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  • Rank 119,975 (Top 3 %)
  • Language
    JavaScript
  • License
    Apache License 2.0
  • Created almost 12 years ago
  • Updated over 1 year ago

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Repository Details

JavaScript implementation of the ICU (International Components for Unicode) that uses the Common Locale Data Repository to format dates, plurals, and more. Based on twitter-cldr-rb.

twitter-cldr-js Build Status

TwitterCldr uses Unicode's Common Locale Data Repository (CLDR) to format certain types of text into their localized equivalents via the Rails asset pipeline. It is a port of twitter-cldr-rb, a Ruby gem that uses the same CLDR data. Originally, this project was not a gem, but a collection of JavaScript files. It has been turned into a gem to move the JavaScript compiling routines from twitter-cldr-rb and provide support for the asset pipeline.

Currently, twitter-cldr-js supports the following:

  1. Date and time formatting
  2. Relative date and time formatting (eg. 1 month ago)
  3. Number formatting (decimal, currency, and percentage)
  4. Long/short decimals
  5. Plural rules
  6. Bidirectional reordering
  7. Text Segmentation

Installation

Add twitter-cldr-js to your Gemfile:

gem 'twitter_cldr_js', :require => 'twitter_cldr/js'

If you're not using bundler, run gem install twitter_cldr_js and then require twitter_cldr/js somewhere in your project. Note that twitter-cldr-js isn't really designed to run outside of Rails. If you need the JavaScript functionality it provides but aren't using Rails, consider copying the compiled JavaScript files (lib/assets/javascripts/twitter_cldr/*.js) into your project by hand instead of using this gem directly.

You can also get twitter-cldr-js in a form of an NPM package:

npm install twitter_cldr

Check out twitter/twitter-cldr-npm repository for details.

Usage with Rails

To use twitter-cldr-js, you need to make use of two files: the core file with the libraries, core.js and one of the various locale data files, es.js, en.js etc. You can include them in your JavaScript manifest (app/assets/javascripts/application.js) like this:

//= require twitter_cldr/es
//= require twitter_cldr/core

This will make the core library twitter-cldr-js available to the JavaScript in your app along with the data bundle for the Spanish locale. If your app supports multiple languages however, this single-locale approach won't be much use. Instead, require the right file with javascript_include_tag for example in a view or a layout:

<%= javascript_include_tag "twitter_cldr/#{I18n.locale}.js" %>

Initialization

You need to load the core library along with a language bundle for optimal use. If you load the data bundle before the core library, the core library sets the data bundle as its data source.

//= require twitter_cldr/es
//= require twitter_cldr/core

You can verify that by trying this:

TwitterCldr.Settings.locale(); // "es"

If you only load the core library, without the data set, the same command will result in an error.

// (only loaded `twitter_cldr/core`)
TwitterCldr.Settings.locale(); // Error: "Data not set"

You can change the data bundle the library is using as its source by invoking the set_data method on the TwitterCldr object.

es_data = ...; // The es locale data bundle
ar_data = ...; // The ar locale data bundle

TwitterCldr.set_data(es_data);
TwitterCldr.Settings.locale(); // "es"

TwitterCldr.set_data(ar_data);
TwitterCldr.Settings.locale(); // "ar"

Dates and Times

// include the es data bundle for the Spanish DateTimeFormatter
var fmt = new TwitterCldr.DateTimeFormatter();

fmt.format(new Date(), {"type": "full"});                     // "lunes, 12 de diciembre de 2011 21:44:57 UTC -0800"
fmt.format(new Date(), {"type": "long"});                     // "12 de diciembre de 201121:45:42 -08:00"
fmt.format(new Date(), {"type": "medium"});                   // "12/12/2011 21:46:09"
fmt.format(new Date(), {"type": "short"});                    // "12/12/11 21:47"

fmt.format(new Date(), {"format": "date", "type": "full"});   // "lunes, 12 de diciembre de 2011"
fmt.format(new Date(), {"format": "date", "type": "long"});   // "12 de diciembre de 2011"
fmt.format(new Date(), {"format": "date", "type": "medium"}); // "12/12/2011"
fmt.format(new Date(), {"format": "date", "type": "short"});  // "12/12/11"

fmt.format(new Date(), {"format": "time", "type": "full"});   // "21:44:57 UTC -0800"
fmt.format(new Date(), {"format": "time", "type": "long"});   // "21:45:42 -08:00"
fmt.format(new Date(), {"format": "time", "type": "medium"}); // "21:46:09"
fmt.format(new Date(), {"format": "time", "type": "short"});  // "21:47"

The default CLDR data set only includes 4 date formats, full, long, medium, and short. See below for a list of additional formats.

