_{Titolo rubato ispirato dalla risposta di Greg Hewgill a Qual è la differenza tra JavaScript e Java?}

introduzione

Java e JavaScript sono linguaggi comunemente usati tra i programmatori e sono attualmente i tag più popolari su Stack Overflow. Eppure, come tutti sappiamo, a parte nomi simili, i due non hanno quasi nulla in comune.

In onore di uno dei dibattiti più famigerati della programmazione e ispirato alle mie recenti frustrazioni nella ricerca di tag , propongo quanto segue:

Sfida

Scrivi un programma che accetta una stringa come input. Restituisce carse la stringa inizia con "Java" e non include "JavaScript". Altrimenti, ritorna carpet.

Esempio di input e output

auto:

java
javafx
javabeans
java-stream
java-script
java-8
java.util.scanner
java-avascript
JAVA-SCRIPTING
javacarpet

tappeto:

javascript
javascript-events
facebook-javascript-sdk
javajavascript
jquery
python
rx-java
java-api-for-javascript
not-java
JAVASCRIPTING

Gli appunti

• La corrispondenza dell'input deve essere sensibile al maiuscolo / minuscolo
• Solo le possibilità di output dovrebbero essere carocarpet
• Punti bonus immaginari se la tua risposta utilizza Java, JavaScript o Regex
• Titolo alternativo: Java è JavaScript come ham è come criceto

Polyglot Java / JavaScript, 108 107 106 byte

//\u000As->s.matches("(?i)(?!.*javascript)java.*"/*
a=>/(?!.*javascript)^java/i.test(a/**/)?"car":"carpet"

Esegui come Java

//\u000As->s.matches("(?i)(?!.*javascript)java.*"/*
a=>/(?!.*javascript)^java/i.test(a/**/)?"car":"carpet"

Provalo online!

Nota: non fidarti dell'evidenziazione poiché non è corretto. Il vero Java, correttamente interpretato appare come di seguito perché \u000Aviene interpretato nel primo passo della compilation come \n, di fatto termina il commento che è iniziato con la riga comment ( //).

//
s->s.matches("(?i)(?!.*javascript)java.*"/*
a=>/(?!.*javascript)^java/i.test(a/**/)?"car":"carpet"

Esegui come JavaScript

//\u000As->s.matches("(?i)(?!.*javascript)java.*"/*
a=>/(?!.*javascript)^java/i.test(a/**/)?"car":"carpet"

Crediti a @CowsQuak per la versione JS.

let f=

//\u000As->s.matches("(?i)(?!.*javascript)java.*"/*
a=>/(?!.*javascript)^java/i.test(a/**/)?"car":"carpet"

var a=["java","javafx","javabeans","java-stream","java-script","java-8","java.util.scanner","javascript","java-avascript","javascript-events","facebook-javascript-sdk","javajavascript","jquery","python","rx-java","java-api-for-javascript","not-java"];

for(var s of a) console.log(s.padStart(a.reduce((x,y)=>x.length>y.length?x:y).length) + "=>" + f(s));

Quanti punti bonus immaginari per questa risposta?

-1 byte grazie a @Nevay nella risposta Java.

JavaScript, 50 49 bytes

Saved 1 byte thanks to @ValueInk by rearranging the regex

a=>/javascript|^(?!java)/i.test(a)?"car":"carpet"

Test snippet

let f=

a=>/javascript|^(?!java)/i.test(a)?"carpet":"car"

var a=["java","javafx","javabeans","java-stream","java-script","java-8","java.util.scanner","java-avascript","javascript","javascript-events","facebook-javascript-sdk","javajavascript","jquery","python","rx-java","java-api-for-javascript","not-java"];

for(var s of a) console.log(s.padStart(a.reduce((x,y)=>x.length>y.length?x:y).length) + "=>" + f(s));

Java (OpenJDK 8), 92 82 72 58 57 bytes

s->s.matches("(?i)(?!.*javascript)java.*")?"car":"carpet"

Try it online!

1 byte saved thanks to @Nevay!

