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CS 207 Practice Final

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C S C 2 0 7 (1 7 fa ) - P r o b le m Practie F in a l 1 S p e a k to P ag e 2 o f 20 M e e s F ill ìn th e o p e r a t io n s o v e r th o s e d a t a s t r u c t u r b la n k s in th e ta b le w ith th e a v e r a e c a s e tim e c o m p le x i ty o f e a c h o f th e s e c o m b in a ti o n s If a t im e g Ą t a te in c o m p le x ity h a s c a v e a t e th e n ın tim e is a m o r tiz e d o r th e s t r u c t u r e r e q u ir e s b a la n c g B e lo w is a ta b le o f v a r io u s d a t a s tr u c t u r e s a n d . . . s o in y o u r a n s w e Ľ n o t b e fille d in . En g . , tr ie s th a t a r e fille d r ra (S ln B in H H 呷 ash g a r M l y y (t o L is t y - ) L in p e n tr i e s a n d sh o u ld k e d ( L is t en d (a t i n ) d e x c o n t a i n ß r e m o v e t g e i (e le m ) (e le m e rı d ) en t u ) e n t u ) ■ S e a rc h T r e e a ic a te ĵ n v a lid . a d d A (ı) in d a b la c k b o x w i th (Jj , e . , pu t (k . Ţ )) (i . Ee . , p e e k (o n) (i Ee . . , p o H (o n) ı团I \ Scanned by CamScanner C S C 2 0 7 (1 7 fa ) P - Fo r e a ch o f th e fo l lo w (1 ) H an th e n th a t f ie l d (2 ) N in s t a te m g j - s h o u ld s ta t ic m b e m en ķ p p r iv a t e n e le m fr o m b je c ts ' o th e i o (o f a rra is a n y a lin k ed (5 ) S U b ty p e p p r o p ń a te s t r u c h ır e w ・ d iffe r e n t t e y p ) , e m b e r s d e c la r e d in s id e iķ c o n ta in in Đ Đ g o l y m o T (6 ) T h e b e s t« a s e r m (7 ) T h e w (8 ) In a v a il a b le s tr e a m h is m t im o r s t « a s e t im s e r t io n he p s o r t is , qu s e is a c c o m e o f e h en w e w to s to r e a fix e d n u m b er o f co m p e n tia l d a ta s t r u c h ır e lis h e d (n q u i c k s o r t is O p le x it ro a p r i a te p p w h en lo . 2 n o t a ll o f t h e d a ta g . ) g n (n ) e r Ja v a g e n e r ic s in e s o r t is O o f m y th r o u g h . . to s o r t is m e d ia te l y . m a p b a se d (1 0 ) A tr e (1 1 ) W e ca n (1 2 ) G iv n t io n o n so m f a e u s e a tr e e a h a sh r e d ic a t e u o w s u s fu n c t io n s e le o - lik e ħr n c tio n s tr u c tu r e to h an d e f fic ie n t l y v a lu e s o 1 a n d le r th a n j in t e r f a c e s e h e a r t o f o b e đ o r ie n te d r e p lic a b le in - p e n ls if o an 1 - e n ts fro m B @ th e o rd e re d 1 12 t hen . s e t o f e le m h (o 1 ) r e a 】i z e h a s a r e la tio n s h i p s in r f a c e im e p r e f e r c l a s s in h e r ita n c e o v e r in t e p le m p i ts e le m s to r e o 2, (1 4 ) W is s im d r . (1 3 ) W e c h a n ic a ll y iv e e r n r r h i r a l r e la t io n s h i p s b e t w e e n e en co d e s M e n p tr e a m e u s e in te r f a c e o r c la s s e x t e n s io n (1 5 ) t h is h . lis t is a v a r i a b le « iz e p e 3 o f 20 . a c c e s s th e s ta ti c m e n t s o f d if fe r e n t t y p e s (4 ) A m (T ) o r fla ts e m in e w h e th e r it is t n æ a r tic u la r f ie ld a rk e d e th o d s c a n d e te r m , . (3 ) A o Pag o b e c t n e e d s to h id e a on c la s s r a c tic e F in a ı to - p le m e M a ti o n = e n ts (n ( U U U ( U 0 U . h (o 2 ) Ja tÆ a e b e c a u s e in h e ń t a n c e . ro g r a m s o th e r la n g u a g e p a r a d ig m - - m is in - g d y n am th e d e fin in g ic d is p a tc h fe a t u r e n o t e a s il y Đ @ . Scanned by CamScanner C S C 20 7 (1 7 fa ) P r a c tic e P r o b le m D ra w o 2 th e s te p e r a tio n s tr e e a s th e F A . B r e a th e . bytep e v o lu tio n ssu m e t v a lu e to (C ) t (d ) t . . . In s e ıt ( 1 ) In s e r t (2 ) ; R e m o Ļ e re m ro ta te u (a ) T r e e < i n t e g e r » (b ) t = Ħ F in a l - t t = . I l ıe w n s e r p o f a b ir ı a r y s e a rc h tr e e a ħ e r e a c h o v a l c h o o s e s th e n e x t la r w a rd s T r e e t (3 ) ; t g e s t e le m o f th e g iv e n e n t in th e in - in s e r t a n d re m o v a l o r d e r tr a v e r s a i o f th e . ◇ . O In s e . ţ (4 ) (1 ) Scanned by CamScanner 図 C S C 207 (17 fa ) P ra c tic e - D o raw th e s te r a tio n s p e e le m e n t in qu e u e (e ) . - p T he th e q F in a l o y « te p ń oń t p y u eu e . e v o lu tio n u q eu e \b u (g ) p q is o f a a m in p rio r it y p ń o r ity d o n o t n e e d to d is tin q u e u e a lt e r e a c h o f th e iw g is , p o l que uth at l n returns g e 5 o t 20 ad d an d p o l l m u m th e in im i g u is h b e tw e e n e q u iv a le n t e le m e n ts in y o u r p r o r ity . P r io r it q u eu e «in t e » y g e r (f) p q pa in - . ' s e r t (8 ) ; . ı n s e r t (6 ) - n e w pq . p r i o r i t y qlu e u e ◇ O ; pų . A d d ( 10 ) I' " r t( 3 ) N e r c (7 ) (h ) p q p o l l . p q p q o Scanned by CamScanner C SC 207 (17fa ) p r a c tic e F in a ı - D ra w pu th e s te t o e r a tio n s p to th e v o lu tio n o f tw o h a s h b y « te p p The . . k e s o f th e h a sh y e r i h t d e s a ib e s th e h a s h g ta b le s ft r j o b je c ts e fı rs t h a sh o f s iz e 3 a n d / ・ . W n en t h is (2 ) r e h a s h i n į * / M a m . p P ta b le is im v a lu e s o f th e s e e n te d ta b le is ħ u l , th e c u r r e n t e le m g « c le m p , c u t (c 1 h a r a ' , a c t ' ) e t > m t he w i th ta b le a p n e w H a e T h e. ta b . u ju s t th e i«e y lin e a r ro b in p g s t r a te y ta b le f r o m M a p o u t, g h l ir s t le f t - r Pag- of20 . le M akť w ith , g y (1 ) d o u b lin to _ X e T hro . ro ce e d s b e n ts o f th e - f ta b le a r e o b e c ts o f ty p e C s u r e to u n ite b o th th e ke y a n d n a lu e in th e ta b le r a th e r Eh a n (i) T h a ch _ a n g in i tia l b a c k in g th e b a c k in g a rr a y a rr a y s iz e ig h t . ◇o Scanned by CamScanner 29 (17 14 Pn - h ta b le is im p le m e n te d w ith a s \ h se c o M Pa g e c tic r F i)k ı n s tr a m tt d \a in li g ) Ķ 0 75 o r g r e a te r s iz e a n d (2 ) æ h a s h in g a r ra y o f e n tr ie s d iv id e i b y th e s iz e o f th e b a c k in g b l e g to c u r ıe n t e l e m / ・ i ・ (ı) d o u b ıin w s by / e n ts o f th e Hap ◆ . くC pu , th e b a c k in g a m le f t ta b le fr o m C lıa r t ( c ı. g a ct er > ' ・ ・ n ・ - t» n e u y r i8 h t Ha . 