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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& M7 G* c; V6 F# J/ K
其中有一段如下+ Z6 m1 B7 h1 a, }# D
ask turtles with [ infected? = true ] 9 H1 p S& b, f7 ~/ N7 y* f% p7 _
我原本以为这句会回传『所有』infected? = true 的 turtle7 m$ i/ q1 P" ]/ i4 l; w% h4 h
但看结果似乎不是这样。- F: L9 K0 l$ a7 ?4 R) T5 P
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假设所有符合条件的有 5 笔
' W2 Y& @1 R6 [7 x2 v7 Y) F有时候回传 1 笔,有时回传 3 笔,是不固定的
6 ~: J* [; N5 u9 E回头查语法定义9 z5 Z3 p, W( [2 \& u
with
. Q }2 V g5 L- j3 n Nagentset with [reporter]9 A6 W- e+ D% o6 `$ y
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.
# q: p4 r9 R* \) b9 w" M它只说回传 agents satisfying the given condition
( ], w" \5 ~( D! h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 ?
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想确定一下
# n# p9 L& K8 s. {$ O+ Y/ z; ?谢谢!
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