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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" i) S A3 z& Y! g( j" C2 Y9 x7 J其中有一段如下
3 r# W$ i6 S/ Q- `& r& F4 yask turtles with [ infected? = true ]
' Y% W+ }. |* E% J2 d L我原本以为这句会回传『所有』infected? = true 的 turtle3 c8 ^& ?3 e( T+ R" @& P2 `
但看结果似乎不是这样。& K+ f0 A: c' A0 }' T/ b
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假设所有符合条件的有 5 笔
8 J% D, M7 R& \/ A" Q. s7 ?有时候回传 1 笔,有时回传 3 笔,是不固定的0 |: c: A9 v% m/ M# n" Y
回头查语法定义
7 w$ d* \8 h, [9 x* V& Swith
* M3 ]) ]0 ^# f; L; S( wagentset with [reporter]$ M( g# C% P) P) _$ G( @: l+ ?
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.
0 R; @* }9 X& A e/ [/ Q! H它只说回传 agents satisfying the given condition
/ n' d/ B9 d- O$ U: c. p9 W- 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 ? ; C; d. E$ e9 w+ D4 n
( ]6 A' J( Z$ ]& w; @6 n, d
想确定一下
1 d: q5 q! r3 j4 x5 [谢谢!
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