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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
4 u: _! i' S0 D! P' u" v5 [+ P3 s其中有一段如下7 M% o4 Q8 ?4 n* B7 K
ask turtles with [ infected? = true ]
. g, `) T- a3 k0 R" f我原本以为这句会回传『所有』infected? = true 的 turtle& P5 U6 I+ x* }, R% s6 V; A6 C
但看结果似乎不是这样。" M# c& T& N5 g$ U
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假设所有符合条件的有 5 笔0 L6 k! k. O* Q3 M' |! |+ E. r4 r
有时候回传 1 笔,有时回传 3 笔,是不固定的0 [) \! c8 c' }6 C, R( y3 E( w. ~% ~
回头查语法定义
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agentset with [reporter]! q0 M, ?. e/ _8 m( y% A
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.9 Q. u4 S- d+ Q. o8 P# b3 `
它只说回传 agents satisfying the given condition/ R6 i4 c3 h" d! `9 z
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; [5 a( |1 W: G7 ]7 h8 k2 ]* ]7 I$ Z
谢谢!& e! m" N2 A. S% c
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