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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
! d7 T/ ?" C# _! ?) B/ p其中有一段如下* @4 t+ z. K" l; f9 ]4 X
ask turtles with [ infected? = true ]
5 i5 h) [# w ?我原本以为这句会回传『所有』infected? = true 的 turtle9 n4 E% ~- H2 W7 i
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# }$ N" F4 C9 |" L& S/ F# J! b
有时候回传 1 笔,有时回传 3 笔,是不固定的$ A1 R! s: j: w; A
回头查语法定义/ P' n( a% P7 F+ t
with
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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.
( j6 {/ n/ X+ H1 I它只说回传 agents satisfying the given condition
2 T i; d# z- s* w; T' y+ l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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' n5 F" n! l6 X想确定一下
9 b0 k n6 S! `- Y. Q谢谢!, s8 e+ e/ j. t. O) ]; I1 k
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