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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
( z4 f" ~2 q6 l/ f1 x7 @! \3 r8 w其中有一段如下" h, c6 W- ~+ h8 F5 o
ask turtles with [ infected? = true ]
: S* b' j1 }; v* W* }我原本以为这句会回传『所有』infected? = true 的 turtle
* |/ M, j9 b; v" h# g- @# Z$ H但看结果似乎不是这样。/ o2 g% d" e7 e; K' O2 ?+ Q
! @; q. K' w& z- | N假设所有符合条件的有 5 笔
) g" p' B' }$ W+ {1 S/ ?有时候回传 1 笔,有时回传 3 笔,是不固定的# Q* {) j7 f" G; O/ _3 I1 ~# d
回头查语法定义
6 h6 @6 D( v. Q \" i: U7 @: pwith
9 x3 v% u2 ^4 Q2 e' e0 c5 }6 N" J5 vagentset with [reporter] D4 |1 m" H1 S
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.
. h* K: _$ ]0 V: m6 a0 h* m它只说回传 agents satisfying the given condition
$ M9 u. D. s/ U0 p$ q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 ? 4 s- [& |) r2 v6 H0 t! I
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想确定一下
- K# I( ?; ~7 n2 c4 W谢谢!8 F& e% i9 L' F
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