|
|
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/ K/ H7 {& R7 o$ }$ M3 x/ q, v/ V
其中有一段如下
; \, S6 z" a/ h' T8 ?ask turtles with [ infected? = true ]
% a$ r# J+ h" _2 B$ S, i, v3 h. T我原本以为这句会回传『所有』infected? = true 的 turtle# T$ R- {% m3 e) U9 N
但看结果似乎不是这样。% m9 c( s1 Y) _6 j+ ^/ L9 q. ^
# Z1 m4 g! P6 [+ |假设所有符合条件的有 5 笔& e, s. S8 o4 _# R# W3 T- W- Y( k$ p
有时候回传 1 笔,有时回传 3 笔,是不固定的. H1 |, [3 a1 |& L8 q
回头查语法定义
4 y1 ~0 { e! f( K `with # W; e# y) L, R& s
agentset with [reporter]
; P0 I3 V( E. z# V& d& ~- V% H* {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 ^' A/ f! B, p9 C4 E* W1 y) z4 a
它只说回传 agents satisfying the given condition: U l6 O' m; 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 ?
4 O) b3 ^( a( i) @" [" h; {$ E3 T! S! z! y; F7 ?+ p/ }8 e/ |
想确定一下
' }/ q- D; D* l1 L4 f谢谢!+ \4 [, ^7 w% I' Y
|
|