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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
8 f9 N) r& _5 l其中有一段如下- t& c; ~, y/ l' Y1 {0 K# Q
ask turtles with [ infected? = true ]
. |) a6 I# C& z$ `0 l1 e; |6 u我原本以为这句会回传『所有』infected? = true 的 turtle
9 L! N( i: R. x, x) x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) R ?9 @( I% Z2 e
有时候回传 1 笔,有时回传 3 笔,是不固定的
" a3 p5 o2 g# |' w+ E, M回头查语法定义, k) |/ x# W6 v
with
+ H* F1 r; J( A: [$ n0 Iagentset with [reporter]
. S+ Y# X: Z7 ^5 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.
- v9 e5 Q" k* s! u% k它只说回传 agents satisfying the given condition
* N# f. b0 ~2 ]: D2 u2 b M2 {: U, d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 ? 2 s1 G4 A8 E Y' |
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想确定一下
3 C" ^$ j; c- Q) }& I5 _谢谢!
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