C (only calling puts), 131 bytes

f(int*s){char r[]="carpet";~*s&'AVAJ'||(r[3]=0);for(;*s&255;*(int*)&s+=1)~*s&'AVAJ'||~s[1]&'IRCS'||~s[2]&'TP'||(r[3]='p');puts(r);}

It does have its problems, but it passes all of the testcases provided :)

g(int* s)
{
  char r[] = "carpet";
  ~*s&'AVAJ' || (r[3]=0);
  for(;*s & 255; *(int*)&s +=1)
    ~*s&'AVAJ' || ~s[1]&'IRCS' || ~s[2]&'TP' || (r[3]='p');
  puts(r);
}

Imaginary bonus points if your answer uses Java, Javascript, or Regex

well... no thanks

05AB1E, 21 bytes

lD'¦‚å≠sη'îáå*„¾„ƒ´#è

Try it online!

Python 2, 68 bytes

k=input().lower();print'car'+'pet'*(k[:4]!='java'or'javascript'in k)

Try it online!

-11 bytes thanks to notjagan
-2 bytes thanks to Dennis

C#, 80 78 bytes

s=>(s=s.ToLower()).StartsWith("java")&!s.Contains("javascript")?"car":"carpet"

EXCEL Google Sheets, 89 86 Bytes

Saved 3 bytes thanks to Taylor Scott

=LEFT("carpet",6-3*ISERR(SEARCH("javascript",A1))+3*ISERR(IF(SEARCH("java",A1)=1,1,1/0

Takes an input on A1

Explanation

=LEFT("carpet",6-3*ISERR(SEARCH("javascript",A1))+3*ISERR(IF(SEARCH("java",A1)=1,1,1/0)))

 SEARCH("javascript",A1)        #Case-Insensitive Find, returns error if not found  
 ISERR(                         #Returns string true if error, False if not
 3*ISERR(                       #Forces TRUE/False as integer, multiplies by 3
 IF(SEARCH("java",A1)=1,1,1/0)  #If java found, returns integer. if 1, java begins string
                                #so returns 1, which will be turned into 0 by iserr.
                                #Else returns 1/0, which will be turned into 1 by iserr.
 LEFT(                          #Returns digits from the left, based upon count.

vim, 58 bytes

gUU:s/.*JAVASCRIPT.*/Q/g
:s/^JAVA.*/car
:s/[A-Z].*/carpet

Try it online!

Jelly, 27 bytes

,“Ẋṣ“®Ẓȷ»ŒlwЀ/Ḅn2‘×3“¢Ẹị»ḣ

Try it online!

Ruby, 42+1 = 43 bytes

Uses the -p flag.

$_="car#{"pet"if~/javascript|^(?!java)/i}"

Try it online!

Retina,  44  37 bytes

Ai`^(?!.*javascript)java
.+
pet
^
car

Thanks to @MartinEnder for golfing off 7 bytes!

Try it online!

Common Lisp, 131 125 bytes

(lambda(s)(format()"car~@[pet~]"(or(<(length s)4)(not(#1=string-equal"java"(subseq s 0 4)))(search"javascript"s :test'#1#))))

Try it online!

Size reduced thanks to the #n= “trick” of Common Lisp.

Explanation

(lambda (s)                 ; anonymous function
  (format                   ; use of format string to produce the result
    ()                      ; the result is a string
    "car~@[pet~]"           ; print "car", then print "pet" when:
    (or (< (length s) 4)    ; the string is less then 4 characters or
        (not (string-equal "java" (subseq s 0 4)))     ; does not start with java or
        (search "javascript" s :test 'string-equal)))) ; contains javascript

C (tcc), 144 136 bytes

a;f(s){char*t=s;for(;*t;a=!strncmp(s,"java",4))*t=tolower(*t++);for(t=s;*t;)s=strncmp(t++,"javascript",10)&&s;puts(a*s?"car":"carpet");}

Try it online!

