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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
9 y X7 ^, \* Y y其中有一段如下6 v/ o# X, t5 X% |% n5 e
ask turtles with [ infected? = true ]
. Z+ }/ U8 a1 o; P2 x' U我原本以为这句会回传『所有』infected? = true 的 turtle# \- K7 J! V y( v6 [9 V/ n
但看结果似乎不是这样。, W; Z2 Q3 Y5 m+ U5 C& v$ D
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假设所有符合条件的有 5 笔
1 N5 Q4 D& a9 l& x P" Y3 E6 z有时候回传 1 笔,有时回传 3 笔,是不固定的 A/ U+ Y: s4 O3 o% c, C, D
回头查语法定义( m1 F: }$ o5 {: }
with
: ~8 R: z4 \3 L' p$ T; dagentset with [reporter]! ?8 _3 X; u% r
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.
1 [% h) A, o: C) h7 B% C它只说回传 agents satisfying the given condition. ~5 F' {- [; \, F$ @2 ^
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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7 t- B7 K2 z8 v- ~/ b, `' x想确定一下( X5 T* n E' N8 D- \3 _, ^
谢谢!9 |3 v! A0 T3 Y# H. B9 x) o D8 U7 ]3 P
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