DAY45：Decode the Morse code, advanced

題目連結

https://www.codewars.com/kata/54b72c16cd7f5154e9000457

解法

function decodeMorse(morseCode) {
    let arr = morseCode.trim().split('   ')
    let word = arr
        .map(code =>
            code.split(' ')
                .map(char =>
                    MORSE_CODE[char]
                ).join('')
        )
        .join(' ')

    return word
}

function decodeBits(bits) {
    bits = bits.replace(/(^0+|0+$)/g, '') 

    let min = bits.match(/0+|1+/g).map(b => b.length) 
    let rate = Math.min(...min)

    let result = bits
        .replace(new RegExp('0'.repeat(7 * rate), 'g'), '   ')
        .replace(new RegExp('0'.repeat(3 * rate), 'g'), ' ')
        .replace(new RegExp('1'.repeat(3 * rate), 'g'), '-')
        .replace(new RegExp('1'.repeat(1 * rate), 'g'), '.')
        .replace(new RegExp('0'.repeat(1 * rate), 'g'), '')

    return result
}