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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% f- P9 _% f2 G
其中有一段如下9 s. Q2 Q, ~$ o/ D
ask turtles with [ infected? = true ]
0 Y* u3 h/ u3 y" q; W0 ~我原本以为这句会回传『所有』infected? = true 的 turtle! g8 [3 ~5 z- R0 }! A, d
但看结果似乎不是这样。5 r$ x1 h4 r: o! A0 k
: N% b- R' s# m8 D! ~( M: s假设所有符合条件的有 5 笔
5 J; y( i J6 R% A* P4 |有时候回传 1 笔，有时回传 3 笔，是不固定的4 A: C# h. C! T: }) q
回头查语法定义
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agentset with [reporter]. M1 O$ q7 m3 ]% J" G; z' Q' p# ~4 M% d
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.2 R9 \; L# @. h9 @
它只说回传 agents satisfying the given condition! A1 B8 X& g1 h# x( s2 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 ? 4 C6 J$ g2 Y3 V- E! x
9 W2 N1 P- j* D+ z p想确定一下
& v& `* ]$ S5 g谢谢！+ R3 ~1 |' K6 l7 Q. y4 c' @/ E
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楼主
发表于 2013-11-7 00:02:20
