turtles with [ infected? = true ]
2 c/ k4 l( _# J0 J% ?我原本以为这句会回传『所有』infected? = true 的 turtle
$ O7 O7 I) I1 B但看结果似乎不是这样。
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假设所有符合条件的有 5 笔
# ^' Q; {) ~% e! E7 j+ L有时候回传 1 笔,有时回传 3 笔,是不固定的
6 y: Y1 g3 e U& |回头查语法定义4 T; o* _6 }. t7 J2 S
with
1 z! Y* a. `" x! Ragentset with [reporter]% n& h8 p( `, @2 }* k' {* b+ ?
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.7 q" O. D; h5 k! _
它只说回传 agents satisfying the given condition
/ F, c$ V* b6 E( j" R# B1 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
& J3 m& ~# I3 T5 H, [/ l" \6 Q5 |谢谢!
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