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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
% e w0 W; ]8 t" L; h6 C其中有一段如下
% P; F' Q7 h6 U; ~ask turtles with [ infected? = true ] . I4 r3 S- O' Z
我原本以为这句会回传『所有』infected? = true 的 turtle: [7 X$ T, ]0 w
但看结果似乎不是这样。! P/ i9 ^3 _) g% v0 J% w' ]2 k" t
6 d* a# J ]0 u# t假设所有符合条件的有 5 笔
5 p2 V& g" x) G" |3 \有时候回传 1 笔,有时回传 3 笔,是不固定的
5 N( ]$ r5 s* K8 w: @$ s回头查语法定义2 ?" ]9 z6 _8 b1 F
with , g1 @7 n% ~$ a& {7 W$ E4 M
agentset with [reporter]. P# t/ x, g9 A
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.. [' ~$ {3 P6 s1 ]
它只说回传 agents satisfying the given condition
) g3 {6 n0 f ~/ e0 }- 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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: _5 x G. o5 i( y' w y2 b想确定一下
0 e3 S9 T2 d: ^* ~谢谢!
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