程序代写代做代考 html interpreter C DNA graph 11/6/2020 Scheme Built-In Procedure Reference | CS 61A Fall 2020

11/6/2020 Scheme Built-In Procedure Reference | CS 61A Fall 2020
Scheme Built-In Procedure Reference
[x]
Core Interpreter
apply
procedure
apply display
val val
displayln
x

x
(apply )
args
scm> (apply + ‘(1 2 3))
6
(display )
(displayln )
https://cs61a.org/articles/scheme-builtins.html
1/17
.dedulcni yllacitamotua eb ton lliw enil wen A .setouq tuohtiw tuptuo eb lliw ti ,gnirts emehcS a si fI . stnirP
.noitcnuf a erew ti fi sa orcam a staert ,suhT .noitaulave lanrognitouqlaitiniehttuohtiworcamehtgnillacfotceeehtsahsiht,sorcamnO
. fo tsil nevig eht htiw sllaC
.ni depyt snoisserpxe laretil eht ton stnemugra detaulave tneserper stnemele eht taht sni-tliub eseht fo lla rof demussa si tI .tnemele gnidecerp
eht fo eno naht erom eb nac ereht taht etacidni sespillE . tnemele lanoitpo na ot srefer elihw ,yrav nac taht tnemele deriuqer a ot srefer ,woleb snoitined xatnys eht fo lla nI
.serudecorp ni-tliub lanoitidda lareves sedulcni )gro.a16sc.emehcs//:sptth( reterpretni bew ehT .)emehcs/reterpretni/stessa/gro.a16sc//:ptth( reterpretni emehcS ats dnatcejorpemehcSehtniserudecorpni-tliubehtrofecnereferasasevrestnemucodsihT
0202 gnirpS :detadpU tsaL

11/6/2020
display error
SchemeError msg
eval
expression
exit
load
Scheme Built-In Procedure Reference | CS 61A Fall 2020
(error )
msg
(eval )
scm> (eval ‘(cons 1 (cons 2 nil)))
(1 2)
(exit)
(load )
newline
print
filename
filename
filename
import-inline
load
(newline)
(print …)
https://cs61a.org/articles/scheme-builtins.html
2/17
val
display
.enilwenadna,gnirtsemehcSanosetouqretuoehtedulcni lliwsiht, ekilnU.secapsybdetarapes, hcaefonoitatneserperemehcSehtstnirP
.tnemnorivnetnerrucehtniedocemehcSehtsetaulavednaLRUasekathcihw , sigolanatsesolcehT. troppusyltnerructonseods’reterpretnibewehT
.detpmetta eb lliw mcs. ,dnuof ton si el taht fI .lobmys a ebtsum .nihtiwedocehtsetaulavedna htiwelehtfostnetnocehtsdaoL
.gnihtonseodsiht,reterpretnibewehtnI.reterpretniehtstixE
eb lliw egassem s’rorre eht , on si ereht fI .egassem s’ti sa htiw
.ytpme na sesiaR
.tnemnorivne tnerruc eht ni
setaulavE
.dne eht ta enilwen a sedulcni tub ,
ekiL
.enil wen a stnirP

11/6/2020
Scheme Built-In Procedure Reference | CS 61A Fall 2020
Type Checking
atom?
arg boolean?
arg integer?
arg list?
arg
(atom? )
(boolean? )
(integer? )
(list? )
scm> (list? ‘(1 2 3))
True
scm> (list? (cons-stream 1 nil))
False
number?
(number? )
arg null?
arg nil
(null? )
https://cs61a.org/articles/scheme-builtins.html
3/17
.esiwrehtoeslaf;)tsilytpmeeht( si fieurtsnruteR
.esiwrehto eslaf ;rebmun a si fi eurt snruteR
.pooletinnirororrenaesuacyamsiht,elcycasahtsil ehtfI.esiwrehtoeslaf;)maertsaniatnoct’nseodti,.e.i(tsildemrof-llewasi fieurtsnruteR
.esiwrehto eslaf ;regetni a si fi eurt snruteR
.esiwrehto eslaf ;naeloob a si fi eurt snruteR
.esiwrehtoeslaf;linro,gnirts,lobmys,rebmun,naeloobasi fieurtsnruteR

