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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
. D$ F! e4 d8 r0 p3 k其中有一段如下5 M% n+ D8 K! W! K7 B
ask turtles with [ infected? = true ]
! b+ q" i u& q- @/ ?, R' c我原本以为这句会回传『所有』infected? = true 的 turtle5 s# y% g* J1 x: V3 m0 H- Y3 N5 F
但看结果似乎不是这样。$ W7 ?# V6 R5 e* ]# r8 s
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假设所有符合条件的有 5 笔
+ h6 p' w8 {( H, p \7 S& |8 Y有时候回传 1 笔，有时回传 3 笔，是不固定的$ t$ @9 d, T$ _# W. u/ P3 o" z
回头查语法定义
8 M: q2 R* B) @. z5 _8 zwith
- ]) X! w: j7 A8 Eagentset with [reporter]2 W% q* f* v g7 L% b8 k
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.
0 {! H0 m2 m2 e1 b- S% L7 u, B它只说回传 agents satisfying the given condition
% N c) x! F6 o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 ?
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# r& ^2 s& t7 C) E0 f8 e) _想确定一下' C6 c9 L5 q9 {9 ^
谢谢！
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楼主
发表于 2013-11-7 00:02:20
