underscore.string

Underscore.string

Idea: Esa-Matti Suuronen (esa-matti aet suuronen dot org)

Authors: Esa-Matti Suuronen, Edward Tsech

Javascript lacks complete string manipulation operations. This an attempt to fill that cap. List of buildin methods can be found for example from Dive Into JavaScript.

As name states this an extension for Underscore.js, but it can be used independently from _s-global variable. But with Underscore.js you can use Object-Oriented style and chaining:

_("   epeli  ").chain().trim().capitalize().value()
=> "Epeli"

Node.js installation

npm package

npm install underscore.string

Standalone usage:

var _s = require('undescore.string');

Integrate with Underscore.js:

var _  = require('underscore');
_.mixin(require('underscore.string'));

String Functions

capitalize _.capitalize(string)

Converts first letter of the string to uppercase.

_.capitalize("epeli")
=> "Epeli"

chop _.chop(string, step)

_.chop('whitespace', 3)
=> ['whi','tes','pac','e']

clean _.clean(str)

Compress some whitespaces to one.

_.clean(" foo    bar   ")
=> 'foo bar'

chars _.chars(str)

_.chars('Hello')
=> ['H','e','l','l','o']

includes _.includes(string, substring)

Tests if string contains a substring.

_.includes("foobar", "ob")
=> true

count _.count(string, substring)

_('Hello world').count('l')
=> 3

escapeHTML _.escapeHTML(string)

Converts HTML special characters to their entity equivalents.

_('<div>Blah blah blah</div>').escapeHTML();
=> '&lt;div&gt;Blah blah blah&lt;/div&gt;'

unescapeHTML _.unescapeHTML(string)

Converts entity characters to HTML equivalents.

_('<div>Blah blah blah</div>').unescapeHTML();
=> '<div>Blah blah blah</div>'

insert _.insert(string, index, substing)

_('Hello ').insert(6, 'world')
=> 'Hello world'

join _.join(separator, *strings)

Joins strings together with given separator

_.join(" ", "foo", "bar")
=> "foo bar"

lines _.lines(str)

_.lines("Hello\nWorld")
=> ["Hello", "World"]

reverse

This functions has been removed, because this function override underscore.js 'reverse'. But now you can do that:

_("foobar").chars().reverse().join('')

splice _.splice(string, index, howmany, substring)

Like a array splice.

_('https://edtsech@bitbucket.org/edtsech/underscore.strings').splice(30, 7, 'epeli')
=> 'https://edtsech@bitbucket.org/epeli/underscore.strings'

startsWith _.startsWith(string, starts)

This method checks whether string starts with starts.

_("image.gif").startsWith("image")
=> true

endsWith _.endsWith(string, ends)

This method checks whether string ends with ends.

_("image.gif").endsWith("gif")
=> true

succ _.succ(str)

Returns the successor to str.

_('a').succ()
=> 'b'

_('A').succ()
=> 'B'

supplant

Supplant function was removed, use Underscore.js template function.

strip alias for trim

lstrip alias for ltrim

rstrip alias for rtrim

titleize _.titleize(string)

_('my name is epeli').titleize()
=> 'My Name Is Epeli'

camelize _.camelize(string)

Converts underscored or dasherized string to a camelized one

_('-moz-transform').camelize()
=> 'MozTransform'

underscored _.underscored(string)

Converts a camelized or dasherized string into an underscored one

_(MozTransform).underscored()
=> 'moz_transform'

dasherize _.dasherize(string)

Converts a underscored or camelized string into an dasherized one

_('MozTransform').dasherize()
=> '-moz-transform'

trim _.trim(string, [characters])

trims defined characters from begining and ending of the string. Defaults to whitespace characters.

_.trim("  foobar   ")
=> "foobar"

_.trim("_-foobar-_", "_-")
=> "foobar"

ltrim _.ltrim(string, [characters])

Left trim. Similar to trim, but only for left side.

rtrim _.rtrim(string, [characters])

Left trim. Similar to trim, but only for right side.

truncate _.truncate(string, length, truncateString)

_('Hello world').truncate(5)
=> 'Hello...'

words _.words(str, delimiter=" ")

Split string by delimiter (String or RegExp), ' ' by default.

_.words("I love you")
=> ["I","love","you"]

_.words("I_love_you", "_")
=> ["I","love","you"]

_.words("I-love-you", /-/)
=> ["I","love","you"]

sprintf _.sprintf(string format, *arguments)

C like string formatting. Credits goes to Alexandru Marasteanu. For more detailed documentation, see the original page.

_.sprintf("%.1f", 1.17)
"1.2"

Roadmap

• Resolve problem with function names crossing between libraries (include, contains and etc).

Any suggestions or bug reports are welcome. Just email me or more preferably open an issue.

Changelog

1.1.2

• Created functions: lines, chars, words functions

1.0.2

• Created integration test suite with underscore.js 1.1.4 (now it's absolutely compatible)
• Removed 'reverse' function, because this function override underscore.js 'reverse'

Contributors list

• Esa-Matti Suuronen esa-matti@suuronen.org (http://esa-matti.suuronen.org/),
• Edward Tsech edtsech@gmail.com,
• Sasha Koss kossnocorp@gmail.com (http://koss.nocorp.me/),
• Vladimir Dronnikov dronnikov@gmail.com

Licence

The MIT License

Copyright (c) 2011 Eduard Tsech edtsech@gmail.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.