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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
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ask turtles with [ infected? = true ] % r) N7 v8 z- k) @
我原本以为这句会回传『所有』infected? = true 的 turtle' i5 b6 G" N1 }4 I
但看结果似乎不是这样。% k/ ]' D" a6 p0 O! ~5 [7 V2 H
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假设所有符合条件的有 5 笔% u" K0 R. r; P& U& s7 u1 @% ?
有时候回传 1 笔,有时回传 3 笔,是不固定的4 c- R" W+ Q% |
回头查语法定义
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agentset with [reporter]+ q, w9 c6 X- G1 x
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.- B* ^3 X1 B4 r' f, i+ P! v# X
它只说回传 agents satisfying the given condition# D3 n8 m* n% ^$ M+ 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 ?
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想确定一下
' w& A1 b; y- ?谢谢!# y, y* P9 b3 @1 \% `8 ^
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