7 o ł2 0 g , th e th e . Bh H a p ◇O ) Scanned by CamScanner C S C 20 7 (17 fa ) P ra c tic e - P ro C o n s id e r th e fo llo w in Pu b le m b l i c pu b l ic b l i c p v o id u b ıi c b ıĺ c it d a (d ) A Fo e te r m - a D f 1 0 r e w D - e a ch in e if e w ( pr in t ln ( ont . pr in t ln ( t . pr t . pr " " A . f1 ) ı ı B . i n t l ta ( ı ı C . jn t l n ( " f2 " ); } . o u f1" ) " ) B S y s t e nı . in g o u v a r ia b le in i t ia l iz a t io n t is th e s ta t ic a n d d y n a m ic D . f3 s ta te m e n ts , t y p e s o f th e s t a (a ) if it V t e v a r ia b le p e ch ec k s a n d (b ) if . «) c o o f th e a S y s t e m { ha w . u B e x t e n d e , t o . { f 3 0 . S y s t e nı ! o f th e f o ll o w n y A e x t e n d s v o i d n e r a rc h S y s t e m { f 2 0 o es t y p e ch e ck (c ) A d C c l a s s r e a ch c la s s M g e x t e n d s v o i d Pu b l i c Fo B c ıa s s b l i c th e R u n f 1 0 v o i d b l i c n A c ıa e B Pu pu 0 c l a s s PU pu 3 P ag e 8 o f 20 F in a l ) th c o m e m b in a t io n s e th o d o f v a r ia b le in v o c a t io n ty in it ia l iz a t io n p e ch eck s an d s ta t e m (b ) if s o , e n ķ t he a n d o u t m e th o d p u t o f th e m in v o c a t io n s e th o d c a ll , . Scanned by CamScanner C S C 20 7 (17 fa ) P ra c tic e - F in a l Page P C r o b le m 4 T im o n s id e r th e f o ll o w in PU b l i c Pu F b ıi c P b l i c b l i c th is . th is . c ıa 8 s f s t e n ta t io n o f an s o c ia t io n lis t m a F s t = S Ľ D = p p in g i tīet in te y o u r g e r s to c h a n Ja v a b o o le a n s in g e s b e l o w * / ' e n d f s t bo , o l e a ıı e n d ) f ßt s d n A s s o c i a t i o n L i s t L i s t < in t e g e r b l i c B , o o le a n > l i et A s 8 o c i a t i o n L i s t 0 b ıl c fo p le m { P a i r (i n t ıi s pu im g b o o l e a n u b ıi c Pu e / ł w p a i r in t U b l i C Pu pu c l a s s 9 o f 20 t = n e L is w b o o l e a n r (P a i r if g e t ( i n t (p k e y ) { l i s t i p . ◇0 t f e t . E r e t u r n qu a ıe ( k e y ) ) p s . n { d } r e t u r n pu b l i c P F ix th is im v o i d a i r fo n u 1 ı ) - s e t ( i n t o l d = (P a i r if (p if (o l ie t . p le m l d A n . : != d d (n fs n e w p n t a t in n t u b , o o l e a ıı v a l u e ) { ll u p k e y l i e t ) . E qu { a l s (k e y ) ) l l) { l is P a i r (k e y so , t . v t h a t it c a n o l d { R e ın o v a l u e )) h o ld e (o a n y = p ; b ld ) ; p r e a k ; } } a ir o f k e y a n d v a lu e t y p e s b y u s in g g e n e r ic s . Scanned by CamScanner 习 G C m P ro FO r o ?fa ) n - b le m 5 w łh a h 1 G iv e s ta te fu n m . c tio n a th e m G iv e u pu e x li c i t l p re - bom rd if r r 1 fo . Ie ( i n t fo r e l s e If i - bo p o d e ls th e ti m ! n g t h l i n t = 0 j n = e ĺ ; = (a r r [ y u n d f o r y o u r fu n c tio n a t ra c k s f u n c ti o n w a s e ll a s lv s o , e co m p w le x i ty h a t th e n e th a t r e la t io o f th e m in pu fo r a n e th o d t to . th e e x p lic i t . a l ly fo r m F Ie n g t h ) r r 2 w b o o l < a r r 1 Ie . j r a n . < a e r [a r n B = { r 1 . = . i n , u s in g B ig n o ta ti o n . Yo a te th e u c a n s im p ly s t it c o r r e c t , t r e t u r n ıe o - [] a r r 2 n u l l ; i n , t k ) { } n g th ] ī + + ) th a r r 2 [i ] r o v in g a r r 1 f 1 《i n t [ ] i+ 1 j] o u r u r r e n c e r e la tio n y o u r m o d e l is a r e c b o o l e a n 【】 = īf » . e r a t io n s r a th e r th a n r e t o l e a n t] r y a tic a l f u n c tio n s t a t i c bo e th o d s h a t o p re s e n ts b l i c (a w a t ig h t u p p er r p p e W a th e m a tic a l f u