55* @param {string } baseTwoCharacters Character set for the output base
66* @returns {string }
77*/
8- const convertArbitraryBase = ( stringInBaseOne , baseOneCharacters , baseTwoCharacters ) => {
9- if ( [ stringInBaseOne , baseOneCharacters , baseTwoCharacters ] . map ( arg => typeof arg ) . some ( type => type !== 'string' ) ) {
8+ const convertArbitraryBase = ( stringInBaseOne , baseOneCharacterString , baseTwoCharacterString ) => {
9+ if ( [ stringInBaseOne , baseOneCharacterString , baseTwoCharacterString ] . map ( arg => typeof arg ) . some ( type => type !== 'string' ) ) {
1010 throw new TypeError ( 'Only string arguments are allowed' )
1111 }
12- [ baseOneCharacters , baseTwoCharacters ] . forEach ( baseString => {
13- const charactersInBase = [ ...baseString ]
12+ 13+ const baseOneCharacters = [ ...baseOneCharacterString ]
14+ const baseTwoCharacters = [ ...baseTwoCharacterString ]
15+ 16+ for ( const charactersInBase of [ baseOneCharacters , baseTwoCharacters ] ) {
1417 if ( charactersInBase . length !== new Set ( charactersInBase ) . size ) {
1518 throw new TypeError ( 'Duplicate characters in character set are not allowed' )
1619 }
17- } )
20+ }
1821 const reversedStringOneChars = [ ...stringInBaseOne ] . reverse ( )
1922 const stringOneBase = baseOneCharacters . length
2023 let value = 0
@@ -31,11 +34,11 @@ const convertArbitraryBase = (stringInBaseOne, baseOneCharacters, baseTwoCharact
3134 const stringTwoBase = baseTwoCharacters . length
3235 while ( value > 0 ) {
3336 const remainder = value % stringTwoBase
34- stringInBaseTwo = baseTwoCharacters . charAt ( remainder ) + stringInBaseTwo
37+ stringInBaseTwo = baseTwoCharacters . at ( remainder ) + stringInBaseTwo
3538 value /= stringTwoBase
3639 }
37- const baseTwoZero = baseTwoCharacters . charAt ( 0 )
38- return stringInBaseTwo . replace ( new RegExp ( `^${ baseTwoZero } ) , '' )
40+ const baseTwoZero = baseTwoCharacters . at ( 0 )
41+ return stringInBaseTwo . replace ( new RegExp ( `^${ baseTwoZero } , 'u' ) , '' )
3942}
4043
4144export { convertArbitraryBase }
@@ -48,3 +51,6 @@ export { convertArbitraryBase }
4851
4952// > convertArbitraryBase('129', '0123456789', '01234567')
5053// '201'
54+ 55+ // > convertArbitraryBase('98', '0123456789', '💝🎸🦄')
56+ // '🎸💝🎸🦄🦄'
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