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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2 F( S8 E1 K& K6 e1 ] p
其中有一段如下6 Y: B' ?. H) X# N: ]" l7 \% P& ^
ask turtles with [ infected? = true ]
9 z& o9 z ~9 Q8 x9 |我原本以为这句会回传『所有』infected? = true 的 turtle
( o; m3 I. X4 S8 R但看结果似乎不是这样。
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, I7 F, U+ z* a$ c6 i, V+ j假设所有符合条件的有 5 笔& Z& U% Q* a: P/ ^! I! e
有时候回传 1 笔,有时回传 3 笔,是不固定的
a" ~. @, x: s( H2 X( |+ e1 S) y回头查语法定义& m$ J/ s9 e, N( v/ B
with : A# h% ?" x1 F+ C% k6 t/ o
agentset with [reporter] _% E- }$ k- H% U9 N" C) t: ]
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.
* a6 A B: N8 K( H j- v% e它只说回传 agents satisfying the given condition6 r' n+ B9 E b5 M" P& {& h0 I( w R
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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想确定一下
% {; {# k, N+ `7 r ^/ X; r谢谢!4 n- A/ {+ q. X H# g+ y
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