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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
: t: L( @, B& Q L其中有一段如下/ e& S" v. @6 c( v& Q' e
ask turtles with [ infected? = true ] - t, u) r. V% I% x( f' @
我原本以为这句会回传『所有』infected? = true 的 turtle
7 h1 s) J& U$ `. j但看结果似乎不是这样。- L/ ]9 ?( `" d; a8 E
: T" z8 I9 B- Z$ y假设所有符合条件的有 5 笔- U5 X( G' N- B+ x3 Z
有时候回传 1 笔,有时回传 3 笔,是不固定的! [9 N( O {! M- K
回头查语法定义
1 x( H E& i6 a. U4 b' P' Gwith
8 `& g9 p8 p; M2 |8 P) t7 Y& c9 gagentset with [reporter]3 u5 X7 w' n( C
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.
! K$ }2 m( i% d5 | M1 E Y它只说回传 agents satisfying the given condition9 A4 E8 R( i( Q* ^0 l6 u0 q6 v1 p3 X
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 ? 4 U( a5 Q6 r# b0 r7 h4 D
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想确定一下4 w: w' x0 t2 [- Y0 X$ |
谢谢!5 C. z: E/ \; K- N# ^
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