# It's Not 2015 Anymore!

## The Rules

• Each submission must be a full program or a function.
• The program must take all instances of the string 2015 from the input (1 string), replace it with <s>2015</s>* (with <s> or <strike>). At the end, if there has been at least one 2015 in the string, you must add a newline and this string: *2016. I'm a year early!
• The program must not write anything to STDERR.
• The input will not contain <s>2015</s> or <strike>2015</strike>.

Note that there must be an interpreter so the submission can be tested.

• Submissions are scored in bytes, in an appropriate (pre-existing) encoding, usually (but not necessarily) UTF-8. Some languages, like Folders, are a bit tricky to score - if in doubt, please ask on Meta.
• This is , so shortest code wins

## Examples

Input:

Hello! The date is 2015-12-24.

Output:

Hello! The date is 2015*-12-24.
*2016. I'm a year early!

Input:

foo bar baz quux

Output:

foo bar baz quux

Input:

12320151203205120151294201511271823

Output:

1232015*120320512015*12942015*11271823
*2016. I'm a year early!

Input:

 Hello. The year is 2015...
2015.5...

Output:

 Hello. The year is 2015*...
2015*.5...
*2016. I'm a year early!

## The Snippet

The Stack Snippet at the bottom of this post generates the catalogue from the answers a) as a leaderboard and b) as a list of winners per language.

## Language Name, N bytes


where N is the size of your submission. If you improve your score, you can keep old scores in the headline, by striking them through. For instance:

## Ruby, <s>104</s> <s>101</s> 96 bytes


If there you want to include multiple numbers in your header (e.g. because your score is the sum of two files or you want to list interpreter flag penalties separately), make sure that the actual score is the last number in the header:

## Perl, 43 + 2 (-p flag) = 45 bytes


You can also make the language name a link which will then show up in the snippet:

## [><>](http://esolangs.org/wiki/Fish), 121 bytes


var QUESTION_ID=68372,OVERRIDE_USER=45162;function answersUrl(e){return"http://api.stackexchange.com/2.2/questions/"+QUESTION_ID+"/answers?page="+e+"&pagesize=100&order=desc&sort=creation&site=codegolf&filter="+ANSWER_FILTER}function commentUrl(e,s){return"http://api.stackexchange.com/2.2/answers/"+s.join(";")+"/comments?page="+e+"&pagesize=100&order=desc&sort=creation&site=codegolf&filter="+COMMENT_FILTER}function getAnswers(){jQuery.ajax({url:answersUrl(answer_page++),method:"get",dataType:"jsonp",crossDomain:!0,success:function(e){answers.push.apply(answers,e.items),answers_hash=[],answer_ids=[],e.items.forEach(function(e){e.comments=[];var s=+e.share_link.match(/\d+/);answer_ids.push(s),answers_hash[s]=e}),e.has_more||(more_answers=!1),comment_page=1,getComments()}})}function getComments(){jQuery.ajax({url:commentUrl(comment_page++,answer_ids),method:"get",dataType:"jsonp",crossDomain:!0,success:function(e){e.items.forEach(function(e){e.owner.user_id===OVERRIDE_USER&&answers_hash[e.post_id].comments.push(e)}),e.has_more?getComments():more_answers?getAnswers():process()}})}function getAuthorName(e){return e.owner.display_name}function process(){var e=[];answers.forEach(function(s){var r=s.body;s.comments.forEach(function(e){OVERRIDE_REG.test(e.body)&&(r="<h1>"+e.body.replace(OVERRIDE_REG,"")+"</h1>")});var a=r.match(SCORE_REG);a&&e.push({user:getAuthorName(s),size:+a[2],language:a[1],link:s.share_link})}),e.sort(function(e,s){var r=e.size,a=s.size;return r-a});var s={},r=1,a=null,n=1;e.forEach(function(e){e.size!=a&&(n=r),a=e.size,++r;var t=jQuery("#answer-template").html();t=t.replace("{{PLACE}}",n+".").replace("{{NAME}}",e.user).replace("{{LANGUAGE}}",e.language).replace("{{SIZE}}",e.size).replace("{{LINK}}",e.link),t=jQuery(t),jQuery("#answers").append(t);var o=e.language;/<a/.test(o)&&(o=jQuery(o).text()),s[o]=s[o]||{lang:e.language,user:e.user,size:e.size,link:e.link}});var t=[];for(var o in s)s.hasOwnProperty(o)&&t.push(s[o]);t.sort(function(e,s){return e.lang>s.lang?1:e.lang<s.lang?-1:0});for(var c=0;c<t.length;++c){var i=jQuery("#language-template").html(),o=t[c];i=i.replace("{{LANGUAGE}}",o.lang).replace("{{NAME}}",o.user).replace("{{SIZE}}",o.size).replace("{{LINK}}",o.link),i=jQuery(i),jQuery("#languages").append(i)}}var ANSWER_FILTER="!t)IWYnsLAZle2tQ3KqrVveCRJfxcRLe",COMMENT_FILTER="!)Q2B_A2kjfAiU78X(md6BoYk",answers=[],answers_hash,answer_ids,answer_page=1,more_answers=!0,comment_page;getAnswers();var SCORE_REG=/<h\d>\s*([^\n,]*[^\s,]),.*?([\d.]+)(?=[^\n\d<>]*(?:<(?:s>[^\n<>]*<\/s>|[^\n<>]+>)[^\n\d<>]*)*<\/h\d>)/,OVERRIDE_REG=/^Override\s*header:\s*/i;
body{text-align:left!important}#answer-list,#language-list{padding:10px;width:290px;float:left}table thead{font-weight:700}table td{padding:5px}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <link rel="stylesheet" type="text/css" href="//cdn.sstatic.net/codegolf/all.css?v=83c949450c8b"> <div id="answer-list"> <h2>Leaderboard</h2> <table class="answer-list"> <thead> <tr><td></td><td>Author</td><td>Language</td><td>Size</td></tr></thead> <tbody id="answers"> </tbody> </table> </div><div id="language-list"> <h2>Winners by Language</h2> <table class="language-list"> <thead> <tr><td>Language</td><td>User</td><td>Score</td></tr></thead> <tbody id="languages"> </tbody> </table> </div><table style="display: none"> <tbody id="answer-template"> <tr><td>{{PLACE}}</td><td>{{NAME}}</td><td>{{LANGUAGE}}</td><td>{{SIZE}}</td><td><a href="{{LINK}}">Link</a></td></tr></tbody> </table> <table style="display: none"> <tbody id="language-template"> <tr><td>{{LANGUAGE}}</td><td>{{NAME}}</td><td>{{SIZE}}</td><td><a href="{{LINK}}">Link</a></td></tr></tbody> </table>

