|
|
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+ [6 q$ D8 Z7 D/ @7 g' c
其中有一段如下5 F u8 g7 [: p T! k9 {
ask turtles with [ infected? = true ] 2 W) u, m0 A! D# u2 S- e U
我原本以为这句会回传『所有』infected? = true 的 turtle
( j+ I0 f9 U3 Z3 n0 W/ v但看结果似乎不是这样。' r( ?- Z! S# m+ p
& x( v) M: T- }, x) p1 Z假设所有符合条件的有 5 笔
) J# j+ p, D# T2 H有时候回传 1 笔,有时回传 3 笔,是不固定的9 K6 u. F; V7 M% k+ R
回头查语法定义
) r: n |% M* U. ~) s3 ~! ^/ pwith
3 P: v) i/ e% _! m: Z, jagentset with [reporter]# i) r0 M8 g3 O7 M0 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.
- ~" E% X6 P: X) ?它只说回传 agents satisfying the given condition
( P% I% s6 o, h- ` D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 ? ) ^. I1 [4 V, V4 ~! R- t
/ `1 W; V! h% J1 {
想确定一下
" |" [' Q5 a9 F8 o1 L) \7 j' V谢谢!
9 C% o& l$ F( L0 l% v3 |, h |
|