Java is to JavaScript as Car is to Carpet

Question

_{Title stolen inspired by Greg Hewgill's answer to What's the difference between JavaScript and Java?}

Introduction

Java and JavaScript are commonly used languages among programmers, and are currently the most popular tags on Stack Overflow. Yet aside from similar names, the two have almost nothing in common.

In honor of one of programming's most infamous debates, and inspired by my recent frustrations in tag searching, I propose the following:

Challenge

Write a program which takes in a string as input. Return car if the string begins with "Java" and does not include "JavaScript". Otherwise, return carpet.

Example Input and Output

car:

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

carpet:

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

Notes

Input matching should be case insensitive
Only possibilities for output should be car or carpet
Imaginary bonus points if your answer uses Java, JavaScript, or Regex
Alternate Title: Java is to JavaScript as ham is to hamster

The new pattern-matching tag needs a wiki. Please contribute if you can — user63187, Jul 13, 2017 at 16:29
Depending on the order things are done in, javacarpet might catch bugs that the existing test cases don't. — Ray, Jul 13, 2017 at 21:17
If you get imaginary bonus points if your answer uses Java, Javascript, or Regex, does that make such solution's bytecount complex? ;) — Steadybox, Jul 13, 2017 at 21:34
Alternate Title: Java is to JavaScript as ham is to hamster Actually, the "ham" in "hamster" is cognate to the food "ham". The food "ham" is pig meat, and the term "hamster" is derived from the related animal, the guinea pig, whose meat replaced pigs meat on long sea voyages as the animals were easier to raise on a ship. — dotancohen, Jul 17, 2017 at 8:14

Stevoisiak · Accepted Answer · 2017-07-17 02:45:23Z

109

Java/JavaScript Polyglot, 108 107 106 bytes

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

Run as Java

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

Try it online!

Note: don't trust the highlight as it's incorrect. The real Java, properly interpreted looks like below because \u000A is interpreted in the very first step of the compilation as \n, de facto ending the comment that started with the line comment (//).

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

Run as JavaScript

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

Credits to @CowsQuak for the JS version.

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));

How many imaginary bonus points for this answer?

-1 byte thanks to @Nevay in the Java answer.

edited Jul 17, 2017 at 2:45

Stevoisiak

5591 gold badge4 silver badges10 bronze badges

answered Jul 13, 2017 at 23:17

Olivier Grégoire

14.4k3 gold badges31 silver badges56 bronze badges

1

\$\begingroup\$ This isn't competitive in JavaScript or Java. I'm not even convinced it's a serious contender, which is a requirement for all submissions. \$\endgroup\$
– Dennis
Jul 14, 2017 at 1:05
12

\$\begingroup\$ @Dennis Thank you for your information. However I consider this as a polyglot entry. Is there any rule against polyglot entries when they aren't explicitly requested? I tried to golf this as much as possible. For instance, I tried to put both regexes together, but I couldn't get anything shorter than this (because of the two different albeit similar regexes, and their delimiter). It's also impossible to have the same variable definition because JavaScript doesn't allow a new line between a and =>. I tried to stay in the spirit of golfing. If I did something wrong, please tell me? \$\endgroup\$
– Olivier Grégoire
Jul 14, 2017 at 10:11
31

\$\begingroup\$ @Dennis IMHO "Java/JavaScript polyglot" counts as its own language, in which case this is very competitive. \$\endgroup\$
– ETHproductions
Jul 14, 2017 at 15:29
1

\$\begingroup\$ @OlivierGrégoire I'm not saying this isn't a well-golfed polyglot submission, but it's debatable if there should be polyglot submissions to non-polyglot challenges in the first place. They came up as part of the Can serious contenders do more than the challenge asks for? discussion, but I don't think there's a clear consensus on this particular topic. Personally, I'm not in favor. \$\endgroup\$
– Dennis
Jul 14, 2017 at 16:00
4