• @downvoters what is wrong with this challenge? – ev3commander Jan 2 '16 at 1:41
• I find the challenge boring. It's a find-replace followed by a conditional concatenated string. Also, I don't like when functions are disallowed for no particular reason. – xnor Jan 2 '16 at 1:45
• Yes, but a challenge can be simple without being straightforward. Replacement or regex is a built-in in most langs. It means that's likely just the way to do it. – xnor Jan 2 '16 at 1:49
• Can we have any trailing whitespace? – Downgoat Jan 2 '16 at 2:30
• Not everyone agrees with @NBZ on that. And there are certainly more than enough trivial questions. If you post questions which have a negative score in the sandbox, don't be surprised to see them downvoted. – Peter Taylor Jan 2 '16 at 14:57

# Stax, 36 bytes

ç┼↕+∙n7↔Qq┼╩↓╣ÇÖú];ⁿX£╞bëi⌐ñ▼Z♀φ6╛(<


Run and debug it

Unpacked, ungolfed, and commented, it looks like this.

_               push all of standard input
2015X           push 2015 and store it in the x register
$/c split string on "2015", and copy the result "<s>x</s>*"*P join with "<s>2015</s>*" and print D!C stop executing if split resulted in more than 1 element '*p print "*" without newline |Xp increment x register and print without newline print unterminated compressed literal ". I'm a year early!" Q_RUWZ)O-C!  Run this one # JavaScript ES6, 84 76 75 bytes s=>(q=s.replace(/2015/g,"<s>$&</s>*"))+(s<q?
*2016. I'm a year early!:"")


This is pretty well golfed for JavaScript imo.

This works by taking the input and replacing all instances of 2015 with <s>$&</s>* where $& is the value matched, but in this case, that's always 2015. Then, if the input is different from q, it'll add the *2016... string, otherwise, It'll add a blank string (nothing).

