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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
8 }% t6 Y, M( W# j! z% Y其中有一段如下
$ ]6 Y. M* M, O& @; F6 oask turtles with [ infected? = true ]
. J4 k, c2 R, \; g6 }我原本以为这句会回传『所有』infected? = true 的 turtle
; _8 e/ t8 z6 m/ ^7 t% S但看结果似乎不是这样。1 q, k$ |" \: Y! w4 l
, r, A7 @! S6 j1 {+ g6 M假设所有符合条件的有 5 笔8 W0 _+ L$ J: g# t r" q
有时候回传 1 笔,有时回传 3 笔,是不固定的. I, h0 p( t" }6 t1 w
回头查语法定义& h) v0 a1 }8 H& F
with
7 B) y& N" J Z Z3 E7 P# `agentset with [reporter] T3 o, N7 n- j* N& G4 w2 W( _
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.
& I; }8 {( j" p, Z它只说回传 agents satisfying the given condition
( q& f$ P" t- _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 Z5 ?- j* R0 m/ Y& E) h6 U8 K. E1 c, P+ N$ b4 S A; Q, G
想确定一下$ E: k; h7 j7 A: e! ^" _) M
谢谢!
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