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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9 O3 u1 {" I! R1 c
其中有一段如下. g3 V6 C5 l" Z/ Y7 a! w" \
ask turtles with [ infected? = true ]
: n6 k9 z; h8 D6 y& T我原本以为这句会回传『所有』infected? = true 的 turtle
9 F9 i" V& q$ p, S& Y. l但看结果似乎不是这样。
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1 n$ E/ y5 m* u9 o0 I1 `/ w! H假设所有符合条件的有 5 笔& X% L: c! ]' }7 J# W) o+ K
有时候回传 1 笔，有时回传 3 笔，是不固定的, e$ f4 z% P; L' l
回头查语法定义: A: K: I R* ]
with 1 s! z9 p0 e2 u. J8 L
agentset with [reporter]
6 [% t7 {# R! X: } i: P+ PTakes 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.
: E5 `( r! x7 }; g: A它只说回传 agents satisfying the given condition
7 {' `# B4 H3 b" G. ]) I5 s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 ? 8 y) N$ |" R, V5 ^
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想确定一下8 a/ X( K7 U2 b1 d, w
谢谢！
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楼主
发表于 2013-11-7 00:02:20
