|
|
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
" v5 Z1 o2 a1 n) v0 _6 o' V, n( B其中有一段如下
& q# |3 a) [0 i6 o+ E3 ?ask turtles with [ infected? = true ]
" N4 p. J- p9 g我原本以为这句会回传『所有』infected? = true 的 turtle0 c) v; j! r9 Z% x/ L9 l* j8 Z" \
但看结果似乎不是这样。+ V* \: r+ u+ m# X& R- m- }" x# X
2 L' `# ?! D6 k H# K# z; K( z2 D假设所有符合条件的有 5 笔7 P. e* m+ g6 h8 ~/ d3 b
有时候回传 1 笔,有时回传 3 笔,是不固定的9 ~. S) U5 }% [9 S1 z
回头查语法定义+ \" d! F- k$ p, l
with
0 x5 |; D8 L% S! n0 ragentset with [reporter]
# l2 J/ j$ e, z/ R/ ]5 U9 jTakes 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.
5 O. M1 P1 Q8 ~& m; @它只说回传 agents satisfying the given condition z/ A2 D4 ?# K4 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 ? : ]5 R2 r9 O9 t7 B4 A0 J
, D" J/ l* w3 j' ?2 u想确定一下
. m8 F! M" A9 Z2 g* y9 s谢谢!
4 B- T. H- y. d/ o |
|