Daily Challenge 100 - Round Up

.removeFirstAndLastLetter {  background: #fff;  font-family: monospace;  white-space: nowrap;  position: relative;  display: inline-block;}.removeFirstAndLastLetter::before,.removeFirstAndLastLetter::after {  content: "\00a0";  background: #fff;  top: 0;  display: block;  position: absolute;  height: 100%;  width: auto;}.removeFirstAndLastLetter::after {  right: 0;}

likes :: [String] -> Stringlikes []        = "no one likes this"likes [a]       = a ++ " likes this"likes [a, b]    = a ++ " and " ++ b ++ " like this"likes [a, b, c] = a ++ ", " ++ b ++ " and " ++ c ++ " like this"likes (a:b:xs)  = a ++ ", " ++ b ++ " and " ++ (show $ length xs) ++ " others like this"

const convertIPStringToNumber = ipString => ipString.split(".")    .reduce((acc, part) => (acc << 8) | Number(part), 0);const ipsBetween = (start, finish) =>     Math.abs(convertIPStringToNumber(finish) - convertIPStringToNumber(start));

package find// MissingLetter indicates what the missing character is in a ordered sequence of charactersfunc MissingLetter(chars []rune) rune {    var last int    for _, r := range chars {        if last != 0 && int(r)-last > 1 {            return rune(r - 1)        }        last = int(r)    }    return rune(last)}

package findimport "testing"type testCase struct {    description string    input       []rune    expected    rune}func TestMissingLetter(t *testing.T) {    testCases := []testCase{        {            "two characters",            []rune{'A', 'C'},            'B',        },        {            "dev-to example one",            []rune{'a', 'b', 'c', 'd', 'f'},            'e',        },        {            "dev-to example two",            []rune{'O', 'Q', 'R', 'S'},            'P',        },    }    for _, test := range testCases {        if result := MissingLetter(test.input); result != test.expected {            t.Fatalf("FAIL: %s - MissingLetter(%+v): %v - expected %v", test.description, test.input, result, test.expected)        }        t.Logf("PASS: %s", test.description)    }}

f=(s)=>[...Array(26)].map((_,i)=>26-i).map(n=>`key: ${26-n}\ncipher: ${s}\nplain: ${[...s].map(l=>(a=l.charCodeAt(0),String.fromCharCode(a<123&&a>96?97+((a-97+n)%26):a))).join('')}`).join`\n---\n`

f('dwwdfn iurp wkh zrrgv dw gdzq');"key: 0cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: dwwdfn iurp wkh zrrgv dw gdzq---key: 1cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: cvvcem htqo vjg yqqfu cv fcyp---key: 2cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: buubdl gspn uif xppet bu ebxo---key: 3cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: attack from the woods at dawn---key: 4cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: zsszbj eqnl sgd vnncr zs czvm---key: 5cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: yrryai dpmk rfc ummbq yr byul---key: 6cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: xqqxzh colj qeb tllap xq axtk---key: 7cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: wppwyg bnki pda skkzo wp zwsj---key: 8cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: voovxf amjh ocz rjjyn vo yvri---key: 9cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: unnuwe zlig nby qiixm un xuqh---key: 10cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: tmmtvd ykhf max phhwl tm wtpg---key: 11cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: sllsuc xjge lzw oggvk sl vsof---key: 12cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: rkkrtb wifd kyv nffuj rk urne---key: 13cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: qjjqsa vhec jxu meeti qj tqmd---key: 14cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: piiprz ugdb iwt lddsh pi splc---key: 15cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: ohhoqy tfca hvs kccrg oh rokb---key: 16cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: nggnpx sebz gur jbbqf ng qnja---key: 17cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: mffmow rday ftq iaape mf pmiz---key: 18cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: leelnv qczx esp hzzod le olhy---key: 19cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: kddkmu pbyw dro gyync kd nkgx---key: 20cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: jccjlt oaxv cqn fxxmb jc mjfw---key: 21cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: ibbiks nzwu bpm ewwla ib liev---key: 22cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: haahjr myvt aol dvvkz ha khdu---key: 23cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: gzzgiq lxus znk cuujy gz jgct---key: 24cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: fyyfhp kwtr ymj bttix fy ifbs---key: 25cipher: dwwdfn iurp wkh zrrgv dw gdzqplain: exxego jvsq xli asshw ex hear"