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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
4 G$ a0 C1 M2 N/ r% p其中有一段如下$ j9 H0 o4 _5 t0 `
ask turtles with [ infected? = true ] h; P' X' {! S' A' p
我原本以为这句会回传『所有』infected? = true 的 turtle/ y( H8 S) B) y
但看结果似乎不是这样。& [& b1 J- J3 s: O1 {; y7 i! L
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假设所有符合条件的有 5 笔
" h# a- N; b) e7 u5 s& L, Y$ q8 [有时候回传 1 笔,有时回传 3 笔,是不固定的
2 ^5 U' J- h* _回头查语法定义
4 l- Y9 r8 }7 [4 K) I! c0 J* V% H% Bwith
( M% l3 T! g* R* Gagentset with [reporter]
3 B! r$ B3 a) y) A4 z( Q; ITakes 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.
/ V6 s5 e% q, @; u# j* F它只说回传 agents satisfying the given condition! x& K0 |$ E; W3 A0 |- S( b0 S
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 ? . Z; Q3 f, m8 b/ ]- g' u' P
! ]+ v& B1 }( l0 f4 ]0 c想确定一下- g4 d' R h- m G
谢谢!
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