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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/ y6 J: n) ~, O* \; m5 o( r X
其中有一段如下
u+ v# }% V0 j9 n' _: G" |! s, O6 qask turtles with [ infected? = true ] 4 \) k4 j3 \$ |/ F$ ?4 |; A* Y
我原本以为这句会回传『所有』infected? = true 的 turtle
! f3 {6 S/ Z( e' k8 D8 u但看结果似乎不是这样。6 n" l# v( y) F9 h2 T+ o
! o% N) P9 u) {) {9 N假设所有符合条件的有 5 笔
# S3 \: U8 p6 s; y有时候回传 1 笔,有时回传 3 笔,是不固定的& }; `1 o# B9 j' G7 ]
回头查语法定义4 I: D! B* n0 [8 G4 Y. |
with
0 c7 d" s$ _8 F5 u, _agentset with [reporter]9 a+ I1 W' x; k6 d& I' }
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.$ Y% a* v0 \& @, Q" @% M2 n
它只说回传 agents satisfying the given condition0 i; J5 @# L# X5 i
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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想确定一下# z7 I6 i9 h$ r0 A( m/ a [ i
谢谢!
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