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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: D p# d% l {' d; y" p
其中有一段如下3 p# y( E0 @ Y; ^9 C) n$ ]& O
ask turtles with [ infected? = true ] + S' |$ z& H& {# n7 b- ]
我原本以为这句会回传『所有』infected? = true 的 turtle
5 @3 y# j5 A6 {: S( A; |但看结果似乎不是这样。
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假设所有符合条件的有 5 笔; ~4 I6 T6 }# [
有时候回传 1 笔,有时回传 3 笔,是不固定的$ L1 r b2 z* A6 e: r& A
回头查语法定义; S4 g; m) l% m! v! j
with 3 {! C" ]5 k4 N" c+ X
agentset with [reporter]2 G' w1 [2 ]* }8 [* h( p) G
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.9 T/ _' R% [& b/ C$ T/ {9 v; Z6 V
它只说回传 agents satisfying the given condition1 C$ X" v9 |0 i" {9 j) S5 C/ T4 D
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 ? / l1 P0 n# K- l y
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想确定一下
: t; W; j1 f: ~$ o谢谢!
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