|
|
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
* O! H4 ?5 g0 |1 X$ x- {其中有一段如下" I: b* L* R% j! f8 @: D
ask turtles with [ infected? = true ]
' \. M7 T- _* Q- [* L3 j我原本以为这句会回传『所有』infected? = true 的 turtle
/ m u7 j* B. q' [但看结果似乎不是这样。
* l' \5 u$ d M2 @2 \$ `: F9 M
2 a$ E7 P% X3 Y/ ?, h2 C: r假设所有符合条件的有 5 笔
$ m( v V+ w. P' |! V2 x) t有时候回传 1 笔,有时回传 3 笔,是不固定的
: V# ~2 r( V3 {; M8 a, j- N0 W回头查语法定义
1 f3 f1 i( N7 C8 a" P# j0 Iwith 2 r; l" H3 b# o& r: G: {, N I0 v O
agentset with [reporter]
; ~' t( G% P4 RTakes 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.1 Y: |& y+ K0 y8 q) T
它只说回传 agents satisfying the given condition
3 J% h- `0 w3 v1 U/ P% g" p/ h1 X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 ? ( y. j0 K- @# _: B
; a9 z0 p6 i8 D& e
想确定一下
7 {: M$ r4 ~9 O1 h谢谢!& ^2 S" b0 c( V/ v+ s: {: z a$ Y W: h8 k: L
|
|