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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 }& J& u( ]6 ]3 c3 m! j' Y; n
其中有一段如下7 v. P5 S/ s" t8 d5 _# O! v
ask turtles with [ infected? = true ]
. h: j9 ~& G8 [* W1 Z我原本以为这句会回传『所有』infected? = true 的 turtle$ Q1 M+ q" [" ]+ E4 V
但看结果似乎不是这样。
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8 }, c+ B% m1 i* }假设所有符合条件的有 5 笔
' F- M7 b5 J q- n& a2 g有时候回传 1 笔,有时回传 3 笔,是不固定的& @# b4 G- T( q G1 a3 P
回头查语法定义: q3 {) m( e% ~7 @! a% N4 D# i1 O
with
; H6 z2 J5 I/ i- d% T3 \1 l8 V% @agentset with [reporter]* A3 A% f5 b! c4 X' `/ d |
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.
6 F- r5 I' b4 f. d6 B) I& }8 Y7 i它只说回传 agents satisfying the given condition
, W- N \0 \" t4 v( Z* W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 ?
5 y0 K# r5 @3 Q& ^. M! L2 s- w: H) `
想确定一下
9 i5 Y Z) l& }) }5 w谢谢!
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