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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6 u v, U; R3 I9 z4 z
其中有一段如下) Q$ ]8 R0 {0 c
ask turtles with [ infected? = true ] 8 n, n4 a* @" U% A+ }; h1 m) H
我原本以为这句会回传『所有』infected? = true 的 turtle
$ w L2 D0 D; I6 ]1 X) b但看结果似乎不是这样。+ k" c. z: s8 o3 M
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假设所有符合条件的有 5 笔
+ {: |3 \3 ?9 ~9 B( b有时候回传 1 笔，有时回传 3 笔，是不固定的
7 ]6 y2 Y6 j+ O/ x回头查语法定义1 b, m" J* u* e+ u5 `' X: }( `
with & V; E: J, l. `, G3 q) N
agentset with [reporter]+ F9 f9 C: h; K5 b% D3 S
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.' \' y Q+ }5 u5 j6 ~
它只说回传 agents satisfying the given condition4 N4 K9 [$ ~) ]! P. A4 L( ^1 V. t
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 ? 4 }2 @0 n' E3 N- l& K1 C. c3 R
( ^( ^7 b3 d+ F9 A9 p想确定一下! }1 Z6 k* Y3 ?+ L1 _( Q
谢谢！
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楼主
发表于 2013-11-7 00:02:20
