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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 |& ]% v0 G6 Y6 n* k
其中有一段如下1 P* V4 G- ^9 r: H/ s! M$ y Q
ask turtles with [ infected? = true ] + `. I8 Z2 K) D& Y
我原本以为这句会回传『所有』infected? = true 的 turtle6 y6 K9 E! T, G! x: ]4 W4 o! r
但看结果似乎不是这样。
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+ e ^4 e4 U( \ w9 [; ~3 W' w假设所有符合条件的有 5 笔
8 x" f$ g8 X9 j* O9 [7 H, e4 j: O" ^有时候回传 1 笔,有时回传 3 笔,是不固定的 ]8 G5 l% I, A- B. W. v/ l/ e3 N
回头查语法定义( r& C P" `$ ?6 g- s- S+ Y
with
! d9 w; k7 v- R6 r7 qagentset with [reporter]: q; N/ y& F. e7 k$ v
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.
4 Q- t- q% M3 k5 e; G; ?它只说回传 agents satisfying the given condition
- [8 C& g4 z) z8 W, q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 ? " }2 c! p ?& w7 @9 V+ r# M* o
2 Q6 y* b# Q% ^/ S6 m想确定一下
( C8 S* i. s( r9 Y& V谢谢!3 `& I6 R# l1 W* B0 \, g
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