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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) \+ a) k( r' @- Q3 V0 c3 e
其中有一段如下
5 m+ z9 y, M; T3 C5 }ask turtles with [ infected? = true ] ( d O/ `7 y+ }. V0 |; o) l% k
我原本以为这句会回传『所有』infected? = true 的 turtle
) w: S; Q8 J' D8 r但看结果似乎不是这样。
# q- `+ l' O+ b8 B/ G4 R3 H
% W* _# v7 H: v假设所有符合条件的有 5 笔, U+ i% G. s6 Q9 F
有时候回传 1 笔,有时回传 3 笔,是不固定的% I e5 b) N, s/ |: N
回头查语法定义
3 W" W+ P5 { @; I# Swith
/ W" X6 E( o2 s Jagentset with [reporter]
) z7 P) r% i! e, y2 K: n4 R6 _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.
4 M6 N; e9 C8 F& v! b' G& P它只说回传 agents satisfying the given condition
4 q$ u( O- M9 a. Y* Z- _! 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 ?
d0 K" [2 E* [9 G3 W" P% b5 h3 D7 i& D- a* Y' q( |9 F+ A
想确定一下' \( X- e& p/ X( K/ F+ \& j
谢谢!/ D8 Y8 P y/ {- Y
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