|
|
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5 Q/ l6 @0 z$ Z% g( K3 l( [; w
其中有一段如下; ?2 ?( }2 r) S8 r t6 \! ~
ask turtles with [ infected? = true ] 9 C% s6 m/ j' `& [7 n/ b( h+ [
我原本以为这句会回传『所有』infected? = true 的 turtle
! {: P+ ]5 K5 P. B但看结果似乎不是这样。7 M8 P! m& |' L3 X
4 n' v6 f; ]" Z" {& R b4 N假设所有符合条件的有 5 笔
! |0 j, X, e1 e5 ]' e6 V6 c, C' P2 |有时候回传 1 笔,有时回传 3 笔,是不固定的
8 ^ Y" X! Z# t0 y$ _回头查语法定义+ U9 g' O# s, f/ p6 c: G% z2 C! S) U7 P
with 5 a5 R0 P" f) U5 f/ d: |' E
agentset with [reporter]
( z6 `) k$ k3 dTakes 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.
# v9 I9 |: Q+ n' l& e, @它只说回传 agents satisfying the given condition. p+ ~( E& M( \" a5 I& }; F
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 ?
# a/ p4 M4 V2 G4 D+ V+ w' L+ j1 p0 [* E/ |! f. l' \( ~6 e
想确定一下
. M! y( C, U( J, h: q* W; |; T g谢谢!6 W, f; B( J, l
|
|