|
|
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; ?% H' x9 C* S% k; D/ g
其中有一段如下6 D! o+ p5 O4 n& X0 D! q( L2 i
ask turtles with [ infected? = true ] : W4 L* |/ Q0 R. @( z
我原本以为这句会回传『所有』infected? = true 的 turtle
4 d/ l5 Q' [5 ]6 J但看结果似乎不是这样。+ b& ]* u0 a7 Q! P+ A1 H8 U
& `6 _, i; x3 `假设所有符合条件的有 5 笔
& s6 I- E. W. W K0 W1 p有时候回传 1 笔,有时回传 3 笔,是不固定的
% x( f7 ?% t+ g9 [' ]回头查语法定义& x7 e! g6 h# ?; o8 P
with Z4 |1 I+ a; I- M* P h, ?8 I
agentset with [reporter]% k: t# ~9 y. R/ p* H
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.
, `$ z5 S R" {$ ]2 b它只说回传 agents satisfying the given condition7 s8 M- J& b- N$ z/ @6 f3 |: f
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 k$ Y3 W, Z7 z) N7 t
6 M6 H3 |3 N; y8 Y" J5 _* n, g想确定一下* G6 K- p: v6 j) Z8 W& {
谢谢!
; @' X/ f5 g; M7 d( _# }4 N7 u |
|