|
|
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4 X7 ?( W3 y; p2 ~" F- p
其中有一段如下; |1 W I8 t9 [% e
ask turtles with [ infected? = true ]
1 t; K! p: M8 a0 c" K) O我原本以为这句会回传『所有』infected? = true 的 turtle6 g3 S% E: Q. H# L8 U7 N7 O
但看结果似乎不是这样。
4 |1 y; Z6 B N) b
7 x4 P6 S% }; A7 c t假设所有符合条件的有 5 笔2 r- c+ b& e( c1 N( }) S
有时候回传 1 笔，有时回传 3 笔，是不固定的
* H0 m% f: B+ ^: j% h5 b2 D9 j" k* ?# k回头查语法定义7 s# n W2 B7 H2 { G
with 4 I9 H9 M, p3 G& ^! T( ?* u
agentset with [reporter]* D5 {, |/ D* r J% p% R3 F
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 H, x3 i7 z* b* D" ^它只说回传 agents satisfying the given condition
$ j0 d! |) w( V3 R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 ? 8 M6 K1 g8 r3 A' M1 E) P
7 Z$ C, a$ Z5 n4 [, f/ V
想确定一下
. a. `& E N- n. D: {5 w- a谢谢！' x# D9 s7 D6 x1 o
|
|
[复制链接]
楼主
发表于 2013-11-7 00:02:20