n c tio n o r r e c u r r e n c e th a t m a m . th e S in T h e G r e a t G ig e a c h o f th e fo llo w in m g 2 tog ,b Ie k n g t h ) { j+ + r e t [i] » « = t r u e } { r e t u r n o Scanned by CamScanner r C S C 207 (17fa ) P ra c tic e - P ro b le m (a ) C o n s id s p a rın in u se a r M in C m u m s to r te s t v id e d g th e co m p a n n in g w ei g ra g p h te d h tr e e w e i , th e w e i n o d e g ıın an d p u t e th e M p a th s f r o m b o th 11 o f 20 o n e y (M S T ) fo r e th o d P ag e d ir e c te d g ra p h e a rl M y . g iv e th e to ta l w e i h g t o f th e M g S T o f th is g ra p h h li h t in th e r g g ap h a m i n u n S T th a t u y o id e n tif y Y o u m ay . g h t o n s id e r th e f o llo w in g w e i g h te d th e s h o P ro M e r th e fo ll o w in g tr e e y im 6 F in a ı A to , u n e v e r d ir e c te d y h t o f th e s h o r t e s t g ra p h o th e r n o d e in p a th fr o m A b e lo w th e to g u . ra e ach Pa th to jk s t ra se D i p h . Yo u ' s a lg o s h o u ld re rith m n o d e a s w e ll a s th e LL e n g th to o r t in p a th p co m th e p u te s its e lf p a ce . p a th A B C D 三 下 じ H Scanned by CamScanner じ 匡 C SC 20 7 1 1 7 f a P r a r tłæ P r o b le m w r ite a c ı a s s H o ııs t e r th a t r e p m o n s te r h a s a n a n e p a , e 12 o ı 2 【) d T he m U s an 7 Pa g F m al - r e s e n ts a m a tt a c k s ta tis tic s re p r e s e n te d a s in \ lıe a l th a th e g a m e w o r ld in o s itio n o n s te r in Yo u e id e o g a m ng v Nethacktylie roplayß d (a p a ir o f in te g e r s (x Jr)) , , r c la s s s h o u ld su p po rt h e a l th a n . A an d s t r u c to r a n d th e fo llo w in g c o rı o p e r a t io m * H o n e t e r loca b ダ In * * m o o l e a ıı i s A 1 t r i t i n t , lv e O s h o u ld q i ll b e o g 0 y , (x , y ) in a ls o wh , a t t a c k ): t ru e if the is at rd o v e r r id e t h e th r e e s ta n d a re i nı ms i ch c t o » o f a ttr ib u te s t h e g iv e n . mo n s t er a sū i ng o n s te r w i th m c re a te s a n e w th e g a m e w o r ld :r e t u r n s (O b j e u a l e h a ßh c o d ・ w , o s t r i n g b o o l e a ıı e u r w o rk e m ııg x a t p o s it io n a d d it io r Ļ y o u s Yo ( n an e the m th e O b j e c t c la s s e th o d s fr o m ı n fo r m ı a n ıe[ ( xı y ) , h ea '. l th , a t t a c k J ı . . ra d e d o n c o m ecM b e rs û ı a t th e in te r fa c e d e fin e d e s s a s w e l ı a s d e s ig n a b o v e sa y s y o u s h o u ld . In p a r t ic u la r , e x p o se yo u s h o u ld o n ly e x p o se . Scanned by CamScanner C S C 20 7 (1Tfa ) P r a c tic e - F in a l Pa g e P r o b le m 뇨 匡 W r ite a c la s s , an d fo 8 A n In back , it w a rd s Yo I , w ra it Yo u f in it e l t e r a to r «T > ite r a te s th r o u r w a rd y C o lo u r gh it in fin ite l y p s a ro u n d w ra to p s a ro u n d . th e , t T h a t is to th e b a c k in i t e l t e r a t o r r a y L i st <T > over w ra . (h in t: w p p in g to w r a p p in g to Ar r a y L ĺ ( e t« T» , w w a lk s b a c k w a r d s a n d he n w nen . u r In f in it e lt e r a t o r c la s s s h o u ld n f L ik e ha t fr o n t 13 o 6 2 0 f o r w a r d s th r o u g h an am th e ite r a to r r e a c h e s th e e n d o f th e lis t a n d m th e ite r a t o r is