create lexicographic string keys for positive integers without zero-padding
npm install lexicographic-integercreate lexicographic string keys for positive integers without zero-padding
Note: there is some loss of precision for very large values (> 2^32)
`` js`
var convert = require('lexicographic-integer');
console.log(convert(12345));
output:
`
[ 252, 47, 62 ]
` js
var convert = require('lexicographic-integer');
for (var n = 0; n < 5; n++) {
console.log(n, convert(n, 'hex'));
}
console.log('...');
for (var n = 248; n < 257; n++) {
console.log(n, convert(n, 'hex'));
}
console.log('...');
for (var n = 5000; n < 5005; n++) {
console.log(n, convert(n, 'hex'));
}
console.log('...');
for (var n = 21378213; n < Number.MAX_VALUE; n *= 1513254198219212) {
console.log(n, convert(n, 'hex'));
}
`
output:
`
0 '00'
1 '01'
2 '02'
3 '03'
4 '04'
...
248 'f8'
249 'f9'
250 'fa'
251 'fb00'
252 'fb01'
253 'fb02'
254 'fb03'
255 'fb04'
256 'fb05'
...
5000 'fc128d'
5001 'fc128e'
5002 'fc128f'
5003 'fc1290'
5004 'fc1291'
...
21378213 'fe014633aa'
3.2350670572674536e+22 'ff2afedb3776c0'
4.895478805930646e+37 'ff5dfe935164a0'
7.408103855367726e+52 'ff8ffec6004cb6'
1.121034425997914e+68 'ffc2fe850f8af8'
1.696410051489608e+83 'fff4feb2d6c188'
2.5670996323179187e+98 'fffb2bfef05dd80e'
3.884674295852086e+113 'fffb5efea187f6ca'
5.87849968691243e+128 'fffb90fed91aaefe'
8.895664330450558e+143 'fffbc3fe91e5fa5b'
1.3461401394003201e+159 'fffbf5fec417daf6'
2.03705221733893e+174 'fffc0128fe83c74c6d'
3.08257781987989e+189 'fffc015afeb11d9526'
4.6647238272706696e+204 'fffc018cfeee0ce3b1'
7.058912915150531e+219 'fffc01bffe9ff97c9f'
1.0681929603715358e+235 'fffc01f1fed7031d45'
1.6164474817904348e+250 'fffc0224fe907e1097'
2.4460959380202488e+265 'fffc0256fec2341e25'
3.701564947456103e+280 'fffc0289fe828237a0'
5.601408696719025e+295 'fffc02bbfeaf68a916'
` js`
var convert = require('lexicographic-integer')
If encoding is undefined or 'array', return an array of byte valuesn
between 0 and 255, inclusive for the integer .
If encoding is 'hex', return a lexicographic hex string for the integer n.
With npm do:
`
npm install lexicographic-number
MIT