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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
) ], f1 Y* l3 Z4 U其中有一段如下4 n$ v2 s9 s) ?5 S
ask turtles with [ infected? = true ] 7 i- B! p$ \6 g* y$ t C) @
我原本以为这句会回传『所有』infected? = true 的 turtle/ y( m0 K8 p2 ]* U" E
但看结果似乎不是这样。! R* ^4 I7 E1 P
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假设所有符合条件的有 5 笔
H5 T' S- d1 }# h1 B* P" }5 E. p有时候回传 1 笔,有时回传 3 笔,是不固定的# p! m% {6 h+ R5 J6 p
回头查语法定义- h2 z* B0 R+ L1 {4 L# R X& f& `' d- R4 y
with
7 U+ X5 w5 i" _9 L: r/ Oagentset with [reporter]7 y q4 Z- y% a/ b0 R
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.
9 |$ g/ o, W0 E( U& _它只说回传 agents satisfying the given condition' U6 |! h. T5 R5 E: g Z1 @3 t: s
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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3 n2 {; [7 T- M7 N9 ^& x* A* A5 v想确定一下" C$ A; E* j9 U3 ?
谢谢!2 C8 H% }, P) ]! L3 Z1 J
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