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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! }/ o7 Z( ~/ b
其中有一段如下6 ?# C; K0 a: A6 Q7 K
ask turtles with [ infected? = true ]
( i: m' U4 F. Y. G+ ?9 s" {) u我原本以为这句会回传『所有』infected? = true 的 turtle' P0 J0 ?, l, }
但看结果似乎不是这样。
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& Q5 W5 o6 T4 K% ?/ h, [7 P假设所有符合条件的有 5 笔, j; j6 k. k7 ^
有时候回传 1 笔,有时回传 3 笔,是不固定的- Q5 I: `! a! s& B2 Z
回头查语法定义7 a& J+ X; Y, k+ y/ `; H8 a8 L2 m. s
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agentset with [reporter]
, m, {1 p9 p* X7 h8 R8 uTakes 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.
! U: P' }' y! `* h3 J' v它只说回传 agents satisfying the given condition& Y! ?( C% v, w$ Q
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 ? % A5 g1 X* F' O" o8 H! m7 {
$ o, o' |( R2 w& k. Y. n& N3 v想确定一下: ~' j) P/ {+ G8 h; _- F# f
谢谢!
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