11/6/2020
pair?
arg procedure?
arg promise?
arg string?
arg symbol?
arg
Pair and List Manipulation
append
lst
Scheme Built-In Procedure Reference | CS 61A Fall 2020
(pair? )
(procedure? )
(promise? )
(string? )
(symbol? )
(append [lst] …)
https://cs61a.org/articles/scheme-builtins.html
4/17
lst
nil
fi snruteR .tsil elgnis a otni redro ni s
.s on lla fo smeti eht gnidneppa fo tluser eht snruteR
.esiwrehto eslaf ;lobmys a si
fi eurt snruteR
.esiwrehto eslaf ;gnirts a si
fi eurt snruteR
.esiwrehto eslaf ;esimorp a si
fi eurt snruteR
.esiwrehto eslaf ;erudecorp a si
fi eurt snruteR
.esiwrehto eslaf ;riap a si
fi eurt snruteR

11/6/2020 Scheme Built-In Procedure Reference | CS 61A Fall 2020
scm> (append ‘(1 2 3) ‘(4 5 6)) (123456)
scm> (append)
()
scm> (append ‘(1 2 3) ‘(a b c) ‘(foo bar baz))
(1 2 3 a b c foo bar baz)
scm> (append ‘(1 2 3) 4)
Error
car
cdr
car pair pair
(car )
(cdr )
cdr pair pair cons
(cons )
length
list
map
first car rest
arg arg
item
cdr
(length )
(list …)
(map )
https://cs61a.org/articles/scheme-builtins.html
5/17
proc
lst
. nimetihcaeno)erudecorptnemugra-enoa( gnillacybdetcurtsnoctsilasnruteR
.stnemele sti sa redro ni s
eht htiw tsil a snruteR
.rorre na esuac lliw siht ,tsil a ton si fI .
fo htgnel eht snruteR
eht sa dna
eht sa
htiw riap wen a snruteR
.riap a ton si
fi srorrE .
fo eht snruteR
.riap a ton si
fi srorrE .
fo eht snruteR

11/6/2020
filter
reduce
Scheme Built-In Procedure Reference | CS 61A Fall 2020
(filter )
(reduce )
Mutation
set-car!
(set-car! )
car pair value pair set-cdr!
cdr pair value pair
Arithmetic Operations
reduce
lst
pred
lst
combiner
lst
+
–
num
num
(set-cdr! )
(+ [num] …)
(- …)
https://cs61a.org/articles/scheme-builtins.html
6/17
lliw siht ,rebmun a ton si
yna fI .enon era ereht fi 0 snruteR .s
.rorre lla fo mus eht snruteR
.riap a eb tsum . ot fo eht steS
.riap a eb tsum . ot fo eht steS
.meti eno .tnemugra dnoces eht sa eulav wen eht dna tnemugra tsr eht sa dessapeulavdenibmocgnitsixeehthtiw,thgir-ot-tfelmorfskrow.)erudecorptnemugra -owt a( gnisu ni tnemele hcae gninibmoc yllaitneuqes fo tluser eht snruteR
tsael ta niatnoc tsum
.)erudecorp tnemugra-eno a(nodellacnehweurtnrutertahtfostnemeleehtylnofognitsisnoctsilasnruteR

11/6/2020
Scheme Built-In Procedure Reference | CS 61A Fall 2020
*
/
divisor
num
num
num
num num
num
(* [num] …)
(/ [divisor] …)
divisor
divisors
dividend
dividend
dividend
scm> (/ 4)
0.25
scm> (/ 7 2)
3.5
scm> (/ 16 2 2 2)
2
abs
expt
modulo ab
num
power
(abs )
(expt )
base
(modulo )
https://cs61a.org/articles/scheme-builtins.html
7/17
.srebmun eb tsum s
lladna .noisividrooton,noisivideurtseodni-tliubsihT. ehtfotcudorpeht yb dedivid nruter ,esiwrehtO . yb dedivid 1 nruter ,s on era ereht fI
.srebmun eb tsum htoB . oludom snruteR
.srebmun eb tsum htoB .rewop eht ot desiar eht snruteR
.rebmun a eb tsum hcihw , fo eulav etulosba eht snruteR
.rorre lliw siht ,rebmun a ton si yna fI .enon era ereht fi 1 snruteR .s lla fo tcudorp eht snruteR
.rorre lliw siht ,rebmun a ton si yna fI .s gniniamer eht fo mus eht sunim tsr eht nruter ,esiwrehtO .noitagen sti nruter , eno ylno si ereht fI