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ileathan/base-x encoder gist

Last active January 29, 2018 00:39
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Continually mod and map.
Raw
base-x encoder gist
encode = (n, a) => {
var r = [];
do {
n = (n - (r[r.length] = n % a.length)) / a.length
} while(n);
return r.map(n=>a[n]).reverse().join('')
};
encode(4095, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/')
// Outputs "//"
encode(4095, '0123456789abcdef')
// Outputs "ffff"
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