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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; d) L% ~6 E J1 o3 U: @
其中有一段如下& F ~8 T" ^' W3 m
ask turtles with [ infected? = true ]
3 v5 E5 L# R- n U; k" w我原本以为这句会回传『所有』infected? = true 的 turtle' R$ z2 ?/ {8 ~8 x, g" J
但看结果似乎不是这样。. Z, t9 n7 N* b1 A
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假设所有符合条件的有 5 笔9 P/ f9 _8 e6 n- V- u
有时候回传 1 笔,有时回传 3 笔,是不固定的" o1 r2 Y. l F Y4 A& w. w* ^- x
回头查语法定义
" m( N; t! F. r vwith
8 H8 w% w& r; _! x0 x6 O1 cagentset with [reporter]
n5 }* w2 M- z, x7 V& D# nTakes 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.
' J& y& Z! e5 O它只说回传 agents satisfying the given condition
$ S# H% E0 ]9 P# k$ i* [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# b }3 O' J8 h- M$ @
谢谢!
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