• I think you can do (q!=s&&\n*2016. I'm a year early!) – Conor O'Brien Jan 2 '16 at 2:21
• @CᴏɴᴏʀO'Bʀɪᴇɴ That seems to add "false" to the string when the condition is false :( – Downgoat Jan 2 '16 at 2:28
• Oh, dangit. That's bad :P – Conor O'Brien Jan 2 '16 at 2:30
puts"*2016. I'm a year early!"if$&  # Jolf, 60 bytes Two parts, again. oHρi"2015"+pd"s'$&'*"
oH                    set H
ρi"2015"             to input string, replaced all 2015 with
pd"s'$&'$& crossed out. (pd is an apply tag function)
+        *" append an asterisk

v-- unprintable
+H|&?=Hi+S"*2016. I\'m a year early!'"
+H|&?=Hi                            '" add ↓ to H if H != i; otherwise add empty string ('")
+S"*2016. I\'m a year early!'  a newline plus that string
implicit printing


Try it here! Bonus points for actually crossing out the text and conforming to the output examples? :3

• Technically against the rules. +1. – wizzwizz4 Jan 2 '16 at 17:29

## Python, 97 bytes

a=raw_input();b=a.replace('2015','<s>2015</s>*');print a;
if a!=b:print"*2016. I'm a year early!"


This takes input from stdin, replaces any instances of 2015 with a strike, and prints the 2016 message if the two strings don't match.

• couldn't you use a<b instead of a!=b? – Cyoce Jan 2 '16 at 20:22

## Mathematica, 98 bytes

a="2015";StringReplace[#,a->"<s>2015</s>*"]<>If[#~StringCount~a>0,"
*2016. I'm a year early!",""]&


Once again, Mathematica's string processing uses many bytes...

## Pyth, 5251 50 bytes

I-
:z"2015""<s>2015</s>*"z." ytµbðï«»±é¢þnl¶Vû


# 𝔼𝕊𝕄𝕚𝕟, 49 chars / 93 bytes

a=ïę ḟ*ṁ,<s>$&</s>*”)+(a≠ï?ɘƂ联Ӏఈ쁬Πā␎䁛␐줄쁰ꖈᲠ䉠耀#:⬯  Try it here (Firefox only). Really straightforward. a=ïę ḟ*ṁ,'<s>$&</s>*”) nests all instances of 2015 (represented here as the result of 31*65) in strikethrough tags. Then, append the last string ('compressed' here) accordingly.

Y=Ur2015"<s>$&</s>*")¥U?U:Y+ *2016. I'm a ye e§!  Try it online! # TeaScript, 59 bytes (q=xg2015,"<s>$&</s>*"))+(x<q?
*2016. I'm a year early!:u


Try it online

## Explanation

(q=        // Assign q to...
xg      // input.replace
2015  // 2015 with.
"..." // The string

(x<q?      // If the input is different from replacement
"..." // Add string to the end
:u     // Otherwise empty string

• Downvote reason? This answer is perfectly valid, wth? – Downgoat Jan 2 '16 at 3:51
• They'll always downvote downgoat! – wizzwizz4 Jan 2 '16 at 17:31
• @wizzwizz4 :( Maybe Upgoat is having better luck – Downgoat Jan 2 '16 at 17:32
• How legal are sockpuppet accounts? – wizzwizz4 Jan 2 '16 at 17:34
• @wizzwizz4 I don't use them for evil, >:) just chatbots so it's fine. – Downgoat Jan 2 '16 at 17:36

# 05AB1E, 42 40 bytes

Ž7ç©åi®®"<s>ÿ</s>*".:®>“*ÿ. I'm€…‚Œ‰€!“»


Try it online!

-2 thanks to Grimy

## Explanation

Ž7ç©åi®®"<s>ÿ</s>*".:®>“*ÿ. I'm€…‚Œ‰€!“» Full Program
Ž7ç©                                     Pushes 2015 and copies it to the register
å                                    Checks if 2015 occurs in the input
i                                   If yes, do the following steps, else
finish and output the input
®®"<s>ÿ</s>*"                      Pushes 2015 and "<s>2015</s>*"
.:                    Replaces all instances of 2015 by
</s>2015</s> in the input
®>“*ÿ. I'm€…‚Œ‰€!“  Push "*2016. I'm a year early!"
» Concatenate both strings with a newline in between

• The » is not needed when there is no replacement, so you can just drop the } for -1. – Grimmy May 28 at 21:15
• – Grimmy May 28 at 21:37

## (f)lex, 104 bytes

File 2015.l:

 int n=0;
%%
"2015" ++n+puts("<s>2015</s>*");
%%
main(){yylex();n&&puts( "*2016. I'm a year early!\n");}


...no trailing newline.

