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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
. B9 Z$ ^. N J( N+ R其中有一段如下6 Z5 z' `4 O$ W$ n" A' N( y# R+ c0 a+ }
ask turtles with [ infected? = true ] 5 x: \/ ^/ p/ N: ]
我原本以为这句会回传『所有』infected? = true 的 turtle
9 }/ H! `/ b* ~4 A但看结果似乎不是这样。 V' e' ~3 F2 r x
0 \7 B; ~9 a+ k假设所有符合条件的有 5 笔
9 u% k! `3 w$ y有时候回传 1 笔,有时回传 3 笔,是不固定的3 `- J, ^1 `# O- ]0 ]% g- G, C
回头查语法定义) M( U( {( @# B1 C! n. j+ h
with
]* u7 Q4 k% p( f) Iagentset with [reporter]
9 W4 `/ n$ y4 gTakes 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.' y9 r0 x! z1 O3 O# y: t
它只说回传 agents satisfying the given condition
* K7 ]% W; r3 p, k6 H4 Z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 ? 9 B9 p" I6 J( K2 m( K/ x% K. [9 j, i* C
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想确定一下/ M) |' J. F5 r- O1 f
谢谢!
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