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1.6 KiB
---
output: rmarkdown::github_document
---
# ulid
Universally Unique Lexicographically Sortable Identifier
## Description
(grifted from <https://github.com/ulid/spec>)
UUID can be suboptimal for many uses-cases because:
- It isn't the most character efficient way of encoding 128 bits of randomness
- UUID v1/v2 is impractical in many environments, as it requires access to a unique, stable MAC address
- UUID v3/v5 requires a unique seed and produces randomly distributed IDs, which can cause fragmentation in many data structures
- UUID v4 provides no other information than randomness which can cause fragmentation in many data structures
Instead, herein is proposed ULID:
```javascript
ulid() // 01ARZ3NDEKTSV4RRFFQ69G5FAV
```
- 128-bit compatibility with UUID
- 1.21e+24 unique ULIDs per millisecond
- Lexicographically sortable!
- Canonically encoded as a 26 character string, as opposed to the 36 character UUID
- Uses Crockford's base32 for better efficiency and readability (5 bits per character)
- Case insensitive
- No special characters (URL safe)
- Monotonic sort order (correctly detects and handles the same millisecond)
## What's Inside The Tin
The following functions are implemented:
- `ULIDgenerate`: Generate a time-based ULID
## Installation
```{r eval=FALSE}
devtools::install_github("hrbrmstr/ulid")
```
```{r message=FALSE, warning=FALSE, error=FALSE, include=FALSE}
options(width=120)
```
## Usage
```{r message=FALSE, warning=FALSE, error=FALSE}
library(ulid)
# current verison
packageVersion("ulid")
```
### One
```{r}
ulid::ULIDgenerate()
```
### Many
```{r}
ulid::ULIDgenerate(20)
```