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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
" k" s5 o( U' N其中有一段如下
d4 q$ o' y rask turtles with [ infected? = true ]
. W. [0 ~ V) G, v/ {5 t0 N2 ?我原本以为这句会回传『所有』infected? = true 的 turtle/ s/ x9 |3 j3 U, m! h& J& i
但看结果似乎不是这样。 ^5 Z0 d# J7 m9 p( y8 C7 p f( U$ w
2 h9 ~* K2 T6 L& L$ K, i( R8 m8 t假设所有符合条件的有 5 笔
; g+ x9 f4 g8 |* ?7 N$ `' o4 ^5 G. A有时候回传 1 笔,有时回传 3 笔,是不固定的
1 w* T5 |6 J+ z! F. P( @回头查语法定义& [, x" M8 W7 g- v3 p# G( k1 h
with & O0 K2 z6 g& ]- J o4 q. r' i5 H
agentset with [reporter]
# j x3 H2 s7 M& y- t9 {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.
5 `8 q2 s# C- A7 ?- J" \- n `它只说回传 agents satisfying the given condition. n7 G4 T# P: F4 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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3 b4 ^' c6 m8 |5 C, c8 r想确定一下
. Q8 A8 l% s7 n7 c, z谢谢!
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