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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: ~& `: _0 q$ \, [: L其中有一段如下
* M3 r8 a a: p7 f5 ]' }' Mask turtles with [ infected? = true ]
0 X/ Z: B5 @. ]# R$ o* O我原本以为这句会回传『所有』infected? = true 的 turtle' Y! f) {' O/ U0 ?% @; {5 G' _
但看结果似乎不是这样。6 \- O1 J5 P8 w0 J1 f9 Q
3 j7 A# P1 \- q$ P
假设所有符合条件的有 5 笔+ O% v. c( I6 ]& }) n& d& G
有时候回传 1 笔,有时回传 3 笔,是不固定的
+ b$ h. c; J+ e d9 H9 D5 N3 R回头查语法定义
' n3 z3 \) o- X" `& c# zwith
, ]7 B) y+ Q, `; Pagentset with [reporter]
+ L A+ X+ y) t0 u$ i0 ATakes 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.
$ }: |% o9 |/ R) O它只说回传 agents satisfying the given condition! m% P" Q8 X. ?) @. G6 V
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 ? 6 z5 V) @9 J/ Y& t
+ B& h ?# }2 v, w2 I想确定一下3 {4 j8 L* E8 b) M: h
谢谢!% r G& h1 U7 P v
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