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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
( l& `4 h( v/ Q其中有一段如下2 v9 v9 _5 j1 U; e1 Z( K* D5 r
ask turtles with [ infected? = true ]
$ A3 N% e) D9 Q6 @我原本以为这句会回传『所有』infected? = true 的 turtle
; C0 o4 n" _7 X8 s: h3 U但看结果似乎不是这样。0 T( {* t! }% `' |/ w
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假设所有符合条件的有 5 笔
1 a! z- a& S7 L" ^: s有时候回传 1 笔,有时回传 3 笔,是不固定的! R: W* |: v$ u& |
回头查语法定义3 x( N$ R1 n* W4 y/ |5 _- p( Z
with
( c0 A+ c6 D" E2 J2 q b+ l* O, Fagentset with [reporter]
( `# j( n. {; Y3 J8 a4 cTakes 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.
) n7 o; {7 l: i" x! x它只说回传 agents satisfying the given condition
8 }8 _" d' P2 [9 B; J }9 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 ? : f- [3 J6 D$ x3 U- |
' f5 U, \+ H4 c想确定一下
, I8 ?- j* H1 V0 t3 S$ M谢谢! r, C: Q. F& J' F, E; h; d
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