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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
. s' j; z4 {5 x其中有一段如下* P4 L$ ~( F6 n4 L9 }1 ^5 { Z
ask turtles with [ infected? = true ] - }2 K2 b$ Z2 V4 l
我原本以为这句会回传『所有』infected? = true 的 turtle
( N) M1 T. x$ L但看结果似乎不是这样。0 A6 z0 w; b$ \
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假设所有符合条件的有 5 笔% W6 P) z6 z# m4 H% z- M+ Z4 X
有时候回传 1 笔，有时回传 3 笔，是不固定的
1 j F( @, H3 Q8 B4 c9 }- E6 _5 V回头查语法定义
! r5 D5 F+ o- l9 `. N0 qwith ( Y+ u: g8 t" ^, d
agentset with [reporter]8 j: G& K9 x' T. K9 S( T
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 I) @, H3 ]( ^# ?0 G它只说回传 agents satisfying the given condition8 Y9 K$ M2 N- k8 k3 b' p
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 ? 0 |3 p0 A8 Z5 P P8 K! { q0 k6 q
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想确定一下; s- H% _# _2 s$ T" d$ a/ F7 O, c k
谢谢！6 n7 X4 m- z. J' \* _! z
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楼主
发表于 2013-11-7 00:02:20
