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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
5 W, l7 ]9 c- f* C* q' ]+ Y其中有一段如下( a# K) E' C" ]5 s l
ask turtles with [ infected? = true ]
& l3 p- i) F2 v我原本以为这句会回传『所有』infected? = true 的 turtle% Q# _1 V& G9 D$ L
但看结果似乎不是这样。9 E# J [* \1 \
* Y7 H0 Y8 S! ^8 h' u假设所有符合条件的有 5 笔6 y% n. m5 v& E6 K
有时候回传 1 笔,有时回传 3 笔,是不固定的
7 E" G& U" B, K% @1 x3 R回头查语法定义; ?) |' k- w* m7 o& m
with ! L$ O F! F0 I! k7 ]. P! Q
agentset with [reporter]
* q2 }( X8 R# P" 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.
' s' @! D# ]8 i/ _+ w; q' J它只说回传 agents satisfying the given condition1 B" Q# h3 Q/ Y
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& {/ g T3 v8 U! b
谢谢!
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