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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
! o5 ]/ c. e# B3 @3 F/ I D% k$ K其中有一段如下1 m5 I$ L; X* O! V$ ?
ask turtles with [ infected? = true ] 4 {/ S, @- x S5 F1 n/ ^0 p9 ]; x
我原本以为这句会回传『所有』infected? = true 的 turtle
+ B T7 E7 E; x% ^4 O# k/ |) L但看结果似乎不是这样。3 ^% \/ n, g; Q- N
8 I( V& z, |# D# v3 w0 M: H" O* z假设所有符合条件的有 5 笔1 L8 o& [: F5 b2 J$ ]- y
有时候回传 1 笔,有时回传 3 笔,是不固定的5 k7 T) {; f) O& D" }6 v
回头查语法定义* N2 d P, X0 h8 f
with
/ A& B7 L/ n8 h) Y; U+ B" W, u6 k; nagentset with [reporter]
5 t7 M6 f% S( k5 N& @6 x3 ETakes 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.
( u5 F6 t/ D4 j它只说回传 agents satisfying the given condition
$ o2 [; T% ^9 M; D5 U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 ? 6 \. W% J) j8 P. e$ M
_' H! ^* ]9 K9 M; P( M( R1 W; C1 u: |6 Y想确定一下' E- E2 `9 P4 Y# k s, [8 }
谢谢!9 w& g% r# M3 A) ]5 i9 i7 w
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