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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
6 G+ S# _0 E4 H% s0 o9 P其中有一段如下/ v' {; ~' y# Y- e6 N( u
ask turtles with [ infected? = true ] 9 m0 C' I, A) G ?
我原本以为这句会回传『所有』infected? = true 的 turtle
1 X/ `7 f3 U4 S/ X' o' E/ @) ~$ }但看结果似乎不是这样。
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假设所有符合条件的有 5 笔$ {; Z0 ^" [+ F
有时候回传 1 笔,有时回传 3 笔,是不固定的
W. R& i0 Z, C5 [9 A' ~, ]) a回头查语法定义) y- t$ }$ x0 x' }3 Y$ u% t" ^$ L
with
' h1 o' v0 c1 Magentset with [reporter]
& R6 W, z+ m0 S3 r5 a. K, [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.
1 t8 y; O+ Z" w它只说回传 agents satisfying the given condition: Z( D5 B R* e+ `
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 ?
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想确定一下
" P0 V2 H0 B# \* ]谢谢!
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