Additional Date Formats

Besides the default date formats, CLDR supports a number of additional ones. The list of available formats varys for each locale. To get a full list, use the additional_formats method:

// ["EEEEd", "Ed", "GGGGyMd", "H", "Hm", "Hms", "M", "MEd", "MMM", "MMMEEEEd", "MMMEd", ... ]
TwitterCldr.DateTimeFormatter.additional_formats();

You can use any of the returned formats as the format option when formatting dates:

// 30/11/2012 15:38:33
fmt.format(new Date(), {});
// 30 de noviembre
fmt.format(new Date(), {"format": "additional", "type": "EEEEd"});

It's important to know that, even though a format may not be available across locales, TwitterCLDR will do it's best to approximate if no exact match can be found.

List of additional date format examples for English:
Format Output
EHm Wed 17:05
EHms Wed 17:05:33
Ed 28 Wed
Ehm Wed 5:05 p.m.
Ehms Wed 5:05:33 p.m.
Gy 2012 AD
H 17
Hm 17:05
Hms 17:05:33
M 11
MEd Wed 11/28
MMM Nov
MMMEd Wed Nov 28
MMMd Nov 28
Md 11/28
d 28
h 5 p.m.
hm 5:05 p.m.
hms 5:05:33 p.m.
ms 05:33
y 2012
yM 11/2012
yMEd Wed 11/28/2012
yMMM Nov 2012
yMMMEd Wed Nov 28 2012
yMMMd Nov 28 2012
yMd 11/28/2012
yQQQ Q4 2012
yQQQQ 4th quarter 2012

Relative Dates and Times

In addition to formatting full dates and times, TwitterCLDR supports relative time spans. It tries to guess the best time unit (eg. days, hours, minutes, etc) based on the length of time given. Indicate past or future by using negative or positive numbers respectively:

// include the en data bundle for the English TimespanFormatter
var fmt = new TwitterCldr.TimespanFormatter();
var then = Math.round(new Date(2012, 1, 1, 12, 0, 0).getTime() / 1000);
var now = Math.round(Date.now() / 1000);

fmt.format(then - now);                    // "6 months ago"
fmt.format(then - now, {unit: "week"});    // "24 weeks ago"
fmt.format(then - now, {unit: "year"});    // "0 years ago"
fmt.format(then + now, {unit: "week"});    // "In 24 weeks"
fmt.format(then + now, {unit: "year"});    // "In 0 years"

The TimespanFormatter can also handle time spans without a direction via the direction: "none" option. Directionless timespans can be combined with the type option:

fmt.format(180, {direction: "none", type: "short"});                 // "3 mins"
fmt.format(180, {direction: "none", type: "abbreviated"});           // "3m"
fmt.format(180, {direction: "none", type: "short", unit: "second"}); // "180 secs"

By default, timespans are exact representations of a given unit of elapsed time. TwitterCLDR also supports approximate timespans which round up to the nearest larger unit. For example, "44 seconds" remains "44 seconds" while "45 seconds" becomes "1 minute". To approximate, pass the approximate: true option:

fmt.format(44, {approximate: true});  // Dentro de 44 segundos
fmt.format(45, {approximate: true});  // Dentro de 1 minuto
fmt.format(52, {approximate: true});  // Dentro de 1 minuto

Numbers

twitter-cldr-js number formatting supports decimals, currencies, and percentages.

Decimals

// include the es data bundle for the Spanish NumberFormatter
var fmt = new TwitterCldr.DecimalFormatter();
fmt.format(1337);                      // "1.337"
fmt.format(-1337);                     // "-1.337"
fmt.format(1337, {precision: 2});      // "1.337,00"

Short / Long Decimals

In addition to formatting regular decimals, TwitterCLDR supports short and long decimals. Short decimals abbreviate the notation for the appropriate power of ten, for example "1M" for 1,000,000 or "2K" for 2,000. Long decimals include the full notation, for example "1 million" or "2 thousand":

var fmt = new TwitterCldr.ShortDecimalFormatter();
fmt.format(2337);     // 2K
fmt.format(1337123);  // 1M

fmt = new TwitterCldr.LongDecimalFormatter();
fmt.format(2337);     // 2 thousand
fmt.format(1337123);  // 1 million

Currencies

var fmt = new TwitterCldr.CurrencyFormatter();
fmt.format(1337, {currency: "EUR"});                 // 1.337,00 €

Percentages

var fmt = new TwitterCldr.PercentFormatter();
fmt.format(1337);                      // 1.337%
fmt.format(1337, {precision: 2});      // 1.337,00%

More on Currencies

If you're looking for a list of supported currencies, use the Currencies function:

# all supported currency codes
TwitterCldr.Currencies.currency_codes()             # ["ADP", "AED", "AFA", "AFN", ... ]

# data for a specific currency code
TwitterCldr.Currencies.for_code("CAD")            # {currency: "CAD", name: "Canadian dollar", cldr_symbol: "CA$", symbol: "$", code_points: [36]}

Plural Rules

Some languages, like English, have "countable" nouns. You probably know this concept better as "plural" and "singular", i.e. the difference between "strawberry" and "strawberries". Other languages, like Russian, have three plural forms: one (numbers ending in 1), few (numbers ending in 2, 3, or 4), and many (everything else). Still other languages like Japanese don't use countable nouns at all.

