# README

ER - re regexp

version license

🛠 Installation

As Executable

If you have go in your system, what you need to do just use go get
```
go get -u github.com/unbyte/er/cmd/er
er --help
```
In other case, you need go to download executable in Release Page, and then rename the executable to er ( or er.exe on window ).

As Package

If you want to use er as a go package, please go get -u github.com/unbyte/er.

🎨 Usage

As Executable

> er --help
Usage of ER CLI:
  -a, -amount int
        amount of strings to be generated. default to 1. (default 1)
  -p, -pattern string
        pattern string

Syntax: https://golang.org/pkg/regexp/syntax/
Unicode Class: https://en.wikipedia.org/wiki/Unicode_character_property

> er -p "\d{3}-\d{8}|\d{4}-\d{7}" -a 10
454-16390004
0913-1976506
543-75125853
280-27961072
5049-7522609
7833-1752530
822-89737417
7176-8019427
5181-6167904
090-60481568

> er -p "[😂-😍]+"
😇😅😋😊😃😉😊😂😆😍😊😈😍😇😍😄😇😍😂😆😉😌😅😅😊😃😃😇😂😌😉😋😉😆😆😂😄😍😂😍😇😄😃😄😂😈😂😌😉😌😅😇😂

You can get the syntax of regexp here

and get all unicode groups here

As Package

import (
    "github.com/unbyte/er"
    "regexp/syntax"
)
func main(){
    pattern := "^[A-Za-z_]{10,14}$"
    generator, err := er.Parse(pattern, syntax.Perl)
    if err != nil {
        panic(err)
    }

    s, err := generator.Generate()
    if err != nil {
        panic(err)
    }
    fmt.Println(s)

    ss, err := generator.GenerateMultiple(10)
    if err != nil {
        panic(err)
    }
    fmt.Println(strings.Join(ss, "\n"))
}