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# ulid
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Universally Unique Lexicographically Sortable Identifier
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## Description
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(grifted from <https://github.com/ulid/spec>)
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UUID can be suboptimal for many uses-cases because:
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- It isn’t the most character efficient way of encoding 128 bits of
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randomness
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- UUID v1/v2 is impractical in many environments, as it requires
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access to a unique, stable MAC address
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- UUID v3/v5 requires a unique seed and produces randomly distributed
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IDs, which can cause fragmentation in many data structures
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- UUID v4 provides no other information than randomness which can
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cause fragmentation in many data structures
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Instead, herein is proposed ULID:
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``` javascript
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ulid() // 01ARZ3NDEKTSV4RRFFQ69G5FAV
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```
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- 128-bit compatibility with UUID
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- 1.21e+24 unique ULIDs per millisecond
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- Lexicographically sortable\!
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- Canonically encoded as a 26 character string, as opposed to the 36
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character UUID
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- Uses Crockford’s base32 for better efficiency and readability (5
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bits per character)
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- Case insensitive
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- No special characters (URL safe)
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- Monotonic sort order (correctly detects and handles the same
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millisecond)
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## What’s Inside The Tin
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The following functions are implemented:
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- `ULIDgenerate`: Generate a time-based ULID
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## Installation
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``` r
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devtools::install_github("hrbrmstr/ulid")
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```
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## Usage
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``` r
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library(ulid)
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# current verison
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packageVersion("ulid")
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```
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## [1] '0.1.0'
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### One
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``` r
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ulid::ULIDgenerate()
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```
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## [1] "0001E2CNHEB71VBCP6Y1M3RAGR"
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### Many
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``` r
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ulid::ULIDgenerate(20)
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```
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## [1] "0001E2CNHEVGN75257V2TZBSBD" "0001E2CNHE7WRWS5HB52XHCK0X" "0001E2CNHEATMJ0TNJK0D7R9NV" "0001E2CNHE3GS9WDYF9V45YRVG"
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## [5] "0001E2CNHEJ4NZPP9TB4K53Z8B" "0001E2CNHE383ZMKDRPNR8N9B0" "0001E2CNHEYPRFKC6BBXXGZ8TK" "0001E2CNHEQK1M8FZKDGPG32TS"
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## [9] "0001E2CNHECVSY4VD69NMT8JNK" "0001E2CNHEEVPNZTXZ9QA66DRK" "0001E2CNHESEDDC41ETPJJWN8C" "0001E2CNHEZ4D0D9XGAV2AK5TA"
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## [13] "0001E2CNHEZF13W414M0AKYKX8" "0001E2CNHEVKZ4WQZTFH4FBX4D" "0001E2CNHE69545C9DN9A29EP8" "0001E2CNHEJMDHYHFW3FBTZG5X"
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## [17] "0001E2CNHEN9EZ4HHZCS3NQ9C0" "0001E2CNHEWR1SWBEPG69PDHXN" "0001E2CNHEVEPE5P2K5DNHB6CT" "0001E2CNHE8WX898BTPG3EJMQN"
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