|
|
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
" e1 M; g7 i3 U' `) R其中有一段如下2 G4 H1 ]5 |2 W& O+ v) h3 [' x* Q
ask turtles with [ infected? = true ]
6 T z* ?8 U+ z1 h4 n我原本以为这句会回传『所有』infected? = true 的 turtle1 ]7 G+ U ^( D0 z3 H
但看结果似乎不是这样。/ \9 C/ c% v3 N$ G& q% l& y1 s; K
z% x6 F# L2 @+ E4 I假设所有符合条件的有 5 笔
2 [8 |: Y V8 ^& A, z) P8 z有时候回传 1 笔,有时回传 3 笔,是不固定的
3 {$ d6 c% \2 `* z1 T回头查语法定义! n! [5 l4 l G; D
with * M d9 u8 W" S- n2 N- m
agentset with [reporter]+ G" T$ Y8 ~4 g* H9 M
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.; x3 [3 t3 G- p& ?) H# c" @6 S
它只说回传 agents satisfying the given condition; Q- B) ?; A" i$ m9 x) l! X2 S
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 ?
0 |9 F! E# c1 y8 G" g( P8 _
1 C) y0 Z5 D" i/ Y想确定一下& K: T8 c5 \8 r/ D
谢谢!
7 i: i9 u( ^) N |
|