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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
" Z% c& Q2 o1 x8 |. |! K* Q其中有一段如下
2 P7 S: s* S5 w0 q2 d _/ N+ l7 Cask turtles with [ infected? = true ]
6 q( j# Y0 P* X% m# r. B U$ Y我原本以为这句会回传『所有』infected? = true 的 turtle5 K: G* C' f& {# c' k) K0 n. r
但看结果似乎不是这样。
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0 {$ \5 p" p7 e假设所有符合条件的有 5 笔0 y& F$ S$ n9 g" ]5 d) n
有时候回传 1 笔,有时回传 3 笔,是不固定的
4 ^* ]4 W) M \2 a回头查语法定义5 v: d7 o+ g. H0 {
with
) |# N9 _6 Z& s! B' W) qagentset with [reporter]5 h, W$ L0 d, T0 p
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.7 t: V8 m9 O+ P0 _" p; }
它只说回传 agents satisfying the given condition- D' f {2 C6 N) m |+ `
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 ? 7 G) r0 E4 E" R I' Y5 j# ?" W" ~. C5 V9 W
" V' m1 L" Y( `想确定一下
" v. i7 i! t+ |4 e谢谢!$ E8 v/ P" m8 {* ?/ w& Y/ d
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