Gotanda.pm #1 - Speaker Deck

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1ZUIPO࢖͍͔Βݟͨ1FSM (PUBOEBQN  !NJIZBFSV

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ࣗݾ঺հ w ϛώϟΤϧ!NJIZBFSV w 1ZUIPO 0CKFDUJWF$ śƂŠƃٙ࿭   1FSM w ΏͱΓ7JNNFS w ζϰΟζμʔઓಆһ

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Α͘--ͬͯҰׅΓʹ͞ΕΔ͠  1ZUIPOΘ͔Ε͹༨༟Ͱ͠ΐ

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ͭ1FSM

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sub say_hello { my $name = shift; ! print "Hello, $name\n"; }

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͋ΕͬʁҾ਺͸ʁ TIJGUͬͯͳΜ΍ͶΜ

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sub sum_numbers { my $sum; for (@_) { $sum += $_; } ! return $sum; }

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Μͬʁ

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$_ @_

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@_ͱ͔$_ͱ͔Ͳ͔͜ΒདྷͨΜ΍ ͳΜ͡Ό͍͜ΓΌʔʂ

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࠷ॳʹࢥͬͨෆຬ w มͳه߸ଟͯ͘ҙຯෆ໌ w ίϯςΩετʁʁʁ w ຖճNZͬͯॻ͘ͷ໘౗͍͘͞ w ਅِ஋Σʜʜ w ϦϑΝϨϯεपΓ͕Θ͔Γʹ͍͘ w Ҿ਺Ϧετ͸Ͳ͜ʂʁ ʜଞʹ΋͔͋ͬͨ΋͚ͩͲ๨Εͨ͆

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มͳه߸ଟͯ͘ҙຯෆ໌ $_ @_ 1ZUIPOͰ͸͜ΜͳʹढจΊ͍ͨม਺͸ग़ͯ͜ͳ͔ͬͨʂ $! $@ ͨͿΜʜ $. $/

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͜Μ͖ͯ͢ͱʁʁʁ @a = (0, 1, 2) Ϧετ  ίϯςΩετ 0, 1, 2 εΧϥʔ  ίϯςΩετ 3 ཁૉ਺͕஌Γ͔ͨͬͨΒlen()ͱ͔໌ࣔతʹॻ͖͍ͨ ৔ॴʹΑͬͯҙຯ͢Δͱ͜Ζ͕ҧ͏ʜʜͩͱʜʜ

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NZࢯ w --ͬͯݴΘΕΔ͘Β͍ͩ͠ɺϥΠτʹॻ͖͍ͨ w 1ZUIPOͰ͸म০ࢠͳ͠ͰϩʔΧϧม਺

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ਅِ஋Σʜʜ w ਅِΛද͢໌֬ͳ΍͕ͭͳ͍ w 5SVF 'BMTFཉ͍ͬ͢͠ w ίϯςΩετ΋૬·ͬͯѻ͍͕೉͍͠

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ϦϑΝϨϯε w ࠷ॳɺ ͱ<>͸ಉͩ͡ͱࢥ͍ͬͯͨ w εΧϥʔม਺ͳͷʹ഑ྻʂ w 1ZUIPOͰ͸഑ྻͱݴͬͨΒ͜Ε͚ͩ @a = (0, 1, 2); $ref = \@a; $ref = [0, 1, 2]; a = [0, 1, 2]

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ͳΜͰҾ਺Ϧετͳ͍ͷ w !@Λड͚ͱΔ͚Ͳ࢖͍ํࣗ༝͗͢ w 1ZUIPOͩͱؔ਺ͷσϑΥϧτ஋ΛઃఆͰ͖Δ͠  ΩʔϫʔυͰݺͿ͜ͱ΋ग़དྷΔʂ my ($a, $b) = @_; my $a = shift; my %args = @_;

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ͪͳΈʹ w σϑΥϧτ஋Λ࢖ͬͨݺͼग़͠ w ී௨ͷݺͼग़͠ w Ωʔϫʔυݺͼग़͠ def hello(name = 'mihyaeru'): print 'Hello, %s' % name ! hello() hello('dareka') hello(name = 'anata')

