|
|
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
, Z5 a/ d) z4 v其中有一段如下
4 J) P d7 H5 _ask turtles with [ infected? = true ]
* L1 W- G c) p& F& }我原本以为这句会回传『所有』infected? = true 的 turtle" `" _! C7 I& B, H/ p
但看结果似乎不是这样。
# p8 @, W8 B# A/ q, |" J' c* h) g U# O& c7 i; z
假设所有符合条件的有 5 笔- `+ ?) W9 G1 a- c1 I, H3 }. O
有时候回传 1 笔,有时回传 3 笔,是不固定的, _" W" v8 n/ A8 p, Z7 N0 b
回头查语法定义" O# a4 @: B- O' M; ^
with & _! N: ]* l2 t U, s8 P
agentset with [reporter]
. X9 k+ g6 a: o | @- h! i9 A6 }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+ p- S) n y' b) L9 Y它只说回传 agents satisfying the given condition6 [! u4 U6 Y; 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 ? ) i# \ f% H/ J l
) z& t/ S% ^" u5 J3 g4 b7 M" }2 K
想确定一下
# c1 i, ^7 H T7 Z) B谢谢!
1 H: k. M7 @$ D7 D% ~6 q3 b |
|