|
|
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
* I: z8 M5 B; z2 Z# g; f: ~其中有一段如下( \3 |: ^4 m* z/ u# E6 J% Q
ask turtles with [ infected? = true ] 0 r' [. E$ w8 g8 U4 S
我原本以为这句会回传『所有』infected? = true 的 turtle
! \% ^$ }% ^0 m$ i但看结果似乎不是这样。( a' h' a4 C I
' t; \" ~% J7 Z/ b3 g2 J
假设所有符合条件的有 5 笔0 X7 e' K6 E5 H# @- g* A6 K
有时候回传 1 笔,有时回传 3 笔,是不固定的% y& S9 U, w& n; X
回头查语法定义
5 f o2 o* x |- G% Hwith
5 _0 y2 x3 `) o* j& {agentset with [reporter]' u8 W$ V, I2 @/ w/ V
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.3 L) H6 w& c* l7 g- [* B1 S
它只说回传 agents satisfying the given condition
. r0 Q i+ P- o) 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 ? 1 v! o; Z/ @4 w: N( e
, T3 R' } o, c- E# E6 ?
想确定一下& t! ?( m( j. t" {7 w& @
谢谢!
* f0 k" a9 S b2 s& r |
|