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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) Q; o2 t! y W3 [: {+ s& x7 U; W) M
其中有一段如下0 `5 C* e$ d% {. S, f) e- _; w
ask turtles with [ infected? = true ]
, ~5 y- ~+ j; z. `7 w) ?( r0 }5 i我原本以为这句会回传『所有』infected? = true 的 turtle
+ |. |& x+ |6 ^' P- H5 t) ^4 T# Z但看结果似乎不是这样。# o7 i$ l( Y! [) O, f
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假设所有符合条件的有 5 笔
1 s4 k7 v+ U; x- e% z4 ~! e( h有时候回传 1 笔,有时回传 3 笔,是不固定的; R% f! V! N/ T2 O" B* ?
回头查语法定义
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agentset with [reporter]
9 o5 s4 x. J& W3 _2 xTakes 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.
! A! g$ R' o- h/ X1 O它只说回传 agents satisfying the given condition
: O/ e. {/ f, `% R8 `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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# i9 h& _1 i( ~% O4 K4 ?/ }想确定一下, ?0 F4 G* c r% \
谢谢!
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