a t t h e fr o n t o f th e lis t n a d m y lis t o v es o v es . h a v e th e f o llo w in n g c o s t r u c to r a n d 1 ) : c o n s t ru c t s a n e w In f o p e ra b o n s in ĺ t e l t e r a t o r ov e r th e g i ve n . h en m i g h t th is b e f a ls e ? ) th e f r o n t o f t h e li s t i f i t w a l k s o f f t h e en d th e e n d o f th e lis t if it w a lk s o fï th e h o n t . . Scanned by CamScanner C SC 20 7 (17 fa ) P ra c tic e P r o b le m In c la s s , ty p e . d is c u s s e d e ı t turns ' e c a ll th a t in J t h e e t yp e ja v a . ty p e h rn T r th e la m T h y n an o n y an la v a t ax o a la m Fo r th e s e pu b ıi c m f in al m o lib r a r y c ıa s s a s s u N o d e < T p T p u b l i c N o d e <T > p u b l i c N o d e < T > P u b l i c N o d e (T n ıe a a rg u m , w ta o v e r o u r lis t a b s rr a c t d a th is c o n ta in e r w e p le a s e ! In ro d u c e a n ca l t h is l the R )a s fo llo w s i nt æl ac e s d e f i ne d Fun c t ĺ on «T c a r e a b o u t tw a R an d B iF u n c t io n «T U . R» , - R> . th e t he j n th e - tw e o f . pecified by me t ho d its s a p p ıy is c a lle d e th o d m nc t ion a l iı f of ly n o e ro d u c e a n , e . g . , fun c t i on a l i nt er f a c e . f . p p y (5 ) c a l】s th e A . e n t, d a rd s t a n in a n d p fin it in n te «ex pr e s e i on > g e r p lu , s o n e o f a b in a r y b o d y » , e. . g , ( in t x ) - > x + 1 . se a rch lr e e a s p r e s e n t e d in c la s s C o m p a r a b l e < T > > e x t e n d s v a l u e 8 . t lıi e . Ie t lıi s . R v a lu l e f t r i g h t v a l u e e f t ig h t - = = v a , ı u N o f t r ght i d e < T > B in a r y s e a r c h T r e e «T N o d e < T » r o o t / / Y o 1łT m e th o d s u i ıı l e f t , N o d e < T> r ig h t ) { e le r i v a t e p ty p e s e r nu m b a we th e v a lu e 5 ith f w p fu n c t ion , u s p a U an d b d a th a t r e t u r n s b c ıa s s in c tio n s o v e r a n y se l f is ( « p a r a m e t e r s » ) am b d a i ı u b ıi c b l i c d fo l d ( o u r p u rp o s e s , an d s ta n d a r d e th o d s , t ln pu Fo r . c tio n s th a t ta k e a T a n d b d a s to r e d e s is c t ion by i s d i ct at ed c tio n s th a t ta k e a T Fo a n y ıam b d a Fu n . o f ħm inv o k e p, f il t e r , a th e s e ń , of a o , m . t il u T plement ee le m e n t th e s e h i h e r o r d e r fu n c tio n s o v e r a b in a ry s e a rc h tr g r s io n s a v a 8 w e w o r k w ith a n o n m o u s fu n c tio n s la m b d a e x p e s p , w 14 o f 2 0 ge th e h ig lte r o rd e r u n c tio m o u t th a t w e c a n ll im p ro b le m R B r a in D a m a 9 w Pa g e F in a l - g o h e r e e x t e n d s . . C o m p a r a b l e < T > > . Scanned by CamScanner csc m \u b ) P (a )W th a t FM - ń te an im p Pw le m e n ta tio n o f th e s ta ū c m a p m e th o d o v e r th e B i n a r y s e a r c h T r e e c la s s m a p t a k e s a tr a n s fo r m a ū o n h m c tio n o v e r e le m e n ts a n d p ro d u c e s a n e w a r e th e r e s u lt o f a p p l y in g th is fu n c tio n to th e e le m e n ts o f th e o ld Pu b ıi c s t a t i c < T U» , B in a r s e a r c h T r e e « u » y tr e eM a p (F u n c t i o n « T B in r o r e x am le p , w e m a y m tr e e lS c f m . R e c a ll tre e w h o s e e le m e n