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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
# b: ~# a' J& p* f* y% E其中有一段如下( c8 A# ? [/ `9 }+ T# }# d
ask turtles with [ infected? = true ] # @: ^" h2 f8 ~8 G. C# ~
我原本以为这句会回传『所有』infected? = true 的 turtle
) m" y! Z1 x; D- K6 I! K) b9 Z但看结果似乎不是这样。7 J( V1 H# f0 c& }
7 o+ j8 M+ \. e& Q; k2 ?) u6 ^假设所有符合条件的有 5 笔
) T/ K4 m+ h; K% ^! `! {有时候回传 1 笔,有时回传 3 笔,是不固定的. B( m9 q% p( s* b+ h {
回头查语法定义3 H3 s8 L& z" Z& L6 |* z
with , e( j: ]' J! E7 X
agentset with [reporter]
, u. C! U8 e9 I! Q0 [, jTakes 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.
( S3 F& n2 \; O- G7 J1 m' j它只说回传 agents satisfying the given condition
9 I9 v# M* ?0 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 ? ! W+ }# M5 n L, `4 p
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想确定一下1 t' z$ N' p+ ], o7 ]
谢谢!
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