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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
- b* s' N% u* G+ }其中有一段如下
( u# p$ S+ O! t% }7 F) |ask turtles with [ infected? = true ]
5 A; H# m) g' v5 O我原本以为这句会回传『所有』infected? = true 的 turtle* X! Q& g$ ?" k2 l6 d2 M
但看结果似乎不是这样。: t8 M5 |- }1 g/ Q- l* n3 e" y
( m# P- N. |+ U8 X( J) G
假设所有符合条件的有 5 笔9 d5 `! \& b, E" ^2 q
有时候回传 1 笔,有时回传 3 笔,是不固定的 C y# c' ?. U0 D! I
回头查语法定义
( [8 m5 J6 G+ o4 k* L ywith
- L* n4 P1 }2 @ Fagentset with [reporter]
* b0 L6 l$ m% V A* { @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.
6 v' ^5 e3 R& z" w它只说回传 agents satisfying the given condition
# i3 J- Z% B$ [# R+ K N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 ? 9 }& f" e9 w) v5 F8 |
* G2 C+ W& [5 w9 q想确定一下
8 M4 C+ }1 I% T7 Y谢谢!; `% I, }* s& ~: x# y( M
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