\$\begingroup\$ @Dennis Thank you for your insights, I now understand what you meant. Should this answer be tagged as "non-competitive", according to you? On the other hand, while I'm not speaking for all polyglot answers (this is my first ever), this one has the special meaning that the challenge speaks about both Java and JavaScript, and that the "imaginary bonus points" were explicitly awarded for Java, JavaScript and regex answers before I wrote this answer. Java and regex can be combined, JavaScript and regex can be combined, why not all together? Anyways, I don't mind marking this as non-competitive. \$\endgroup\$
– Olivier Grégoire
Jul 14, 2017 at 16:23

| Show 1 more comment

user41805 · Accepted Answer · 2017-07-14 05:45:12Z

18

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));

edited Jul 14, 2017 at 5:45

answered Jul 13, 2017 at 15:58

user41805

13.1k6 gold badges40 silver badges88 bronze badges

\$\begingroup\$ I was going to steal your regex but that would have made my answer longer :o nice answer though \$\endgroup\$
– hyper-neutrino ♦
Jul 13, 2017 at 16:01
\$\begingroup\$ Now we just need a java answer. \$\endgroup\$
– DJMcMayhem
Jul 13, 2017 at 16:02
\$\begingroup\$ We have a Java answer, but... I came to the roughly same regex... \$\endgroup\$
– Olivier Grégoire
Jul 13, 2017 at 16:25
\$\begingroup\$ alternatively: /^java(?!script)/i \$\endgroup\$
– mystery
Jul 13, 2017 at 18:47
1

\$\begingroup\$ @OlivierGrégoire ah, damn, that one seems unfair \$\endgroup\$
– mystery
Jul 13, 2017 at 20:48

| Show 3 more comments

Stevoisiak · Accepted Answer · 2017-07-17 02:54:32Z

15

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!

edited Jul 17, 2017 at 2:54

Stevoisiak

5591 gold badge4 silver badges10 bronze badges

answered Jul 13, 2017 at 16:02

Olivier Grégoire

14.4k3 gold badges31 silver badges56 bronze badges

2

\$\begingroup\$ You can omit the caret as String#matches attempts to match the entire string. \$\endgroup\$
– Nevay
Jul 13, 2017 at 23:45

Add a comment |

David Foerster · Accepted Answer · 2017-07-17 10:42:10Z

11

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

edited Jul 17, 2017 at 10:42

David Foerster

4742 silver badges11 bronze badges

answered Jul 13, 2017 at 21:02

michi7x7

4053 silver badges6 bronze badges

Add a comment |

Erik the Outgolfer · Accepted Answer · 2017-07-13 15:53:42Z

8

05AB1E, 21 bytes

lD'¦‚å≠sη'îáå*„¾„ƒ´#è

Try it online!

answered Jul 13, 2017 at 15:53

Erik the Outgolfer

40.6k5 gold badges42 silver badges122 bronze badges

2

\$\begingroup\$ lD“¦‚“åi“¾„“ë“îá“åi…carë 3 bytes more and 1 hour late :(. Nice job. \$\endgroup\$
– Magic Octopus Urn
Jul 13, 2017 at 17:14

Add a comment |

hyper-neutrino · Accepted Answer · 2017-07-14 16:19:17Z

8

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

edited Jul 14, 2017 at 16:19

answered Jul 13, 2017 at 15:53

hyper-neutrino♦

42.4k5 gold badges66 silver badges224 bronze badges

\$\begingroup\$ 11 bytes shorter. \$\endgroup\$
– notjagan
Jul 13, 2017 at 15:55
\$\begingroup\$ Slightly different 81 byte solution \$\endgroup\$
– Justin
Jul 13, 2017 at 19:23
\$\begingroup\$ @Justin That too. Nice. \$\endgroup\$
– hyper-neutrino ♦
Jul 13, 2017 at 20:10
\$\begingroup\$ If you switch to Python 2, you can save 2 bytes with a full program. \$\endgroup\$
– Dennis
Jul 14, 2017 at 6:50
1

\$\begingroup\$ @LukeSawczak Oh I didn't even realize that :P I was using Java right before that and in Java ; is required so I since I have to use it anyway the newline is unnecessary :P That's why I used it. \$\endgroup\$
– hyper-neutrino ♦
Jul 14, 2017 at 18:31

| Show 4 more comments

TheLethalCoder · Accepted Answer · 2017-07-13 16:25:13Z

4

C#, 80 78 bytes

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

edited Jul 13, 2017 at 16:25

answered Jul 13, 2017 at 16:03

TheLethalCoder

7,20927 silver badges43 bronze badges

1

\$\begingroup\$ I think the most readable language here is C# \$\endgroup\$
– sepehr
Jul 14, 2017 at 16:52
2

