|
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
n- A/ E9 E4 q9 H1 e H其中有一段如下! W) t4 e3 I' U2 W$ Y
ask turtles with [ infected? = true ]
8 N1 r' ?% v* r" z: W+ Z我原本以为这句会回传『所有』infected? = true 的 turtle
% r0 n, S4 R% Q! e# B但看结果似乎不是这样。& }' {2 R. _" L0 J' h
7 D" T9 ]( @7 l4 P' Q( v1 Y7 b1 X假设所有符合条件的有 5 笔* W: m5 O: Y2 U: o
有时候回传 1 笔,有时回传 3 笔,是不固定的
6 l( ?5 q* W1 N# Z回头查语法定义
! c5 `7 q5 M2 e( e/ }with ' A. N2 u6 e2 }
agentset with [reporter] V1 Y* n J1 y4 n( U& 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./ W- d+ g) {* D3 \
它只说回传 agents satisfying the given condition
8 B8 X: ]+ F9 |' i4 l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 ?
7 S( S0 r8 M& m& t- k. i6 C! q" K2 h/ N# o( z
想确定一下" E4 S0 b# a. Z3 I, ]
谢谢!6 ?7 Y4 L$ g0 R9 \5 \& I
|
|