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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
% |. }: @* [ r" p( D其中有一段如下
v# l$ W0 d9 Z) mask turtles with [ infected? = true ] 9 F/ j2 y) o* x& @: h* Z
我原本以为这句会回传『所有』infected? = true 的 turtle
) v- {, |* H: ^) a但看结果似乎不是这样。* X% c8 l6 [% a
- f; u! o& V3 B0 B9 W2 Y% P" I假设所有符合条件的有 5 笔* `: i0 v! B) F0 Z/ s- d
有时候回传 1 笔,有时回传 3 笔,是不固定的6 z+ P5 V' C7 W: I# z+ U
回头查语法定义7 C8 L7 U& r/ G! ^! L5 X5 l4 n9 e
with
9 ]6 N q6 ~. A" R/ S4 M# Zagentset with [reporter]
2 f8 O# j' d; L. ?1 b1 mTakes 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.
! I) Z# m! A) @ O它只说回传 agents satisfying the given condition! r+ A s) ^3 k9 g6 B% V) ~
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 L; e9 Z" b! U; }% @
+ E* v y4 v4 k0 k/ C想确定一下* N& t! M* _$ ]: K5 ^
谢谢!7 g$ }7 b! Z9 H! ~+ Q
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