Build:

$flex -o 2015.c 2015.l$ gcc 2015.c -o 2015 -lfl


Run:

$./2015 <<<'Hello! The date is 2015-12-24.' Hello! The date is <s>2015</s>*-12-24. *2016. I'm a year early!$ ./2015 <<<'foo bar baz quux'
foo bar baz quux
$./2015 <<<'12320151203205120151294201511271823' 123<s>2015</s>*12032051<s>2015</s>*1294<s>2015</s>*11271823 *2016. I'm a year early!  I ran this using flex and gcc on Debian8, but I see no reason why it should fail in other environments using lex and/or a different C compiler. • Note it may bail out due to integer overflow. – Krzysztof Szewczyk Aug 1 at 10:45 # C#, 152 bytes class A{static void Main(string[]a){System.Console.Write(a[0].Replace("2015","<s>2015</s>*")+(a[0].Contains("2015")?"\n*2016. I'm a year early!":""));}}  Basic solution. Takes the string as the first argument. # Gema, 57 bytes 2015=<s>$0</s>*@set{a;*2016. I'm a year early\!}
\Z=${a;}  Sample run: bash-4.3$ gema -f not-2015.gema <<< 'Hello! The date is 2015-12-24.'
Hello! The date is <s>2015</s>*-12-24.
*2016. I'm a year early!

bash-4.3$gema -f not-2015.gema <<< 'foo bar baz quux' foo bar baz quux bash-4.3$ gema -f not-2015.gema <<< '12320151203205120151294201511271823'
123<s>2015</s>*12032051<s>2015</s>*1294<s>2015</s>*11271823
*2016. I'm a year early!


# Retina, 49 45 64 61 60 54 bytes

s2015.+
$&¶*2016. I'm a year early! \2015 <s>$&</s>*


After numerous attempts I think this is the shortest Retina solution

The first line matches 2015, the second line replaces the previous match (2015) with <s>$&</s>* where $& is the match's value or in this case, 2015.

The \ removes the trailing newline from the output. The  starts the regex. $ matches the end specifying we're trying to add a string to the end. The last line simply adds the string where ¶ becomes a newline. Retina uses the ISO-8859-1 encoding in which the ¶ is one byte Try it online ## ROOP, 110 bytes  1I CW |%| V ! H ' "<s>2015</s>*" 2R ! 0 #V 1 G # 5V #"\n*2016. I'm a year early!" '| M # -V # #W O#  This uses the R operator to replace all occurrences of the string 2015 in the input to <s>2015</s>*.Then, there is a comparison -- if the input string and the new one are different, then 1 is returned. Otherwise, 0 is returned. Then, M repeats the string \n*2016. I'm a year early that many times, i.e. if there are no changes, the string is blank, otherwise, the string is \n*2016. I'm a year early. Then, the strings are printed and the program terminates. Above there is a 1 which is moved to the left and then falls to the operator H, which ends the program. • It should print "*2016. I'm a year early!" only once – ev3commander Jan 3 '16 at 23:27 • That's what it does. – DarkPhantom Jan 3 '16 at 23:29 • Oh. I misinterpreted the usage of M. – ev3commander Jan 3 '16 at 23:32 • Use 1 or 0, sorry, English is not my native language. Feel free to improve the text if necessary. – DarkPhantom Jan 3 '16 at 23:35 # PowerShell, 81 79 bytes -2 bytes thanks to mazzy param($n)($z=$n-replace2015,'<s>$&</s>*')+" *2016. I'm a year early!"*($z-ne$n)  Try it online! Just a replace on the input and a conditional append with the 2016 line. You don't need many quotes or spaces in PowerShell either. • 79 bytes :) – mazzy May 28 at 18:10 # Perl 5-p, 53 bytes $\="\n*2016. I'm a year early!"if s|2015|<s>\$&</s>*|g


Try it online!

# Python 3.8 (pre-release), 80 bytes

lambda x:(b:=x.replace('2015','<s>2015<s>*'))+"\n*2016. I'm a year early!"*(b>x)
`

Try it online!

Saved 8 bytes thanks to squid