ts . , U» f , ar y se a r ch T r e e < r» t ) p th e fo llo w in g in p u t tr e e : t To th e fo ll o w in g o u t u t tr e e p ー ハ fa ls e By p h e lp a s s in g a tr a n s fo r m e r ń tn c tio n c a ll e d b y th a t a t io n r p e fo r m y o u r t r e e M a p f u n c t io n f a ls e th a t r e t u r n s t r u e i f t h e in s r e c u r s iv e in s e r tio n f u n c t io n w ith th e r o o t . ) p u t is e v e n o v e r th e n o d e s o f a tr e e . . (H T h is in t Y u u w u I n ee d a h e l e r w ill th e n b e p Scanned by CamScanner C S C 207 (17 fa ) P ra c t ic e - C o m p le te d p J in itin n th e P ag e 16 o f 20 F in a l o f th e Jo ld s ta tic m e th o d th e o ver B in a r y s e a r ch T r e e w c la s s i th s i n a tu r e g pub l i c s t a t ic «T , R» R tr B in fo th e l d u p d a te d in u la te d v a lu e . v a lu e Fo fa r a s so r exa m p le , if T , , R» f a r y s e ar ch T r e e <T » a b in a r y in itia l v a lu e a n d ta k e s a s in u t an p a cc u m c t i o n «R e e F o l d ( B i F 1m w e ll a s w e fo ld a d d i tio n th e ħm R i n i t i a l t ) tr a n s fn r m c u r r e n t e le m th e , f u n c t io n a tio n e n t o f th e c t io n tr e e o v e r th e . T h is a n d f n llo w p ro d u ce s in g ta k e s f n n r tin n w tr e e a n e w i th a n i t ia l v a l u e o f 0 /\ 1 Then A th e r e s u lt o f th e f o ld ss u m e th a t f o l d a p p is 0 + 2 + 1 + lie s its a r u m g 3 = 6 3 . e n t f u n c t io n to th e tr e e u s in g a n in o r d e r tr a v e r s a i . Scanned by CamScanner - (c )C o m ple te pu b l ic Pa g F in łıı C S C 20 7 (17 fa ) P r a c tice th e d e fin itio n o f th e s ta tic st a t ic <T > jitte r B in a r y s e a r ch T r e e «T > m e th o d B in a r y s e a r ch T r e e d a ss ov er (F u n t r e e F i l t e r ct ion <T B in f il t e r th e n e le m ta k e s k e e m t a s in u t a n p p s a ll th e Fo . r ex a m e le m p le , in i t ia l v a l u e e n t s o f th e w e m a y m a p a n d tr e e a f u n c tio n w h e re th e th e fo llo w i n g in f ro m e 17 o f 20 . > B o o l e a n ar y s e a r ch T r e e <T > e n t s o f th e e le m (o r f u n c t io n d ic a te p re tr e e f ) t to . b o o le a n s ) returns tr u e F ilte r . fo r trm t u t tr e e p /\ 1 If th o u r f ilte r r e t u r n e d t ru e f o r a n y in te g e r th a t w a s o d d T o im p le m e n t f i l t e r a s s u , m e t h e e x is te n c e o f a e B in a r y s e a r c h T r e e c la s s tr a v e r s a u 3 i, p d a te d (H tr a v in p r e s e r v in tr e e t to th e g a f te r r e m im e r s e t h e o ld p le m tre e th a t r e m o rd e r o v a l , o v o f th e th e b in a r y m e th o d p u b ıi c f ir s t o c c u r r e n c e s e a rch tre e . M o f t e m b o o ıe a n fr o m e th o d th e r e m o v e (T tre e re tu rn s in a n th e t ) in - in o rd e r r o o t o f th e . e n t th is r e m o v e s . in f u n c t io n , fir s t g n o d e s fr o m c r e a te th e n e w a c o p y o f th e lt e e u s ĵ n g th e tr e e to a s su m f il te r u s in e d r e m o v e g m a p m e th o d . T hen . ) Scanned by CamScanner l P r a c t ic e C S C 2 0 7 ţ w ta ì - P ro Im a g in e th a t y o u a r e w th e te x t e . g , (R e lite buñr a rra an . y Beca u . ri 山 吧 a te x t e d i