Package Exports

expand-range

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Readme

expand-range

Fast, bash-like range expansion. Expand a range of numbers or letters, uppercase or lowercase. See the benchmarks. Used by micromatch.

Install with npm

npm i expand-range --save

Wraps fill-range to do range expansion using .. separated strings. See fill-range for the full list of options and features.

Example usage

var expand = require('expand-range');

Params

expand(start, stop, increment);

start: the number or letter to start with
end: the number or letter to end with
increment: optionally pass the increment to use. works for letters or numbers

Examples

expand('1..3')
//=> ['1', '2', '3']

expand('1..3')
//=> ['1', '2', '3']

expand('0..-5')
//=> [ '0', '-1', '-2', '-3', '-4', '-5' ]

expand('-9..9..3')
//=> [ '-9', '-6', '-3', '0', '3', '6', '9' ])

expand('-1..-10..-2')
//=> [ '-1', '-3', '-5', '-7', '-9' ]

expand('1..10..2')
//=> [ '1', '3', '5', '7', '9' ]

expand('a..e')
//=> ['a', 'b', 'c', 'd', 'e']

expand('a..e..2')
//=> ['a', 'c', 'e']

expand('A..E..2')
//=> ['A', 'C', 'E']

Custom function

Optionally pass a custom function as the second argument:

expand('a..e', function (val, isNumber, pad, i) {
  if (!isNumber) {
    return String.fromCharCode(val) + i;
  }
  return val;
});
//=> ['a0', 'b1', 'c2', 'd3', 'e4']

Benchmarks

node benchmark

Run tests

Install dev dependencies

npm i -d && npm test

Contributing

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.

Author

Jon Schlinkert

License

This file was generated by verb on January 24, 2015.