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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8 F5 d |7 R }* j
其中有一段如下
- S( t X. v8 W5 P0 B! Kask turtles with [ infected? = true ] ) m( P# u) `( e
我原本以为这句会回传『所有』infected? = true 的 turtle% {. u- T r& A! h/ H. u; {
但看结果似乎不是这样。% W5 H+ Q, m% m. J% h5 n
+ w; i Y1 q$ G+ M1 Q假设所有符合条件的有 5 笔8 @9 D5 L- f; j
有时候回传 1 笔,有时回传 3 笔,是不固定的
" L# {% e2 F! m+ Z回头查语法定义; f9 M$ C2 n$ f
with
- e) t/ g% r: s! N0 S( P- Cagentset with [reporter]1 G. h$ G* V$ [9 o( ]
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.! O; S% M w+ E# m* b5 r
它只说回传 agents satisfying the given condition+ K* }7 `: L: X) p
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 s0 u; q$ u' Q) C X# U
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想确定一下: J4 v2 ?5 ]1 [- O8 ~
谢谢!. Y+ T {" `/ K: t
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