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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
4 A& {: ]) n2 F+ G, [( W其中有一段如下
, @' F2 B& a2 A$ {ask turtles with [ infected? = true ] 9 g3 t& f% `+ \3 s
我原本以为这句会回传『所有』infected? = true 的 turtle
' O J4 o" |! _7 ?但看结果似乎不是这样。
4 F, P! b+ P& L' q2 Y
/ c1 v2 ~& B' a0 ]假设所有符合条件的有 5 笔8 n- O* G" J4 ^$ ]$ }$ ?/ a5 b
有时候回传 1 笔,有时回传 3 笔,是不固定的
2 F7 j& ?1 |. |1 N回头查语法定义& Y! z, Y M% W; C8 @" {; b
with
2 r' n& b$ `9 Z+ f. y) Pagentset with [reporter]0 v( s% g! p$ f8 u5 H2 Q" A
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.
# n, T( [+ ?, P* V }& a/ \3 y* m它只说回传 agents satisfying the given condition+ z) b3 o) B) l. V' C
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 ?
, W9 i& K: k, f. ?
m* G8 L" M7 c+ L: P2 b2 S+ T想确定一下: K5 W. d$ a/ H" w
谢谢!$ d* P# u! D' w9 _( P* d- H
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