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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
& ^! ^; \0 ]' S" Q其中有一段如下; n% V7 b' R6 z8 V8 h/ i8 b
ask turtles with [ infected? = true ] / T, Q% N9 `( o( a' R
我原本以为这句会回传『所有』infected? = true 的 turtle' }, w& V0 T4 J% z3 f6 P/ \$ a; c
但看结果似乎不是这样。
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假设所有符合条件的有 5 笔
) d+ N- i4 B- ^: c+ E% x o+ T- p有时候回传 1 笔,有时回传 3 笔,是不固定的
* p9 X6 J& R. P0 B1 G7 X回头查语法定义4 E( B8 \ U# A
with
& a$ b; _1 W1 G# m% K V) f& e( ?! Wagentset with [reporter]7 Q& U a3 |7 H G/ L& o3 p8 L% z
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.: e+ H! P" d4 K8 g5 ~
它只说回传 agents satisfying the given condition n+ b" B+ n" x1 H
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 ? . {/ B* ^( F. X
! y& E: |* {( e想确定一下! J( w/ ?( J' U3 ?# _& C# U
谢谢!
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