\$\begingroup\$ @sepehr You mean you see sharp with C#. (Do I get a bonus for dumb comments) \$\endgroup\$
– Ray
Jul 15, 2017 at 9:43

Add a comment |

Community · Accepted Answer · 2020-06-17 09:04:33Z

4

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.

edited Jun 17, 2020 at 9:04

CommunityBot

1

answered Jul 13, 2017 at 16:38

Mark

2311 silver badge4 bronze badges

\$\begingroup\$ I believe that you can replace the Searches with Finds for -2 bytes and that that could be further translated to a google sheets formula for -3 bytes by not closing the last three parens \$\endgroup\$
– Taylor Raine
Jul 13, 2017 at 21:19
1

\$\begingroup\$ Find is case sensitive, search is case insensitive. But those last 3 bytes are a good idea! \$\endgroup\$
– Mark
Jul 13, 2017 at 21:29
\$\begingroup\$ Why the swap from Excel to Google Sheets? \$\endgroup\$
– Stevoisiak
Jul 13, 2017 at 23:09
2

\$\begingroup\$ Removing the last 3 parens saves 3 bytes. Excel would just throw an error and put them in for you anyways. \$\endgroup\$
– Mark
Jul 13, 2017 at 23:39

Add a comment |

Dennis · Accepted Answer · 2017-07-13 23:07:07Z

4

Jelly, 27 bytes

,“Ẋṣ“®Ẓȷ»ŒlwÐ€/Ḅn2‘×3“¢Ẹị»ḣ

Try it online!

answered Jul 13, 2017 at 23:07

Dennis

210k41 gold badges370 silver badges823 bronze badges

Add a comment |

Ray · Accepted Answer · 2017-07-13 21:23:17Z

3

vim, 58 bytes

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

Try it online!

answered Jul 13, 2017 at 21:23

Ray

1,75713 silver badges14 bronze badges

\$\begingroup\$ I think using the g command might be a little shorter, something like :g/\cjavascript/d :g!/^\cjava/d icarpet␛:s/pet..*. \$\endgroup\$
– Neil
Jul 15, 2017 at 23:48

Add a comment |

Value Ink · Accepted Answer · 2017-07-14 00:49:27Z

3

Ruby, 42+1 = 43 bytes

Uses the -p flag.

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

Try it online!

edited Jul 14, 2017 at 0:49

answered Jul 13, 2017 at 23:31

Value Ink

12.6k1 gold badge17 silver badges42 bronze badges

Add a comment |

Dennis · Accepted Answer · 2017-07-14 05:38:01Z

3

Retina, 44 37 bytes

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

Thanks to @MartinEnder for golfing off 7 bytes!

Try it online!

edited Jul 14, 2017 at 5:38

answered Jul 13, 2017 at 21:12

Dennis

210k41 gold badges370 silver badges823 bronze badges

Add a comment |

Renzo · Accepted Answer · 2017-07-17 10:37:00Z

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

Dennis · Accepted Answer · 2017-07-14 19:05:48Z

2

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!

answered Jul 14, 2017 at 19:05

Dennis

210k41 gold badges370 silver badges823 bronze badges

Add a comment |

David Foerster · Accepted Answer · 2017-07-17 10:32:19Z

2

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");
}

edited Jul 17, 2017 at 10:32

David Foerster

4742 silver badges11 bronze badges

answered Jul 13, 2017 at 18:20

Steadybox

16.5k5 gold badges40 silver badges84 bronze badges

Add a comment |

Socratic Phoenix · Accepted Answer · 2017-07-13 23:15:58Z

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.

