▁d ' Al ene ▁Gul ch ▁by ▁an ▁Australian ▁out fit , ▁but ▁no ▁development ▁work ▁was ▁done . ▁Later , ▁John ▁Hir she y ▁and ▁El mer ▁Carl son ▁located ▁the ▁di ke ▁in ▁P t arm igan ▁Gul ch ▁about ▁a ▁mile ▁south ▁of ▁the ▁original ▁discovery ▁and ▁W . ▁A . ▁Log man ▁re located ▁the ▁di ke ▁on ▁Co eur ▁d ' A len o ▁Gul ch . ▁The ▁L ucky ▁St rike ▁mine , ▁managed ▁by ▁John ▁Hir she y , ▁reported ▁activity ▁in ▁ 1 9 3 1 . ▁ ▁References ▁ ▁Category : R ivers ▁of ▁the ▁Ken ai ▁Pen ins ula ▁Category : R ivers ▁of ▁Ken ai ▁Pen ins ula ▁Bor ough , ▁Al aska ▁Category : R ivers ▁of ▁Al aska <0x0A> </s> ▁H acker ' s ▁Del ight ▁is ▁a ▁software ▁algorithm ▁book ▁by ▁Henry ▁S . ▁Warren , ▁Jr . ▁and ▁published ▁by ▁Add ison - W es ley ▁Professional . ▁The ▁first ▁edition ▁was ▁released ▁in ▁ 2 0 0 2 , ▁and ▁the ▁second ▁in ▁ 2 0 1 3 . ▁It ▁discuss es ▁a ▁variety ▁of ▁programming ▁algorithms ▁for ▁common ▁tasks ▁involving ▁integer ▁types , ▁often ▁with ▁the ▁aim ▁of ▁performing ▁the ▁minimum ▁number ▁of ▁operations ▁or ▁replacing ▁slow ▁operations ▁by ▁faster ▁ones ▁( e . g ., ▁converting ▁a ▁divide ▁by ▁a ▁constant ▁into ▁a ▁multiply ▁by ▁another ▁constant ▁that ▁gives ▁the ▁same ▁result ). ▁ ▁The ▁second ▁edition ▁has ▁new ▁chap ters ▁on ▁cy clic ▁redund