|
|
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/ U* O2 F* ]& O, w
其中有一段如下8 b2 m9 q. a5 r
ask turtles with [ infected? = true ] 5 d( b V' a, ]$ J: u
我原本以为这句会回传『所有』infected? = true 的 turtle6 T _$ b, t4 x: b
但看结果似乎不是这样。
- B$ ^; C5 `! y% b
7 t; G" _( m6 D, }, h: b, H6 y0 h假设所有符合条件的有 5 笔6 U0 C' I) I# w/ K
有时候回传 1 笔,有时回传 3 笔,是不固定的
6 s- {& h& O+ [3 t# i回头查语法定义
: \) i- t* {% Wwith $ R1 p- l' J, O4 y: z% l" W2 l
agentset with [reporter]% H F+ t& k# a1 N2 j! q+ `" R
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.5 V) l" v4 T5 s) }* t
它只说回传 agents satisfying the given condition) _% }' Y# r; P5 j
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 ? & C9 E( M$ B/ w' `' l& m
s$ k: u3 }2 q6 i
想确定一下
F/ t( E0 H' {谢谢!! O: I: a2 X4 X+ |
|
|