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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
' V6 l3 F; T }" j: {8 b6 O, g其中有一段如下 p( V8 m4 O& h; y: _( ^& V
ask turtles with [ infected? = true ] & v( `. Y& l: M( w
我原本以为这句会回传『所有』infected? = true 的 turtle+ r( r/ H0 p0 G# q$ z6 ^
但看结果似乎不是这样。
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假设所有符合条件的有 5 笔
9 d3 i- s! O& A# y) R5 J' _1 R有时候回传 1 笔，有时回传 3 笔，是不固定的. B) l1 W: `+ t' g( \7 \
回头查语法定义2 c! U0 \' M$ R, y' o' V
with ( z- _% h" Z6 P+ P2 a7 p
agentset with [reporter]
; I& X# n& E& y' n5 ZTakes 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 U& `- h: ?6 T6 i
它只说回传 agents satisfying the given condition
& A( D5 }. u: a, J/ F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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( S2 w* `+ W9 d% |% j想确定一下; d: R7 E$ g5 b7 {
谢谢！
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楼主
发表于 2013-11-7 00:02:20
