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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
- T& H% i6 E7 ~: _: J, O# o其中有一段如下
( z& K3 b6 v' l0 Vask turtles with [ infected? = true ] 1 D8 B& B7 ?- U9 |- F- U& p
我原本以为这句会回传『所有』infected? = true 的 turtle8 S' \1 n0 E/ d3 I @
但看结果似乎不是这样。4 i: k! J* J {0 m) ^% K3 |$ t! ?
8 ~1 _, [8 o% I假设所有符合条件的有 5 笔9 f& T. \8 T. u
有时候回传 1 笔,有时回传 3 笔,是不固定的/ s. f1 D# L* E; j1 D0 M
回头查语法定义/ G# {& l C& b) y' `
with
9 @0 ?+ {% O! c vagentset with [reporter]
# j2 T9 ^+ N. _7 R) @! h' iTakes 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.
5 ]+ b0 a$ A# M y& L9 Q3 ]它只说回传 agents satisfying the given condition# L7 |( x5 i& r/ G; b
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 ? # Y% O; o. N1 I% c
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想确定一下
/ r( |. j$ k/ |6 A谢谢!& d; z4 g" g3 m: {0 f; d" ] a
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