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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
* P7 J4 X: i H! L5 ^* e其中有一段如下0 b, ?2 S8 d+ j+ L6 m2 ~ Z
ask turtles with [ infected? = true ] & @; F% l# F0 z# L- ~
我原本以为这句会回传『所有』infected? = true 的 turtle( V$ W; ?% ?, |2 \
但看结果似乎不是这样。, X% n# X7 j" H- Q: s
! A+ \9 @5 i+ u) B2 T假设所有符合条件的有 5 笔
" f. y6 Z% ~9 p/ I/ x) E有时候回传 1 笔,有时回传 3 笔,是不固定的' a( l q; R8 ?7 ~# W
回头查语法定义# N% X9 q" F1 ]$ R" j7 ~- [
with
5 p. j3 C. A% qagentset with [reporter]9 E1 }% U$ B8 {. S5 z
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.
2 t6 i3 g7 J3 k它只说回传 agents satisfying the given condition
9 W4 Y& G. s( o- Q5 h* U z- d$ J: B) a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 ? / T+ _" h# [7 b& @1 S: C
X8 @0 |+ J5 i2 s& e: M想确定一下
/ Q( @; V4 o1 c% y谢谢!
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