Download Radix 64 Bits
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Description Fast and efficient integer conversion library for arbitrary radix 64 alphabets designed. Allows you to convert any size integer to and from any 64 radix alphabet. Has options to format strings so that they are lexicographically sortable. This library was designed for ID generation.
Note: While similar radix64 is not the same as base64. Base64 is for converting binary data and so starts converting from the most significant byte to least. Radix64 is for converting integers from base 10 to base 64 and so starts converting with the least significant byte to most. With radix64 you can generate encoded strings of any length whereas base64 must always have encoded strings with a length that is a multiple of 4.
Therefore radix64 doesn't need padding characters and can more efficiently represent the bits. Example Decimal Radix64 Base64 0 - AA== 1 0 AQ== 2 1 Ag== 4 3 BA== 8 7 CA== 16 F EA== 32 V IA== 64 0- QA== 128 1- gA== 256 3- AQA= 512 7- AgA= 1024 F- BAA= 2048 V- CAA= 4096 0-- EAA= # Usage. Var radix64 = require ( ' radix-64 ' ) ( ); radix64.encodeBuffer(buffer[, length]) Encodes a buffer into a radix 64 string. Download Lagu Slank Selamat Ulang Tahun Stafa Band more. • buffer - binary buffer • length [Optional] - Length of the desired encoded string. If not specified uses the minimum length needed to encode the buffer. Radix64.encodeInt(integer[, length]) Encodes an integer into a radix 64 string. • integer - Javascript integer • length [Optional] - Length of the desired encoded string.
If not specified uses the minimum length needed to encode the integer. Radix64.decodeToInt(string[, bytes]) Decodes a radix 64 string to a buffer • string - radix 64 string • bytes [Optional] - Int of bytes of the desired decoded buffer. If not specified uses the minimum bytes needed to decode the string. Radix64.decodeToBuffer(string) Decodes a radix 64 string to an integer • string - radix 64 string ### Lexicographical Sorting If you want lexicographically sortable encoded integers, you need to specify an encoded string length. This will prepend the integers with leading characters to make sure all the encoded integers are the same length so that they can be compared lexicographically.
```js var radix64 = require('radix-64')(); var encoded = radix64.encodeInt(); console.log('%s', encoded); // 08_VAH var encodedLexicographically = radix64.encodeInt(, 10); console.log('%s', encodedLexicographically); // ----08_VAH. Var decodedNum = bignum.fromBuffer(decoded); ### Custom Alphabets The default alphabet used is a lexicographically sorted base 64 URL alphabet. However you can specify any alphabet by passing a 64 character string to the function.
If you want your alphabet to be lexicographically sortable make sure to sort the characters. ```js var LEXICOGRAPHICAL_BASE64_URL = '-ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz'.split('). Brinkmann B 169 Manual Lymphatic Drainage. sort().join('); // Ensure in sorted order var radix64 = require('radix-64')(alphabet); ``` # Performance Benchmarks on an Amazon EC2 micro-2 instance.