Wernisch · Accepted Answer · 2017-07-14 10:55:53Z

1

Excel, 84 bytes

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

answered Jul 14, 2017 at 10:55

Wernisch

3,0349 silver badges22 bronze badges

Add a comment |

Community · Accepted Answer · 2020-06-17 09:04:33Z

1

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")

edited Jun 17, 2020 at 9:04

CommunityBot

1

answered Jul 13, 2017 at 21:00

Taylor Raine

8,3662 gold badges25 silver badges48 bronze badges

1

\$\begingroup\$ Nice use of vba! I thought a macro would have been shorter. Now I have proof. \$\endgroup\$
– Mark
Jul 14, 2017 at 6:24

Add a comment |

Kavi · Accepted Answer · 2017-07-14 17:48:45Z

1

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!

answered Jul 14, 2017 at 17:48

Kavi

312 bronze badges

\$\begingroup\$ Always good to experiment :) Note that you can save bytes around operators like and, or, if, else \$\endgroup\$
– Luke Sawczak
Jul 14, 2017 at 18:31

Add a comment |

bytepusher · Accepted Answer · 2017-07-16 16:05:37Z

1

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'

edited Jul 16, 2017 at 16:05

answered Jul 16, 2017 at 12:07

bytepusher

1494 bronze badges

Add a comment |

Bart Jongejan · Accepted Answer · 2019-11-02 09:20:03Z

1

Bracmat, 66 bytes

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

Try it online!

edited Nov 2, 2019 at 9:20

answered Nov 2, 2019 at 9:11

Bart Jongejan

1513 bronze badges

Add a comment |

bigyihsuan · Accepted Answer · 2023-02-01 18:47:55Z

1

Go, 134 bytes

import."strings"
func f(s string)string{T,o:=ToLower,"car"
if Contains(T(s),"javascript")||!HasPrefix(T(s),"java"){o+="pet"}
return o}

Attempt This Online!

answered Feb 1, 2023 at 18:47

bigyihsuan

9,3481 gold badge20 silver badges60 bronze badges

Add a comment |

Kamila Szewczyk · Accepted Answer · 2023-11-13 17:10:58Z

1

Lua, 88 bytes

s=io.read():lower()print(s:sub(1,4)=='java'and not s:find'javascript'and'car'or'carpet')

Attempt This Online!

edited Nov 13, 2023 at 17:10

answered Nov 11, 2023 at 21:55

Kamila Szewczyk

12.4k1 gold badge29 silver badges60 bronze badges

\$\begingroup\$ Fails for input Javascript, but moving the call to :lower() to just after io.read() seems to fix it. Also, you can save 3 bytes by removing the whole concatenation of 'car' and just doing and'car'or'carpet'. \$\endgroup\$
– noodle man
Nov 12, 2023 at 0:40
\$\begingroup\$ Just FYI this is still wrong after your edit, the :lower() needs to be moved to just after io.read() so cases like JAVASCRIPTING -> carpet work correctly \$\endgroup\$
– noodle man
Nov 12, 2023 at 16:47

Add a comment |

noodle man · Accepted Answer · 2024-01-07 22:21:25Z

GolfScript, 53 49 44 bytes

{32|}%"java"/(,\{6<"script"=+}/"carpet".3<if

Try it online!

This was my second GolfScript submission so after writing a couple more I was able to revisit this and shave a couple bytes.

Previously, this mapped over a list, then summed it, then added it to a base value. Now, it just loops over the list, adding to the base value on each iteration.

Here's an explanation of how the code works:

{32|}%           # Convert the string to lowercase

"java"/          # Split on "java".
(,               # Extract the first item, and push its length
                 # (0 iff string starts with java).
\                # Swap so the rest of the list is on top of the stack.

{6<"script"=+}/  # Check if any start with "script":
{            }/  #   Loop over each item:
 6<              #     Take the first 6 characters.
   "script"=     #     Are they equal to "script"? (0 or 1)
            +    #     Add this to the top of the stack.

# After this loop, the stack will be 0 iff the string started
# with "java" and does not contain "javascript".

"carpet".3<     # Push "carpet" and its first 3 characters.
if              # If the value is 0, "car", otherwise "carpet".

Community · Accepted Answer · 2020-06-17 09:04:33Z

0

Mathematica, 82 bytes

regex

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

edited Jun 17, 2020 at 9:04

CommunityBot

1

answered Jul 13, 2017 at 16:52

ZaMoC

24.9k2 gold badges30 silver badges81 bronze badges

Add a comment |

Neil · Accepted Answer · 2017-07-15 23:57:24Z

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.

