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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
; ~4 w* ~& I$ [0 E( _- G; e其中有一段如下& x& K% L- m+ ~8 F+ i4 d
ask turtles with [ infected? = true ]
8 e" D2 t. O8 [& r& ~ V我原本以为这句会回传『所有』infected? = true 的 turtle' B5 C" t0 n0 Y. X
但看结果似乎不是这样。
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& ?% B6 E" l1 Y: b( X/ P0 r9 a& G假设所有符合条件的有 5 笔! C+ l( n! X k2 X4 z3 R
有时候回传 1 笔,有时回传 3 笔,是不固定的
/ n7 E( a% B4 j. U( C6 W* k* I回头查语法定义
% c3 a' Z, B) A, s3 E& d* I2 G4 hwith # R8 h# l. d j5 E( {
agentset with [reporter]
, ~9 E* D W5 m) c. aTakes 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.
C3 f- B) A g它只说回传 agents satisfying the given condition
2 y3 F/ T4 g$ \/ U; Q/ d6 u) w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 ? ' b2 W+ w0 d) m) v0 [ _
' u' t9 C9 Q$ T, U4 G- N5 [想确定一下2 S( G9 f4 | E7 \( S
谢谢!" D, c$ b8 n9 b( b1 m" y
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