|
|
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* a7 M: F1 z# y ]# b. p; m; W
其中有一段如下; ?0 j5 X ~; O1 E. R9 m
ask turtles with [ infected? = true ]
H: c1 L. Y" i; `6 D2 @1 p4 }我原本以为这句会回传『所有』infected? = true 的 turtle
3 S! t, U+ f, I: g3 k( C但看结果似乎不是这样。$ t2 H! O9 |. q% [, j
' i6 M8 _7 h8 i4 }# J( c* d$ v
假设所有符合条件的有 5 笔8 A9 `9 K* N& l; N
有时候回传 1 笔,有时回传 3 笔,是不固定的
# W) Q2 ^9 }' _7 {, h1 A( T8 R9 I) ~回头查语法定义( Z( B5 W2 e* g
with 3 K/ D) g: g: E, s0 b# o
agentset with [reporter]
, ^% Z2 c" p7 e* u7 M; D/ DTakes 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.8 {. W+ N" N( z+ d* [
它只说回传 agents satisfying the given condition6 W! o$ x6 B U9 x; A H2 W
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 ?
1 g1 I7 y5 T& }3 n, w6 n3 }: f+ a# `, f& t7 n6 l; C4 W& o3 o
想确定一下* D& r+ ]% ~) s7 i1 n
谢谢!1 {% _% a* {/ X" ?" t
|
|