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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
1 P) P$ J, W+ ~% v其中有一段如下1 `& @" p1 l0 D! i# D6 r! A
ask turtles with [ infected? = true ] . @; m& g0 I o" J. H! v
我原本以为这句会回传『所有』infected? = true 的 turtle
& {0 E" c* x2 f0 n$ ]6 O但看结果似乎不是这样。9 D% r$ h, m' Y, T* I1 [0 t
; x r2 d# e( C# d+ S假设所有符合条件的有 5 笔( A. J6 T( R U7 C" C
有时候回传 1 笔,有时回传 3 笔,是不固定的4 ~ u) m& o" J8 r
回头查语法定义
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agentset with [reporter]9 C$ [4 U& H7 f, U' \
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.
4 l' Y$ C( S/ i4 s- Z& T3 Z它只说回传 agents satisfying the given condition
8 q+ W8 K6 y. a" j9 \# ]& A" [ g L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 ?
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1 f8 r) h; N: E7 R8 d( k$ d想确定一下
$ _/ q3 n: Z: G; [ r谢谢!
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