to r p r o g r a m Ja v a c a ll th a t c h a r a c te r li te r a ls in r h a r a r tp r s in lin e . ( a th e b u f fe r to in s e H o w r t te x t in t o ca n w o f re r e s e n t in g p D o n s tr a te em s ta n c e s c a n ta k e a d s to r e is to in c lin a tio n a n te x t in th e is ro g ra m p a r ra y th e e o n ly a n c e p r o b le m b u ffe r (H in r fo r m p e te x t s o t . w w n a t is it ? c o n s id e r w in s e r tio n ' s in g le q u o te s a n d i th w s o f th e c u r s o r in e d it te x t ith e c ia ll y p \n ' th e c h a r a c te r is th e y a r e s im p ly - D e m p o n o n to a th e e x a m lis t in v a n ta g e o f t h is f a c t w h e n 0 p (1 ) tim in s e r t in g o r rem l is t o p e r a t io n a d d i tio n a l T he W a t th e c u r s o r is a n e s s e n tia l so r o v e c h a r a c te r s ) a t th e c u r w o n e n ee d , howeve th e to p sa m p to e tr y lis t o f a rra y le e r fo r m w h e n w in s e r t te x t , ・ o re o te n t ia ll y ith t h is in c u rs o r ? D e s c r ib e e ıli c ie n t l y ? a m o r z e d lis t o f c h a r a c t e r s a b o v e e ? . ) c u rso r m le d o n s tr a te th is p r o b le m la r g e (1 ) (p is (a d b u f fe r th e ta t io n th is c h o ic e o f r e p r e s e n h a t a rray a t th e th a t in s e r tio n u r sc h p m y o w e a d d r itt e n . h a t h a p p e n s if th e t e x t b u ff e r is v e r y w firs t r a su c h ta in k e y p ie c e o f ) is a b ig p e r fo r m c h a r a c te r s g iv e a b o v e a n d a re w e c a r e t a b o v e r e p r e s e n t s th e p o s i tio n )T h e r e u o , o te th a t n e w lin e s a r e n o t tr e a te d N a r t o f a t e x t b u ffe r b e c a u s e w e c a n p n a tu r e s e te x t is lin e a r in The - lis t o f r h a r a c t p r s r a l fo r a n e w th 18 o 6 2 0 e E c li s e p 1 0 b le m Pag F in a l m in d , ho . w c an w a l te r n a t iv e fr a r t io n o v e r a (H in t a n U n d e r w e s p li t u p o f th e w a y te x t ) h a t c ir c u m th e . - t e x t to ) Scanned by CamScanner i 7 W p r a c tic e ţ In R L Pag e \c ) D e s i n a d a ta s t g r u c t u r e th a t a llo w s u s to e f fic ie n tl y th a n Yo th e v e s c h e m e d e s c r ib ed ab ove u r T e x tB u f f e r c la s s s h o u ld ・ ' T e x t B u f f e r o v o T he v ' T o i d fo llo w id (c h i n s e r t in g m ) m (ĺ th e f o llo w in p ty te x t e m , in s e r ķ th e g iv e n e th o d s o f th e A rr a n d e x ) re m . Im jn s e r tio n in to th e te x t a t th e c u r so r m c o n s tr u c to r a n d g b u H er o re le m e n t th is in a c la p s s c a l le d T e x t B u f f e r m . e th o d s . o ve b ack w a r d s a d d (v ) : a d d s ıı t o r e m o v e c o n ta in c r e a te s a n e w c a u s e s th e c u rso r to * p e rfo rm 19 o f 20 th e e n d c h a r a c te r a t th e c u rs o r a n d a d v a n c e s th e c lı rso r y L is t c la s s w i ll b e h e l ı in n rr im im ľp ń udı ı le le m yy oo utı pp o f th e o v e s th e e le m a rr a y lis t e n t a t th e g ee nn ta ta tt io io nn (o p e r a te s .. . iv e n in d e x f r o m th e a r r a y lis t . Scanned by CamScanner

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CS 207 Practice Final
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