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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 `5 u' N4 w0 M- P: H! u
其中有一段如下, [9 W0 {* B$ X6 Q
ask turtles with [ infected? = true ]
4 q4 q' S" m) D我原本以为这句会回传『所有』infected? = true 的 turtle
+ ^) g" R; U# x, |+ h( t; ?: P* V. P4 J但看结果似乎不是这样。9 v* N1 C3 V/ _# {$ |8 \
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假设所有符合条件的有 5 笔7 p+ P+ b- _0 |2 S7 h
有时候回传 1 笔，有时回传 3 笔，是不固定的3 U# a* v3 c4 {7 u; A% X1 q
回头查语法定义
0 ]+ g8 D4 F0 ]5 M4 Qwith
% `9 t; m/ F7 b4 J4 D' v# [. Iagentset with [reporter]+ d' w$ }1 d: C3 W; l! ], U; o
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.
9 d$ @! q1 U X, c, f, y2 R! k它只说回传 agents satisfying the given condition
8 s1 D) ]" D+ N5 w. O9 P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 ? ) ~, H9 Q+ _* K4 B
3 U$ u* R( x5 S$ S; c# j
想确定一下. l* H* ~1 D! ~
谢谢！
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楼主
发表于 2013-11-7 00:02:20