TwitterCLDR makes it easy to find the plural rules for any numeric value:

// include the ru data bundle for access to Russian Plural rules
TwitterCldr.PluralRules.rule_for(1);      // "one"
TwitterCldr.PluralRules.rule_for(2);      // "few"
TwitterCldr.PluralRules.rule_for(8);      // "many"

Get all the rules for your language:

TwitterCldr.PluralRules.all();            // ["one", "few", "many", "other"]

Rule Based Number Formatting

The available rule-based number formats defined by the CLDR data set vary by language. Some languages support ordinal and cardinal numbers, occasionally with an additional masculine/feminine option, while others do not. You'll need to consult the list of available formats for your language.

Rule-based number formats are categorized by groups, and within groups by rulesets. You'll need to specify both to make use of all the available formats for your language.

To get a list of supported groups for the current locale, use the group_names method:

// include the en data bundle for the English RBNF Formatter
var formatter = new TwitterCldr.RBNF()
formatter.group_names()

To get a list of supported rulesets for a group name, use the rule_set_names_for_group method:

formatter.rule_set_names_for_group('SpelloutRules')
// [ '2d-year', 'spellout-numbering-year', 'spellout-numbering', ..., 'spellout-ordinal-verbose' ]

formatter.rule_set_names_for_group('OrdinalRules')
// [ 'digits-ordinal' ]

Once you've chosen a group and ruleset, you can pass them to the format method:

formatter.format(123, 'OrdinalRules', 'digits-ordinal')
// '123rd'

In comparison, here is what the Spanish formatting looks like

// include the es data bundle for the Spanish RBNF Formatter
var formatter = new TwitterCldr.RBNF()
format.format(123, 'OrdinalRules', 'digits-ordinal-masculine') // '123º'
format.format(123, 'OrdinalRules', 'digits-ordinal-feminine')  // '123ª'

For languages that have support for SpelloutRules, like English (and other languages), you can also specify an ordinal spellout:

formatter.format(1024, "SpelloutRules", "spellout-ordinal")
// 'one thousand twenty-fourth'

Handling Bidirectional Text

When it comes to displaying text written in both right-to-left (RTL) and left-to-right (LTR) languages, most display systems run into problems. The trouble is that Arabic or Hebrew text and English text (for example) often get scrambled visually and are therefore difficult to read. It's not usually the basic ASCII characters like A-Z that get scrambled - it's most often punctuation marks and the like that are confusingly mixed up (they are considered "weak" types by Unicode).

To mitigate this problem, Unicode supports special invisible characters that force visual reordering so that mixed RTL and LTR (called "bidirectional") text renders naturally on the screen. The Unicode Consortium has developed an algorithm (The Unicode Bidirectional Algorithm, or UBA) that intelligently inserts these control characters where appropriate. You can make use of the UBA implementation in TwitterCLDR by creating a new instance of TwitterCldr.Bidi via the from_string method, and manipulating it like so:

var bidi_str = TwitterCldr.Bidi.from_string("hello نزوة world", {"direction": "RTL"});
bidi_str.reorder_visually();
bidi_str.toString();

Disclaimer: Google Translate tells me the Arabic in the example above means "fancy", but my confidence is not very high, especially since all the letters are unattached. Apologies to any native speakers :)

Postal Codes

The CLDR contains postal code validation regexes for a number of countries.

// United States
TwitterCldr.PostalCodes.is_valid("us", "94103");     // true
TwitterCldr.PostalCodes.is_valid("us", "9410");      // false

// England (Great Britain)
TwitterCldr.PostalCodes.is_valid("gb", "BS98 1TL");  // true

// Sweden
TwitterCldr.PostalCodes.is_valid("se", "280 12");    // true

// Canada
TwitterCldr.PostalCodes.is_valid("ca", "V3H 1Z7");   // true

Get a list of supported territories by using the territories method:

TwitterCldr.PostalCodes.territories();  // ["ad", "am", "ar", "as", "at", ... ]

Just want the regex? No problem:

TwitterCldr.PostalCodes.regex_for_territory("us");  // /\d{5}([ \-]\d{4})?/

Phone Codes

Look up phone codes by territory:

// United States
TwitterCldr.PhoneCodes.code_for_territory("us");  // "1"

// Perú
TwitterCldr.PhoneCodes.code_for_territory("pe");  // "51"

// Egypt
TwitterCldr.PhoneCodes.code_for_territory("eg");  // "20"

// Denmark
TwitterCldr.PhoneCodes.code_for_territory("dk"); // "45"

Get a list of supported territories by using the territories method:

TwitterCldr.PhoneCodes.territories();  // ["zw", "an", "tr", "by", "mh", ...]