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ෆຬΛ๊͖ͭͭ  ਺ϲ݄͕ܦա

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࠷ॳʹࢥͬͨෆຬ w มͳه߸ଟͯ͘ҙຯෆ໌ w ίϯςΩετʁʁʁ w ຖճNZͬͯॻ͘ͷ໘౗͍͘͞ w ਅِ஋Σʜʜ w ϦϑΝϨϯεपΓ͕Θ͔Γʹ͍͘ w Ҿ਺Ϧετ͸Ͳ͜ʂʁ

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࠷ॳʹࢥͬͨෆຬࠓ͸ w มͳه߸ଟͯ͘ҙຯෆ໌ w ίϯςΩετʁʁʁ w ຖճNZͬͯॻ͘ͷ໘౗͍͘͞ w ਅِ஋Σʜʜ w ϦϑΝϨϯεपΓ͕Θ͔Γʹ͍͘ w Ҿ਺Ϧετ͸Ͳ͜ʂʁ ׳ΕΕ͹ා͘ͳ͍ʂ ׳ΕΕ͹ʢ͈́ ॻ͍ͨํ͕҆৺ײ͋Δ ਅِ஋Σʜʜ Ҿ਺ʹ໊લ͸ͳ͘୯ͳΔϦετ ະͩʹͬ͘͠Γ͜ͳ͍

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ෆຬ͹͔Γݴͬͯ΋  ΞϨͳͷͰ

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ؾʹೖ͍ͬͯΔͱ͜Ζ w ແ໊ؔ਺͕࢖͍΍͍͢ w NBQͱ͔HSFQͷײ͕͡޷͖ w ϝιουݺͼग़࣌͠ͷୈҰҾ਺ʹTFMG͕ೖͬͯ͘Δ

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ແ໊ؔ਺͕࢖͍΍͍͢ w 1ZUIPOʹ΋MBNCEBͱ͍͏ແ໊ؔ਺Λ࡞Δه๏ΞϦ w ࣜΛ͔ͭ͠ೖΕΒΕͳ͍͔Β਺จͷॲཧ͸μϝ hoge_call(sub { # do # something # hoge }); def temp(): # do # something # hoge ! hoge_call(temp) 1FSM 1ZUIPO

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NBQͱ͔HSFQ͕ྑ͍ײ͡ Ҿ਺Λح਺͚ͩʹߜΓࠐΜͰɺɺɺ  ৐ͨ͠஋ͷ഑ྻʹ͢Δɺɺɺ  తͳॲཧ my @squared_odds = map { $_ * $_ } grep { $_ % 2 == 1 } @_;

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1ZUIPOͩͱ [x * x for x in nums if x % 2 == 1]

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1ZUIPOͩͱ [x * x for x in nums if x % 2 == 1] NBQʹ૬౰ HSFQʹ૬౰

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Ϧετ಺แදه [x * x for x in X if x % 2 == 1] {x2 | x ∈ X, x % 2 = 1} ਺ֶͷू߹ʹ͓͚Δ಺แతදه͕ݩʹͳ͍ͬͯΔ

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ϝιουͷTFMG 1ZUIPOΛኲኵͱͤͯ͞਌ۙײ͋Γ sub method { my ($self, $hoge) = @_; } def method(self, hoge): pass

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౜ಥ͚ͩͲ  ͦΜͳ͜ΜͳͰ

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·ͱΊ w 1FSM࢖͍࢝Ίͯ਺ϲ݄ͷਓͷײ૝ w ֖Λ͚͋ͯΈΔͱṖ͍ͱ͜Ζ͕ଟʑ w ͋Δఔ౓͸׳ΕͰͳΜͱ͔ͳΔʂ w 1FSMා͔͚ͬͨͲࠓͰ͸޷͖ͳͱ͜Ζ΋͋Δʂʂ