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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, i- |( [; I9 K
其中有一段如下) j+ b! A' @4 T s1 a0 @
ask turtles with [ infected? = true ] ' n/ n8 u' K8 y4 g* _
我原本以为这句会回传『所有』infected? = true 的 turtle' ` Y7 }4 A1 _+ g+ y" W; }" Y
但看结果似乎不是这样。" v! v9 z. E5 v5 [* w+ ~4 y
- w) `! Z( q( U假设所有符合条件的有 5 笔
) Y" U8 O- X5 }' X1 b) K有时候回传 1 笔，有时回传 3 笔，是不固定的6 f0 r8 @: N7 e/ E/ ?. d
回头查语法定义+ w, @8 L" a7 i6 N3 r; B2 A
with
8 p' m* m4 i3 L+ R% @- F+ zagentset with [reporter]
+ e" X: I3 N6 U0 V" {; u% {' O/ p0 ETakes 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.
- d# h! Y1 |4 v! q" g$ F3 U& e3 C( S它只说回传 agents satisfying the given condition
2 ?! |' |& H* q2 a, S& v) i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 ? " E+ \/ s! X& |* `
' m4 y% O' D3 Y7 q& L* V想确定一下0 h- T( P3 ^8 ]5 \2 g- s- e0 O) Q
谢谢！
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楼主
发表于 2013-11-7 00:02:20
