|
|
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
7 X0 l7 k- A) ], ?, i6 n其中有一段如下; a) g: }9 M5 x! z* i$ ]
ask turtles with [ infected? = true ]
2 _6 J- f) E3 T; s+ Q' q我原本以为这句会回传『所有』infected? = true 的 turtle
) v1 K1 i* }; T$ _3 \ H2 Z但看结果似乎不是这样。- d, F; o0 p1 q- h8 g
# f U) D* a0 A8 l! r0 K( R
假设所有符合条件的有 5 笔
2 N& M5 H) y6 c& }3 {" m有时候回传 1 笔,有时回传 3 笔,是不固定的. F( X$ ]3 p$ n; q$ k, }( s: L
回头查语法定义
, N7 f2 P& c2 m5 R3 Iwith
& k# f& c0 u( T7 o+ B# {- Iagentset with [reporter]2 n8 @7 }+ J0 ? t/ `
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.
* d$ P1 p; O* O; Z它只说回传 agents satisfying the given condition
3 D4 r" ?' a) z" e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 ?
# G/ M* S% g5 o' H8 J
$ Y# V1 B) a: n( j8 N" p想确定一下) z3 q1 M0 n9 Z/ i. P; J
谢谢!* q( l5 A6 q7 [1 B1 e0 t
|
|