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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
7 A* \" i2 D: F其中有一段如下3 L2 u% Q" x4 \& h# Q1 z& @% Q
ask turtles with [ infected? = true ] w* _$ i! V' d4 B# U) |
我原本以为这句会回传『所有』infected? = true 的 turtle
# I+ M1 {6 R5 i8 o$ L但看结果似乎不是这样。4 A: }4 }+ H- W+ u; ~
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假设所有符合条件的有 5 笔
1 ~3 b8 H# ?/ J; E有时候回传 1 笔,有时回传 3 笔,是不固定的2 X/ `- j4 \! U% a( P6 ?
回头查语法定义
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4 j( c# |$ u( R. _5 j1 Aagentset with [reporter]
! c3 k( x/ z4 @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.
. _7 w1 P# ?. G; p' L# l3 w9 d它只说回传 agents satisfying the given condition# y: r' S; W* H# ?4 @
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 ? 1 O* i. i3 }. h8 c
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想确定一下
$ j3 l+ @7 C0 y0 Z谢谢!
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