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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
1 s) u6 {) F8 o& S2 c其中有一段如下
' D8 R. O% b5 t& ?ask turtles with [ infected? = true ]
5 T4 V5 j* O: b我原本以为这句会回传『所有』infected? = true 的 turtle4 z5 W, s$ G+ A# Z7 s: P y
但看结果似乎不是这样。
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( U" z* r9 R' @' N4 H+ |! V假设所有符合条件的有 5 笔
" \8 q& s' t4 E6 z7 Z; S有时候回传 1 笔,有时回传 3 笔,是不固定的
5 P9 W( a. M. x9 v. |回头查语法定义8 T6 K' ~' I4 _
with : ]6 R! v- n( }& T, T" k
agentset with [reporter]
4 ~1 H1 E Z- \- }& o' D; pTakes 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. p7 I0 e6 n' h, q" f& M+ I
它只说回传 agents satisfying the given condition
/ E' M, P* L- A1 U2 q, p$ ]; p% R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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4 T1 V$ u) a. Q0 U9 j" w$ ^想确定一下/ s% U1 f7 R* l7 D2 f% Z' p
谢谢!
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