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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 s5 u4 k, G其中有一段如下$ g1 c+ \ l* H+ x0 I- w
ask turtles with [ infected? = true ] / p) Y9 U0 b9 a+ l1 b
我原本以为这句会回传『所有』infected? = true 的 turtle2 `7 v! Z3 f% z) ^( |
但看结果似乎不是这样。
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9 Q. k: `5 h; @5 y! J9 E假设所有符合条件的有 5 笔" L9 T' z0 a7 C B/ x; y9 `; z
有时候回传 1 笔,有时回传 3 笔,是不固定的
( C. A, M: {) v8 t4 x回头查语法定义, N, U" y }% S
with
) v. d# d2 w. o) F7 b' c+ `agentset with [reporter]5 x- Y1 F3 q: y0 s1 z6 |
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.' h& i# M; ? \5 I, T7 J" o+ J2 k
它只说回传 agents satisfying the given condition) a" h! \# I4 g5 U1 O
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 ? / I6 ?! G4 m" D t
. m' P3 [) E) Q! @想确定一下6 m) z8 F7 F; |6 ~
谢谢!
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