incstr

incstr

Increment string or generate sequential string ids

Install: npm install incstr

Default alphabet is '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ', it can be changed by changingincstr.alphabet.

Pass a string to increment using default alphabet:

let i = incstr() //"0"
i = incstr(i) //"1"
//...
i = incstr(i) //"Z"
i = incstr(i) //"00", note not "10"
i = incstr(i) //"01"

Pass a string and alphabet to use:

incstr("a", "ab") //"b"
incstr("b", "ab") //"aa"
incstr("ccc", "abc") //"aaaa"
incstr("cc", "ab") //throws ('c' is not in alphabet 'ab')

Generate ids:

let nextId = incstr.idGenerator({alphabet:'abc'})
nextId() //'a'
nextId() //'b'
nextId() //'c'
nextId() //'aa'

let nextId = incstr.idGenerator({alphabet:'ab', prefix:'id_', suffix:''})
nextId() //'id_a'
nextId() //'id_b'
nextId() //'id_aa'

let nextId = incstr.idGenerator({lastId:'cc', alphabet:'abc'})
nextId() //'aaa'