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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+ k) R, k' I! C' Y% Q+ @
其中有一段如下
9 \% n1 c: Q( F @3 S5 [$ Xask turtles with [ infected? = true ] # M9 y. {, a' ~4 O" C' U! b
我原本以为这句会回传『所有』infected? = true 的 turtle% l$ k5 [( E6 c/ q: T5 X* T1 b8 `
但看结果似乎不是这样。. Y1 B: W% Y0 Q+ v% W# }, r6 q5 e8 d
$ H0 f7 B, U( E7 a( \假设所有符合条件的有 5 笔( N8 s1 a3 d* a% E, G) `
有时候回传 1 笔,有时回传 3 笔,是不固定的6 s+ X, E( `4 D* b/ |
回头查语法定义
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5 A9 M5 g5 W2 @3 h3 a9 v! sagentset with [reporter]* f) K# D; M+ x- M" f7 \
Takes 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.
( \. E+ {. r, s它只说回传 agents satisfying the given condition/ D m2 h5 G1 ^! Y" {9 X0 {
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 ?
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; o& A! t! f1 G6 z7 H, [, J想确定一下
9 b7 k f! h5 n/ e: ]谢谢!' H9 I! p" F& e3 d5 E- ~1 ^
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