Commentary of the LINE's Coding Test

Transcript

1. LINE > Kazuhiro Osawa / LINE

   Service Development Department1 2021 ( )

2. > LINE > > /

   Agenda

3. #01 LINE

4. 2190 300 2020/03/07

5. > 6/$# $)% •Re-Challenge', > $# &$ 6/+ !#*5 >

   94$$# " $18 > #$7 * LINE0(.32-

6. > >

7. https://www.youtube.com/watch?v=kpG3QSHCzPY https://www.slideshare.net/linecorp/line-80520817

8. # !&' % )" (

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9. > 81$# $*% •Re-Challenge(- > $# '$ 81, !#+7 >

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11. #02

12. > LINE%!;43+: 8* > $#"7 > 95&2'-6 >

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15. > 4 • *2,-)% 1,.( 3#3 +

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16. > ,*/(#5& > - +.$ +) .4 >

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17. > $. , > ()+

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18. > &/ *,% > +3 (" ) > '!-

    4 . # ↑ 12/5 → +0$

19. #03

20. > )C#= *( •'%B •B!1., •-<)C)C&2= OK > >8+0

    •46$ ?:8+9/ •=;3@233@ 7"5A

21. > → >-%>5&* 7 21 # +$)&*.6 ? >

    ;" $- A6<@/9 80 '-*),B =3!(-$)* 4.6:?

22. > &2 3.9,- > TDD8$ 0/7 > 4TDD(6 '

    > 1+%#%%5!"%) :*

23. > &* ! + > !$& !( #.+

    > !,4/'% > (OOP+ ) 21)0 21 "-3

24. > %).*6!%3 > % *6 5',0*6 > % +.*6 #%*6

    "$%2( > 2( 15',01 $/8 :& > 4- %9 4- 7

25. > :7Web3!* &$2,FDQ > M=)%+#2%12"0? 12"0) %+<R DE

    •'-2+/0 QO Q > 9N6KDH!.2G4>5P7CK > IJL@ S8B)%+;A $(

26. > LINE+32bQD48T • 75\ (30ZY[; ! > K9dH=-)/'3)"?`^ "RM •

    X-)/'3)^ D4 K9dB • 0O"_ 1<-)/^ • 6L^J YUaC*$2#%/ V > :AdIcS • HGEW"F • .1,&@P 1&N> ] D4

27. #04

29. 1

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31. > 1>815I'EDKBH • 2>:)J% .>;0 DK6 1>:<ADK7 • DK,9

    $5F*"C 23 (G@ > 815I245I-5A'E&99 #! •235'E 34I'E =955I ?B +/ $

32. Test case

33. > ';H GI'(6:hh:mm:ss.fff<SPACE>xx.f<LF>')-8# )$! • hh00-99A7 > @C > +C;HJ)!

    > +C45?F &) > 1C>4,()"GI0.0-80 > 2C<= ) > 2.ECGI0.0%)!'; > 15C5*C-3/D &)9B

34. > $.400"%4 > 57:@*,9 0*-=%4 > 2:@(57;:@1000m10200m).: 400m40"%4

    > >:@(57;:@10200m ).: 350m40"%4 > 10km/h !<8657.?453940"%4 > -=%4. .?+'&%4A -1 ( %4 • /).(AM0.AM6.)30%( • .?(AM6.AM9.30# or PM18.AM0.)50%( -=74

35. ! 1000m 10200m 920 10900m

    80 400 : 1400

36. > =+hh:mm:ss.fffmsec2: > MS10 @/6;'BH (BC) > msec&-

    =RA37!#7*4 " 5I > .F <Pmsec&- =R7 ,1<PG9 <P"#.F'B> > )$OK.F 'B> > LHMS.F 'B>DMS/QMS0( < P.F 'B> > %NLH*4'B>%NLH=R.F 'B>45 E %N<P.F 'B> JF'B?N5IT8

37. > 4ALR "1*1!1#&#(O > HGMF NQ •B7<?DCFI=2M $

    ruby -e 'puts 0.7 + 0.1' 0.7999999999999999 > ',% 6E5 > ;J, •&#("1) @:3 > 8HKF'1$P9 $/( +. -0(

38. > 27?D,: *E6<.; > 6< A'B0A+3> > ,C=/(

    %"1 > 8&-!# 2745)$ %! 279@*E<

42. Thank you!