Package Exports

expand-range

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Readme

expand-range

Faster, bash-like range expansion. Expand a range of numbers or letters, uppercase or lowercase. See the benchmarks.

Benchmarks

node benchmark

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 third or fourth argument:

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

Install

Install with npm:

npm i expand-range --save-dev

Run tests

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 November 25, 2014.