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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
! p' D$ s/ I6 ]* q9 `/ D- W& T8 J其中有一段如下
8 R! i9 V' K" _' g; Uask turtles with [ infected? = true ]
( ]8 }+ r+ \" j4 r' h我原本以为这句会回传『所有』infected? = true 的 turtle
; D! n+ v: r5 M* F但看结果似乎不是这样。, p. J7 [* U# W
$ A! W# L, G( ?8 v. W7 w假设所有符合条件的有 5 笔
% n& r, b4 l( D/ ]7 C. @6 ?有时候回传 1 笔，有时回传 3 笔，是不固定的
0 ^9 z6 W7 y4 C, O* L! A回头查语法定义
1 S- B6 u L5 }1 z+ owith
5 B2 y: e7 w8 `& V. {0 x: ~agentset with [reporter]
" A) Q0 |5 O# kTakes 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.
% m/ I8 z) a' U) x2 i1 _) k; Q它只说回传 agents satisfying the given condition
2 |( _6 d" U& c; c) f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 ? 3 a0 ]2 J! A9 o/ L% _7 ^- y- {- ^" x
0 i6 Z3 w8 [! k8 v( N
想确定一下
1 ]9 I: g2 L" P3 u谢谢！, c4 V7 M, T, s* M' ~
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楼主
发表于 2013-11-7 00:02:20
