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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
8 G. k6 A4 Q" `) b- B6 `$ s$ ]其中有一段如下$ V1 A( P8 S- p8 | l5 b
ask turtles with [ infected? = true ]
% c9 v9 f6 w6 }/ ^& r/ j我原本以为这句会回传『所有』infected? = true 的 turtle
# c8 a2 P: v ^! q- a但看结果似乎不是这样。
( m, R; e6 `% y- J7 q- N
2 o& M/ [5 k+ s1 i假设所有符合条件的有 5 笔
6 a5 j) g- s! \7 z# E' n+ O有时候回传 1 笔,有时回传 3 笔,是不固定的& ]* Y' c, b4 Q% P- c S) C' e/ {
回头查语法定义
* e4 D, ^7 R1 q1 p" s' N) _with : L3 S' J* I0 V6 F m
agentset with [reporter]
" k1 b0 Y6 d1 H9 `4 Y9 ?6 `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! b9 |' _& i! y
它只说回传 agents satisfying the given condition, a0 l7 t) Z7 k. \# ~
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 ? 4 F! p- p8 T8 t8 t) _% r+ M6 Z/ e* `
. P: g8 ^1 l7 o3 R: t2 s4 A% m4 D想确定一下3 V% [' P2 H( L
谢谢!; i! M5 v: a3 Q$ z6 V, A
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