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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
3 M& |. N+ }) W! @5 X其中有一段如下/ R, P9 J& D1 F# H d
ask turtles with [ infected? = true ]
: r( \; X; g7 y4 F6 {我原本以为这句会回传『所有』infected? = true 的 turtle
. l- i7 |: L6 ]4 D但看结果似乎不是这样。) s, y9 e7 h2 M. z6 J0 U
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假设所有符合条件的有 5 笔. `3 z5 k9 i2 H( T t9 \& z# q
有时候回传 1 笔,有时回传 3 笔,是不固定的
" D4 i* V8 d. M F' ?4 Q回头查语法定义: f! ~1 m: ^/ k4 P, L0 S+ v
with : [! l( J4 ?) U* b+ d+ f5 U
agentset with [reporter]. Y2 ?2 l/ P5 ]2 F2 l2 k! o" t
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.
; R+ |9 [# ~, f它只说回传 agents satisfying the given condition
4 L* D& J v6 z! a7 {" _2 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 ?
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想确定一下0 U3 d: K! b/ }$ [
谢谢!
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