IS4 · Accepted Answer · 2017-07-16 12:40:21Z

0

Lua, 96 bytes

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

answered Jul 16, 2017 at 12:40

IS4

1073 bronze badges

Add a comment |

Burgan · Accepted Answer · 2017-07-16 16:55:29Z

0

Perl, 98 84 62 Bytes

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

Try it online!

Thanks to bytepusher

edited Jul 16, 2017 at 16:55

answered Jul 13, 2017 at 17:56

Burgan

1012 bronze badges

\$\begingroup\$ Welcome to the site! I don't know any perl, but it looks like there is a lot of whitespace you could remove. Also, if you're looking for more ways to shorten it, there's a bunch of tips here. \$\endgroup\$
– DJMcMayhem
Jul 13, 2017 at 18:04
\$\begingroup\$ @DJMcMayhem Thank you, I think the entire logic can be changed to make it even shorter, but I haven't figured it out \$\endgroup\$
– Burgan
Jul 13, 2017 at 18:28
1

\$\begingroup\$ Just some hints (without changing your solution too much): You can replace the return $b; with just $b;. Perl always returns the last evaluated statement. Since we don't care about warnings, you can even drop the ';' to $b}. You don't need the brackets around the if. If you use || instead of or, you can save a whitespace after the regex. \$\endgroup\$
– bytepusher
Jul 16, 2017 at 15:45
1

\$\begingroup\$ You can also remove the () around the first lc, but need a space after if then. If you use !~ instead of ! =~ the second condition can be lc$_[0]!~. ` -> sub a{$b="car";$b.="pet"if lc$_[0]=~/javascript/||lc$_[0]!~/^java/;$b}. Using the ternary ops brings it down one more sub a{$b="car";$b.="pet"if lc$_[0]=~/javascript/||lc$_[0]!~/^java/;$b} \$\endgroup\$
– bytepusher
Jul 16, 2017 at 15:53
1

\$\begingroup\$ Not to forget - no need for lc when you have the regex ignore case switch, down another 2 :) $_[0] =~//i||$_[0]!~//i. And finally, why a variable? sub a{"car".($_[0]=~/javascript/i||$_[0]!~/^java/i?'pet':'');} should do fine :). And now: perl will be nice and let you use $_[0] w/o specifying it (though not with !~): sub a{"car".(/javascript/i||!/^java/i?'pet':'')} -> 48 :) \$\endgroup\$
– bytepusher
Jul 16, 2017 at 15:58

Add a comment |

Community · Accepted Answer · 2020-06-17 09:04:33Z

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.

Community · Accepted Answer · 2020-06-17 09:04:33Z

0

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 :)

edited Jun 17, 2020 at 9:04

CommunityBot

1

answered Jul 17, 2017 at 10:37

f4bi4n

1

Add a comment |

Java is to JavaScript as Car is to Carpet

Introduction

Challenge

Example Input and Output

car:

carpet:

Notes

33 Answers 33

Java/JavaScript Polyglot, 108 107 106 bytes

Run as Java

Run as JavaScript

JavaScript, 50 49 bytes

Test snippet

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

C (only calling puts), 131 bytes

05AB1E, 21 bytes

Python 2, 68 bytes

C#, 80 78 bytes

EXCEL Google Sheets, 89 86 Bytes

Explanation

Jelly, 27 bytes

vim, 58 bytes

Ruby, 42+1 = 43 bytes

Retina, 44 37 bytes

Common Lisp, 131 125 bytes

Python 2, 69 bytes

C (tcc), 144 136 bytes

JAISBaL, 36 bytes

Excel, 84 bytes

Excel VBA, 76 Bytes

Python 3, 95 bytes

Perl, 42 bytes

Bracmat, 66 bytes

Go, 134 bytes

Lua, 88 bytes

GolfScript, 53 49 44 bytes

Mathematica, 82 bytes

Batch, 91 bytes

Lua, 96 bytes

Perl, 98 84 62 Bytes

Dart VM, 104 bytes 102 bytes

Rust, 97 bytes

Your Answer

Sign up or log in

Post as a guest

Not the answer you're looking for? Browse other questions tagged code-golfstringdecision-problempattern-matching or ask your own question.

Linked

Related

Hot Network Questions

Not the answer you're looking for? Browse other questions tagged
code-golf
string
decision-problem
pattern-matching
or ask your own question.