|
|
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
( N6 g6 e/ p8 d9 C3 E" T0 P* X其中有一段如下
% [) p! ]9 n7 M( |$ }$ aask turtles with [ infected? = true ] / s. D. ?& r* G4 D$ B* i
我原本以为这句会回传『所有』infected? = true 的 turtle+ b! _2 y8 k8 T" c, l: y8 D0 }
但看结果似乎不是这样。, O) G/ t; K3 i* G
& K' q: a4 w: S3 `$ s/ K: g# `" Y* T
假设所有符合条件的有 5 笔+ s3 A' Z) m' }+ d( b3 _% R
有时候回传 1 笔,有时回传 3 笔,是不固定的
- e' i0 X4 h3 l3 @& q6 M- ^回头查语法定义& b& R* P, c5 ?
with
! }: K. I( A* B1 Q/ z; W/ Pagentset with [reporter]
6 b( \* L5 X4 q- V2 QTakes 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+ b6 K) i( A. C, I它只说回传 agents satisfying the given condition
# `" T. y/ b* V6 K( {+ }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 ?
! ^8 A6 {0 X$ ]3 c, q
# r* k4 [, ?! o! @" ~, c想确定一下" L- H' o+ c, { E" Y6 ^8 B- s: l
谢谢!0 [" W5 v8 e* V% p
|
|