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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
/ o a# U% j% w- v# V其中有一段如下8 O1 z! n4 m" o0 M
ask turtles with [ infected? = true ]
2 T3 h5 W& V& T" d9 }6 p我原本以为这句会回传『所有』infected? = true 的 turtle$ E" z0 B y7 u# P4 P6 }& q8 j
但看结果似乎不是这样。6 Q% X5 i7 G" C8 s( S
: j- P/ ^7 Z4 o' g假设所有符合条件的有 5 笔
. W0 V1 J$ z% v* Y有时候回传 1 笔,有时回传 3 笔,是不固定的/ i2 k+ I. g8 d4 O/ j
回头查语法定义
; b; v6 \" K* _, Z8 b( pwith
; {$ Q9 ~$ p/ F6 J7 `- O" cagentset with [reporter]
: h. }0 _! n* K% m/ M5 ?7 H2 m$ vTakes 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.# q* P/ ^9 p8 m: A
它只说回传 agents satisfying the given condition+ m3 y' f7 q0 Q' u4 j" 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 ?
- _3 U( |9 Q, P5 k2 r) Q$ {: u* B# j) U0 b- n# o* t' f
想确定一下: U# c) _! h& b) B( x
谢谢!1 K# v3 e" ?* T; \# e
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