|
|
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
) A5 g" T. A3 h! N+ d( l其中有一段如下( ?" a/ Q) g8 s6 U/ u! u
ask turtles with [ infected? = true ]
1 f! p% H$ a4 X# a% J我原本以为这句会回传『所有』infected? = true 的 turtle4 f! g. _! s% c) T
但看结果似乎不是这样。: I' D) N2 o( L3 d2 @0 g+ B
9 @( D1 V; w5 e& ^) ?& a
假设所有符合条件的有 5 笔
! v8 L' `- d. g- ]3 y& d6 R7 c有时候回传 1 笔，有时回传 3 笔，是不固定的: n4 [( ~2 [" C6 u
回头查语法定义
1 P* y. l' b8 z9 awith
9 o2 U, d+ Q9 W9 Jagentset with [reporter]
' Y' ~, r& O6 l) j. 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.
/ N7 V- R6 \# X$ J, s它只说回传 agents satisfying the given condition0 [, n' F0 s3 H! {6 H
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 ? / `6 r: [1 I8 W, Z U
) F4 U# p8 ^5 b, X想确定一下
# x2 B! t& v3 c. `谢谢！
4 n* b+ `3 {. j4 p3 c* b |
|
[复制链接]
楼主
发表于 2013-11-7 00:02:20
