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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
, A1 K ?1 V: u8 e o! p& _$ n其中有一段如下+ g5 @+ S: H/ z) b2 _4 a l& T) _; ?
ask turtles with [ infected? = true ]
. A" ~; T. h& i' h2 s) C我原本以为这句会回传『所有』infected? = true 的 turtle% t) X3 u' Z& l' Z
但看结果似乎不是这样。0 ^, w2 A7 ?$ a: m" \( {% f
0 n3 D) m+ P" G; X) `5 k( [假设所有符合条件的有 5 笔" g" v7 z4 L+ [2 D( D
有时候回传 1 笔,有时回传 3 笔,是不固定的
9 d# z: _3 g( v- n- q% z( W回头查语法定义" Q: I7 ?# Z- f" p
with ( {* n5 S, L8 T5 a8 s
agentset with [reporter]
4 }' C ` Y' `/ F+ I1 U* S+ r: ]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.
2 d/ g- h9 j( x: i1 A3 H" F它只说回传 agents satisfying the given condition
+ \1 ?* t) G* 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 ? # X. c7 G" O" W
' X6 f2 X5 I- [想确定一下& [* P% h0 m0 k2 T* i: j4 c1 M
谢谢!- X: r+ E4 z q' s9 O' q, j1 Y2 b5 z5 [
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