|
|
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$ w9 N; {其中有一段如下& z! y4 R; t7 l& E; G3 k r3 M0 P
ask turtles with [ infected? = true ] 5 W3 e5 W2 b1 C: x( s+ _9 i5 p4 R3 W
我原本以为这句会回传『所有』infected? = true 的 turtle' {( K/ y8 p( w0 _
但看结果似乎不是这样。5 \- M% G: _& Q! d) `; G0 ?
6 _' k0 P, N7 {# a1 p假设所有符合条件的有 5 笔
" d3 c: u$ n, @# I) b# e% a有时候回传 1 笔,有时回传 3 笔,是不固定的0 l0 R8 n" I; s2 P1 x
回头查语法定义
% p# z+ ?/ x8 _! ^% a2 r# ^with
# {6 G$ }) v/ X+ g' |$ z* S/ ?agentset with [reporter]
: S, x/ \: Y M" A7 X% oTakes 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.
% P$ r* J$ l) R4 u它只说回传 agents satisfying the given condition
8 e5 E/ C/ L$ Y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 m$ Q8 G C0 e
6 ^ P! p; B+ A* Y
想确定一下( h5 I' B/ U& R( Q
谢谢!0 g* _0 ?. y: I& z p" d
|
|