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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
- d6 s: g& M1 K' [" F/ g0 O [5 L其中有一段如下1 c: d& k2 n$ N0 L. x+ o
ask turtles with [ infected? = true ]
9 `4 \+ p l7 s0 R7 H1 u* }我原本以为这句会回传『所有』infected? = true 的 turtle T5 V) e$ _; R( V, r
但看结果似乎不是这样。, \) I' Q# u8 ]- ^
- Q/ M0 Q" W4 P8 _+ p% [假设所有符合条件的有 5 笔. e* @3 g. n: q3 E
有时候回传 1 笔,有时回传 3 笔,是不固定的0 \. U4 M8 w* i4 X
回头查语法定义
; ~$ O( o- ?5 H7 Ywith
0 H$ U" U: t/ \" R0 z# [4 B: G7 `$ Wagentset with [reporter]9 I! _1 C8 y; p+ I9 \
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.
, B$ \) r! Y/ r( {1 k' u+ Z它只说回传 agents satisfying the given condition
, V, E# Z& s# s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 ? & o( | f( j6 D
9 i" u5 \6 m0 R, f* Z* z想确定一下1 T* H8 B6 k- ]) @9 K0 b3 m# B
谢谢!
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