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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
" c; E1 s6 G' ^$ _/ h其中有一段如下* }0 C0 u* V4 m+ h1 |
ask turtles with [ infected? = true ]
0 U+ ] ^2 Z6 v( c, Q% l% b我原本以为这句会回传『所有』infected? = true 的 turtle
: U0 x3 R: `6 |5 t& H, A% v( C但看结果似乎不是这样。 O+ t. h9 b. A% t4 }
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假设所有符合条件的有 5 笔
) L: K* h' h1 W8 S0 C# x! l8 @" P+ |有时候回传 1 笔,有时回传 3 笔,是不固定的
/ H7 ^# n2 k- l5 C4 n3 i0 |$ u* V回头查语法定义5 i" g4 M6 P/ |' h6 q7 Q
with
! j8 H+ |& e9 wagentset with [reporter]! ~ A5 J \& A9 E. ^' L
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.
5 A' x7 K1 @# e它只说回传 agents satisfying the given condition. C6 h/ v8 ^( ?2 b
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 ? : s% t/ `, b1 R. Z& p3 g' C/ Y
, e( Z( d. h* _/ Q( Q/ N# R想确定一下/ c' u9 p$ t# D! C5 B
谢谢!
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