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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
1 n: i9 m0 T$ h: \, b# C其中有一段如下" n; v8 ^. ^: s7 W7 h) w
ask turtles with [ infected? = true ] 4 B. L Q5 r/ i, T* g' Q2 Q. c! A& h
我原本以为这句会回传『所有』infected? = true 的 turtle
$ v6 D# ~4 I P# R8 L但看结果似乎不是这样。
5 \: I% u" d( n" x( Q& x, x
- N* w+ M; j/ T* h假设所有符合条件的有 5 笔
$ v% g5 A% S/ t+ N6 Q" c" W有时候回传 1 笔,有时回传 3 笔,是不固定的! [, @) T* `# S( P" l9 P4 e
回头查语法定义6 F% f( @9 o2 n0 {: `
with 0 e) l1 s) b# x s' I! I
agentset with [reporter]
8 `, ?( L1 T9 Q* y1 p4 J' f3 HTakes 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.
4 Q# |; E# E& L( t6 J; [它只说回传 agents satisfying the given condition0 I, p' t+ a( x" A- L/ r) b& [
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 ? ; z! S( y! o+ I) [/ V
3 ~% ?5 i" A) a: B8 ?/ J
想确定一下( V4 v9 w9 `8 n5 G/ t3 K( u ]
谢谢!# a( x+ W( O* l- m. L
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