RosettaCodeData/Task/Stable-marriage-problem/11l/stable-marriage-problem.11l
2023-07-01 13:44:08 -04:00

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V guyprefers = [abe = [abi, eve, cath, ivy, jan, dee, fay, bea, hope, gay],
bob = [cath, hope, abi, dee, eve, fay, bea, jan, ivy, gay],
col = [hope, eve, abi, dee, bea, fay, ivy, gay, cath, jan],
dan = [ivy, fay, dee, gay, hope, eve, jan, bea, cath, abi],
ed = [jan, dee, bea, cath, fay, eve, abi, ivy, hope, gay],
fred= [bea, abi, dee, gay, eve, ivy, cath, jan, hope, fay],
gav = [gay, eve, ivy, bea, cath, abi, dee, hope, jan, fay],
hal = [abi, eve, hope, fay, ivy, cath, jan, bea, gay, dee],
ian = [hope, cath, dee, gay, bea, abi, fay, ivy, jan, eve],
jon = [abi, fay, jan, gay, eve, bea, dee, cath, ivy, hope]]
V galprefers = [abi = [bob, fred, jon, gav, ian, abe, dan, ed, col, hal],
bea = [bob, abe, col, fred, gav, dan, ian, ed, jon, hal],
cath= [fred, bob, ed, gav, hal, col, ian, abe, dan, jon],
dee = [fred, jon, col, abe, ian, hal, gav, dan, bob, ed],
eve = [jon, hal, fred, dan, abe, gav, col, ed, ian, bob],
fay = [bob, abe, ed, ian, jon, dan, fred, gav, col, hal],
gay = [jon, gav, hal, fred, bob, abe, col, ed, dan, ian],
hope= [gav, jon, bob, abe, ian, dan, hal, ed, col, fred],
ivy = [ian, col, hal, gav, fred, bob, abe, ed, jon, dan],
jan = [ed, hal, gav, abe, bob, jon, col, ian, fred, dan]]
V guys = sorted(guyprefers.keys())
V gals = sorted(galprefers.keys())
F check(engaged)
V inverseengaged = Dict(engaged.map((k, v) -> (v, k)))
L(she, he) engaged
V shelikes = :galprefers[she]
V shelikesbetter = shelikes[0 .< shelikes.index(he)]
V helikes = :guyprefers[he]
V helikesbetter = helikes[0 .< helikes.index(she)]
L(guy) shelikesbetter
V guysgirl = inverseengaged[guy]
V guylikes = :guyprefers[guy]
I guylikes.index(guysgirl) > guylikes.index(she)
print(#. and #. like each other better than their present partners: #. and #., respectively.format(she, guy, he, guysgirl))
R 0B
L(gal) helikesbetter
V girlsguy = engaged[gal]
V gallikes = :galprefers[gal]
I gallikes.index(girlsguy) > gallikes.index(he)
print(#. and #. like each other better than their present partners: #. and #., respectively.format(he, gal, she, girlsguy))
R 0B
R 1B
F matchmaker()
V guysfree = copy(:guys)
[String = String] engaged
V guyprefers2 = copy(:guyprefers)
V galprefers2 = copy(:galprefers)
L !guysfree.empty
V guy = guysfree.pop(0)
V& guyslist = guyprefers2[guy]
V gal = guyslist.pop(0)
V fiance = engaged.get(gal, )
I fiance ==
engaged[gal] = guy
print( #. and #..format(guy, gal))
E
V galslist = galprefers2[gal]
I galslist.index(fiance) > galslist.index(guy)
engaged[gal] = guy
print( #. dumped #. for #..format(gal, fiance, guy))
I !guyprefers2[fiance].empty
guysfree.append(fiance)
E
I !guyslist.empty
guysfree.append(guy)
R engaged
print("\nEngagements:")
V engaged = matchmaker()
print("\nCouples:")
print( sorted(engaged.items()).map((couple_key, couple_val) -> #. is engaged to #..format(couple_key, couple_val)).join(",\n "))
print()
print(I check(engaged) {Engagement stability check PASSED} E Engagement stability check FAILED)
print("\n\nSwapping two fiances to introduce an error")
swap(&engaged[gals[0]], &engaged[gals[1]])
L(gal) gals[0.<2]
print( #. is now engaged to #..format(gal, engaged[gal]))
print()
print(I check(engaged) {Engagement stability check PASSED} E Engagement stability check FAILED)