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Fill in a range of numbers or letters, optionally passing an increment or multiplier to use.
Please consider following this project's author, Jon Schlinkert, and consider starring the project to show your :heart: and support.
(TOC generated by verb using markdown-toc)
Install with npm:
$ npm install --save fill-range
var range = require('fill-range');
range('a', 'e');
//=> ['a', 'b', 'c', 'd', 'e']
Params
range(start, stop, step, options, fn);
start
: {String|Number} the number or letter to start withend
: {String|Number} the number or letter to end withstep
: {String|Number} optionally pass the step to use. works for letters or numbers.options
: {Object}:
makeRe
: return a regex-compatible string (still returned as an array for consistency)step
: pass the step on the options as an alternative to passing it as an argumentsilent
: true
by default, set to false to throw errors for invalid ranges.fn
: {Function} optionally pass a function to modify each characterExamples
range(1, 3)
//=> ['1', '2', '3']
range('1', '3')
//=> ['1', '2', '3']
range('0', '-5')
//=> [ '0', '-1', '-2', '-3', '-4', '-5' ]
range(-9, 9, 3)
//=> [ '-9', '-6', '-3', '0', '3', '6', '9' ])
range('-1', '-10', '-2')
//=> [ '-1', '-3', '-5', '-7', '-9' ]
range('1', '10', '2')
//=> [ '1', '3', '5', '7', '9' ]
range('a', 'e')
//=> ['a', 'b', 'c', 'd', 'e']
range('a', 'e', 2)
//=> ['a', 'c', 'e']
range('A', 'E', 2)
//=> ['A', 'C', 'E']
When an invalid range is passed, null
is returned.
range('1.1', '2');
//=> null
range('a', '2');
//=> null
range(1, 10, 'foo');
//=> null
If you want errors to be throw, pass silent: false
on the options:
Optionally pass a custom function as the third or fourth argument:
range('a', 'e', function (val, isNumber, pad, i) {
if (!isNumber) {
return String.fromCharCode(val) + i;
}
return val;
});
//=> ['a0', 'b1', 'c2', 'd3', 'e4']
A special character may be passed as the third arg instead of a step increment. These characters can be pretty useful for brace expansion, creating file paths, test fixtures and similar use case.
range('a', 'z', SPECIAL_CHARACTER_HERE);
Supported characters
+
: repeat the given string n
times|
: create a regex-ready string, instead of an array>
: join values to single array element?
: randomize the given pattern using [randomatic]Character: (+
)
Repeat the first argument the number of times passed on the second argument.
Examples:
range('a', 3, '+');
//=> ['a', 'a', 'a']
range('abc', 2, '+');
//=> ['abc', 'abc']
Characters: (|
and ~
)
Creates a regex-capable string (either a logical or
or a character class) from the expanded arguments.
Examples:
range('a', 'c', '|');
//=> ['(a|b|c)'
range('a', 'c', '~');
//=> ['[a-c]'
range('a', 'z', '|5');
//=> ['(a|f|k|p|u|z)'
Automatic separator correction
To avoid this error:
Range out of order in character class
Fill-range detects invalid sequences and uses the correct syntax. For example:
invalid (regex)
If you pass these:
range('a', 'z', '~5');
// which would result in this
//=> ['[a-f-k-p-u-z]']
range('10', '20', '~');
// which would result in this
//=> ['[10-20]']
valid (regex)
fill-range corrects them to this:
range('a', 'z', '~5');
//=> ['(a|f|k|p|u|z)'
range('10', '20', '~');
//=> ['(10-20)'
Character: (>
)
Joins all values in the returned array to a single value.
Examples:
range('a', 'e', '>');
//=> ['abcde']
range('5', '8', '>');
//=> ['5678']
range('2', '20', '2>');
//=> ['2468101214161820']
Character: (?
)
Uses [randomatic] to generate randomized alpha, numeric, or alpha-numeric patterns based on the provided arguments.
Examples:
(actual results would obviously be randomized)
Generate a 5-character, uppercase, alphabetical string:
range('A', 5, '?');
//=> ['NSHAK']
Generate a 5-digit random number:
range('0', 5, '?');
//=> ['36583']
Generate a 10-character alpha-numeric string:
range('A0', 10, '?');
//=> ['5YJD60VQNN']
See the [randomatic] repo for all available options and or to create issues or feature requests related to randomization.
You might also be interested in these projects:
true
if the given string looks like a glob pattern or an extglob pattern… more | homepage| Commits | Contributor | | --- | --- | | 111 | jonschlinkert | | 2 | paulmillr | | 1 | edorivai | | 1 | realityking | | 1 | wtgtybhertgeghgtwtg |
Jon Schlinkert
Copyright © 2018, Jon Schlinkert. Released under the MIT License.
This file was generated by verb-generate-readme, v0.6.0, on May 08, 2018.