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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
f, d' ~, O( G2 Y7 W/ O其中有一段如下3 F5 {- Y* {& b/ Q) n# @
ask turtles with [ infected? = true ] ' w5 N! t" z( w. k% |: E
我原本以为这句会回传『所有』infected? = true 的 turtle
) p: P2 x9 h) u( U) s8 d6 i" o但看结果似乎不是这样。
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/ a( z0 o2 c) n8 z/ Q假设所有符合条件的有 5 笔
( i; h0 x- p) R# x$ z% }4 O( S# I有时候回传 1 笔,有时回传 3 笔,是不固定的* G5 t9 Z/ s% ]+ y: C2 a
回头查语法定义9 e& K7 p9 g+ p
with
9 z# T8 h4 E- O9 z5 _; ragentset with [reporter]
0 h: k# g. U/ M8 ?# I- a5 TTakes 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 F. P. C5 `; S& B. d
它只说回传 agents satisfying the given condition9 T* c6 d; }0 T) h4 R: 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 ?
- O/ |. n( I' g
( F3 Q: ] d( c$ q6 `0 n想确定一下7 t$ ] W% h% W9 |5 t5 {0 w
谢谢!* h1 h0 M5 U% O/ A* H; P
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