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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9 S! D0 `9 K. M4 R5 |% i
其中有一段如下
) v, z& n1 V, c5 A& t: eask turtles with [ infected? = true ] 0 m: L2 Y, W3 d
我原本以为这句会回传『所有』infected? = true 的 turtle; J$ Z5 }4 v. P3 c( g2 U
但看结果似乎不是这样。6 q+ A E% S- \! ?9 t" g) P
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假设所有符合条件的有 5 笔6 k; q: Y4 j& \9 H6 o! J
有时候回传 1 笔,有时回传 3 笔,是不固定的3 x* B; s- {. Q7 H2 _) \
回头查语法定义
4 [: i( O. G9 [1 u/ {3 \with
! K, a& _* v- S2 `agentset with [reporter]
]# O6 V1 a& ~3 P9 A" TTakes 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.* s9 T# P4 [; U! X7 x$ b
它只说回传 agents satisfying the given condition. N5 K& y( n9 G+ d/ a
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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8 P5 h0 m3 l: ^& s9 I想确定一下
4 A) c; }. y8 T谢谢!8 E" c* ?+ Z# M7 }# C" z( `
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