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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
! ^7 a, j* T7 A: C# y其中有一段如下8 S! o. u: r$ T7 o3 N5 z
ask turtles with [ infected? = true ]
! ^, v5 O" p0 \* n8 `我原本以为这句会回传『所有』infected? = true 的 turtle0 _* z9 E4 G3 o/ d& f6 l/ n
但看结果似乎不是这样。3 E0 r5 I* ]4 t$ y
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假设所有符合条件的有 5 笔
8 ]7 |) C* W8 p( ^8 Z7 \; {# M有时候回传 1 笔,有时回传 3 笔,是不固定的
$ H, _8 G) }+ @' O2 r回头查语法定义
8 y) i2 K0 O$ `. O. {: kwith
7 s( Q* D" o9 J4 b L1 L/ |agentset with [reporter]
6 {: C9 d6 M6 y$ |! nTakes 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.
% Q6 m" P6 h2 {( T它只说回传 agents satisfying the given condition
' f" M" N/ x. Z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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. ^% ~# ~2 _( L8 f+ F* w1 B& d6 j" s想确定一下, X8 z! h$ f. l3 [
谢谢!0 c, Q7 X# y9 r
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