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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 y5 H1 G E2 z2 t& g其中有一段如下
0 V C/ u4 z# g' d: `ask turtles with [ infected? = true ] 7 ]: a8 W8 T; D& s5 ]' Q
我原本以为这句会回传『所有』infected? = true 的 turtle
* k; v0 a* t' W, l* A" m: P- C% D" d但看结果似乎不是这样。6 O( w8 e$ R ]! X( c! F% O
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假设所有符合条件的有 5 笔
$ S5 T9 e" Z; B' Z9 O* _6 F有时候回传 1 笔,有时回传 3 笔,是不固定的' z7 D, M; S# ~8 R% A
回头查语法定义
! E0 O4 }" A5 Y" ?4 Zwith
5 A+ q8 } @( U- f* @$ z, Qagentset with [reporter]
7 f& G) y$ f( i8 V7 XTakes 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.
8 |5 `3 X3 ^- B+ _9 Q/ m; O它只说回传 agents satisfying the given condition0 ]* d$ a2 x- I: l
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 ?
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1 K5 X& Q* O' s# K' R7 B9 a$ r想确定一下
7 F7 x6 [; V4 \谢谢!
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