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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
2 i0 c$ h8 U" z, `# U其中有一段如下
* _* z0 H2 Z: |" O% Z$ rask turtles with [ infected? = true ] / u1 R8 A, B: U2 z2 j4 g
我原本以为这句会回传『所有』infected? = true 的 turtle
$ \# E' a" P( C7 d1 ]4 X7 J6 a但看结果似乎不是这样。, y2 i; \2 b8 u
7 `) F" e5 ^! K9 F) p假设所有符合条件的有 5 笔+ r, c" e. I8 K1 s/ c, w* _
有时候回传 1 笔，有时回传 3 笔，是不固定的$ l, s, l; q& p4 w, v, ^
回头查语法定义
" ? Z- O0 ]* }, P" bwith
3 m- K5 d/ ^, `% r. X1 magentset with [reporter]
' e) |: V9 c6 u4 V" L% fTakes 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.
2 O8 i3 \% x) |8 L+ r它只说回传 agents satisfying the given condition) }; T& B/ k8 n! a" T+ O/ Z4 R
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 ? 0 A) D! r# V) `- m; j8 }6 @
! D6 t: }1 ~/ s, C% G1 Z
想确定一下0 ^/ K( G9 }, Y# [0 u
谢谢！$ n& |7 A2 u" ~6 s) m- \! M# f( j
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楼主
发表于 2013-11-7 00:02:20
