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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
- K+ p+ Y! m0 b" o9 O' W其中有一段如下. q8 D9 O: o3 E
ask turtles with [ infected? = true ]
2 {: R" u8 Y% S- @3 Q# u我原本以为这句会回传『所有』infected? = true 的 turtle% f/ x- g4 X9 t3 x/ w5 V) C! l0 v
但看结果似乎不是这样。- G) t; _' z! p9 P4 [, S7 ]4 E
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假设所有符合条件的有 5 笔
7 b5 T0 m# @( \& c. P; \6 r; P有时候回传 1 笔，有时回传 3 笔，是不固定的& J" N; B) L/ `- p H
回头查语法定义% Q+ k7 x! l- d6 ~ ?' \
with
9 p: P! c7 X6 |$ nagentset with [reporter]
' n h: G0 |9 VTakes 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.
4 ?, e& r3 e A8 j它只说回传 agents satisfying the given condition
# d* b" X1 ~) @4 n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 ? . B0 e8 W3 I! s, o. c* B
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想确定一下' F8 K, x& `3 I7 S5 X3 e* l: r& A2 S
谢谢！. R9 X3 {7 ~5 ]2 V) p: q6 n6 B
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楼主
发表于 2013-11-7 00:02:20
