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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
) y: H( M* T3 ^" R% T- r其中有一段如下/ g' `0 j" ~( D' G6 D" g. ?
ask turtles with [ infected? = true ] ( j ^/ s( P6 Y3 V. n& F
我原本以为这句会回传『所有』infected? = true 的 turtle/ I' X1 @( v' r% x/ i& i9 E
但看结果似乎不是这样。
1 n7 H/ i# V- O9 P4 B0 e! D! }; f0 n0 b( Q2 n( @
假设所有符合条件的有 5 笔9 j, h7 l7 ^1 m3 { u+ K( k
有时候回传 1 笔,有时回传 3 笔,是不固定的& T `6 m, w) l7 s4 A% @
回头查语法定义
+ e6 d" I) r$ |. V5 h5 |, f7 S! S0 c6 lwith
, S8 r+ T: ]9 q: wagentset with [reporter]# j6 L1 s/ w" y3 z2 B
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.
7 Q! O0 D# z' C: H它只说回传 agents satisfying the given condition
{2 k7 N ?3 p+ {. 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 ? d6 o3 g; B7 c6 Y) }
+ f( I* B1 y6 H V想确定一下
( v! H2 M8 V7 E6 t& Z谢谢!
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