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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
# A) ? y; u% P+ z. @其中有一段如下8 f7 s9 }8 ~' z" }5 j: G2 e
ask turtles with [ infected? = true ]
9 N U% j* P4 o$ ?我原本以为这句会回传『所有』infected? = true 的 turtle
+ M! w( T* i$ U. |* G1 M但看结果似乎不是这样。
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3 x2 V6 D& w: g6 o1 e" n8 e! V7 N. }! t假设所有符合条件的有 5 笔, Z; j) q6 M4 o
有时候回传 1 笔,有时回传 3 笔,是不固定的
, A/ q# R. l( P8 d. X回头查语法定义
$ B- @6 E. @1 ?$ z- hwith + [- h, N+ x W; X3 f$ G' s
agentset with [reporter]
9 A2 ~3 H5 Y1 U* T1 q5 ZTakes 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.
7 \; ~+ k' \9 b% b4 n8 E/ o* ~它只说回传 agents satisfying the given condition: M$ B# t1 B- N }! y9 `
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 ? ; e7 Y! o b* d4 J$ y* v& c% V# P
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想确定一下
* g% X6 f7 n0 [/ d @6 _1 t谢谢!
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