Unrolled:

a;
f(s)
{
    char *t = s;
    for (; *t; a = !strncmp(s, "java", 4))
        *t = tolower(*t++);
    for (t=s; *t;)
        s = strncmp(t++, "javascript", 10) && s;
    puts(a*s ? "car"  :"carpet");
}

Excel, 84 bytes

="car"&IF(AND(ISERR(SEARCH("javascript",A1)),IFERROR(SEARCH("java",A1),2)=1),,"pet")

Excel VBA, 76 Bytes

Anonymous VBE immediate window function that takes input from range [A1] and outputs is car/carpet status to the VBE immediate window

Does not use RegExp

?"car"IIf(InStr(1,[A1],"Java",1)*(InStr(1,[A1],"JavaScript",1)=0),"","pet")

Python 3, 95 bytes

g=lambda s:(lambda r:'car' if r[:4]=='java' and 'javascript' not in r else 'carpet')(s.lower())

Try it online!

Yeah, it could be shorter but I wanted to try using a nested lambda!

Perl, 42 bytes

I believe the answer by stevieb has an incorrect output (tried that one myself - it returns car for 'javajavascript'). This should work:

say/^java/i&&!/javascript/i?'car':'carpet'

Mathematica, 82 bytes

regex

If[#~StringMatchQ~RegularExpression@"(?i)(?!.*javascript)^java.*","Car","Carpet"]&

JAISBaL, 36 bytes

℠℘(?!.*javascript)^java.*}͵Ucar½Upet

Verbose/explanation:

# \# enable verbose parsing #\
tolower                           \# [0] convert the top value of the stack to lowercase #\
split (?!.*javascript)^java.*}    \# [1] split the top value of the stack by (?!.*javascript)^java.*} #\
arraylength                       \# [2] push the length of the array onto the stack #\
print3 car                        \# [3] print car #\
!if                               \# [4] if the top value on the stack is falsy, skip the next statement #\
print3 pet                        \# [5] print pet #\

JAISBaL was my first attempt at designing a golfing language, so it's rather quirky... there's no matches or contains, regex or otherwise, so instead we have to split and check the resulting array length... because JAISBaL has a split-by-regex... but no other regex support.... because reasons.

Regex stolen borrowed from @Cows Quack's answer.

Python 2, 69 bytes

f=input().lower().find
print'car'+'pet'*(f('java')!=~f('javascript'))

Currently 1 byte longer than the shortest Python 2 solution.

Try it online!

Perl, 36 bytes

say/^java(?!script)/i?"car":"carpet"

Run it as such:

perl -nE 'say/^java(?!script)/i?"car":"carpet"' java.txt

Batch, 91 bytes

@set/ps=
@set t=%s:~0,4%
@if "%t:java=%%s:javascript=%"=="%s%" (echo car)else echo carpet

Takes input on STDIN. Batch doesn't have a case insensitive comparison operator but it does have case insensitive string replacement so I can assign a temporary to the first four characters and then case insensitively replace java, which should then result in the empty string. Meanwhile I case insensitively replace javascript in the original string, which should leave it unchanged.

Lua, 96 bytes

function(x)return x:lower():match"^java"and not x:lower():match"javascript"and"car"or"carpet"end

Perl, 98 84 62 Bytes

sub a{"car".($_[0]=~/javascript/i||$_[0]!~/^java/i?'pet':'');}

Try it online!

Thanks to bytepusher

Dart VM, 104 bytes 102 bytes

main(p){p=p[0].toLowerCase();print("car${p.indexOf('java')==0&&p.indexOf('javascript')<0?'':'pet'}");}

Explanation:

Degolfed:

main(p)
{
    p = p[0].toLowerCase();
    print("car${p.indexOf('java') == 0 && p.indexOf('javascript') < 0 ? '' : 'pet'}");
}

We have our usual main function

We replace p with p[0].toLowerCase(); so that we don't have to declare a new variable (var plus a space would be 4 extra bytes)

We then proceed to do the actual printing

We print car unconditionally and we use inline statements for checking whether to print pet after it or not. If it has the string 'java' at index 0 and does not have 'javascript' in it, we do nothing (we actually append an empty string but it does not have any effect) and otherwise we append pet.

Rust, 97 bytes

let s=if Regex::new(r"^javascript|^!java$").unwrap().is_match("javascript"){"carpet"}else{"car"};

I'm pretty sure that there is a shorter solution but it's my first try :)

Bracmat, 66 bytes

(f=.pet:?b&@(low$!arg:(? javascript ?|java ?&:?b|?))&str$(car !b))

Try it online!