Territories Containment

Determine if a territory/region contains another region or a country (as describe here):

TwitterCldr.TerritoriesContainment.children('151') // ["BG", "BY", "CZ", "HU", "MD", "PL", ...]
TwitterCldr.TerritoriesContainment.children('RU')  // []

TwitterCldr.TerritoriesContainment.parents('013') // ["419", "003", "019"]
TwitterCldr.TerritoriesContainment.parents('001') // []

TwitterCldr.TerritoriesContainment.contains('151', 'RU') // true
TwitterCldr.TerritoriesContainment.contains('419', 'BZ') // true
TwitterCldr.TerritoriesContainment.contains('419', 'FR') // false

Unicode Regular Expressions

Unicode regular expressions are an implementaion of regular expressions that support all Unicode characters in the BMP. They provide support for multi-character strings, Unicode character escapes, set operations (unions, intersections, and differences), and character sets.

Changes to Character Classes

Here's a complete list of the operations you can do inside a Unicode regex's character class.

Regex Description
[a] The set containing 'a'.
[a-z] The set containing 'a' through 'z' and all letters in between, in Unicode order.
[^a-z] The set containing all characters except 'a' through 'z', that is, U+0000 through 'a'-1 and 'z'+1 through U+10FFFF.
[[pat1][pat2]] The union of sets specified by pat1 and pat2.
[[pat1]&[pat2]] The intersection of sets specified by pat1 and pat2.
[[pat1]-[pat2]] The symmetric difference of sets specified by pat1 and pat2.
[:Lu:] or \p{Lu} The set of characters having the specified Unicode property; in this case, Unicode uppercase letters.
[:^Lu:] or \P{Lu} The set of characters not having the given Unicode property.

For a description of available Unicode properties, see Wikipedia (click on "[show]").

Using Unicode Regexes

Create Unicode regular expressions via the compile method:

regex = TwitterCldr.UnicodeRegex.compile("[:Lu:]+");
regex2 = TwitterCldr.UnicodeRegex.compile("\\p{Lu}+", "g");
							//escaping the '\'
regex3 = TwitterCldr.UnicodeRegex.compile("[[a-z]-[d-g]]+", "g");
							//supports the JavaScript RegExp modifiers

Once compiled, instances of UnicodeRegex can be directly used to match against a string:

regex.match("ABC");  // ["ABC"]
regex2.match("ABCDfooABC");  // ["ABCD", "ABC"]
regex3.match("dog"); // ["o"]

Alternatively, you can convert a UnicodeRegex into a native JavaScript regex by calling its to_regexp method:

regex3.to_regexp(); // /(?:[\u0061-\u0063]|[\u0068-\u007a])+/g
regex3.to_regexp().test("a"); // true
regex3.to_regexp().test("d"); // false

Protip: Try to avoid negation in character classes (eg. [^abc] and \P{Lu}) as it tends to negatively affect both performance when constructing regexes as well as matching.

Text Segmentation

TwitterCLDR currently supports text segmentation by sentence as described in the Unicode Technical Report #29. The segmentation algorithm makes use of Unicode regular expressions (described above). Segmentation by word, line, and grapheme boundaries could also be supported if someone wants them.

Text segmentation is performed by the BreakIterator class (name borrowed from ICU). You can use the each_sentence method segment by sentence.

iterator = new TwitterCldr.BreakIterator("en");
iterator.each_sentence("The. Quick. Brown. Fox.");
						// "The.", " Quick.", " Brown.", " Fox."

To improve segmentation accuracy, a list of special segmentation exceptions have been created by the ULI (Unicode Interoperability Technical Committee). They help with special cases like the abbreviations "Mr." and "Ms." where breaks should not occur. ULI rules are enabled by default, but you can disable them via the use_uli_exceptions option:

iterator = new TwitterCldr.BreakIterator ("en",
						{"use_uli_exceptions" : false}
					);
iterator.each_sentence("I like Ms. Murphy, she's nice.");
						// ["I like Ms.", " Murphy, she's nice."]

Generating the JavaScript

The JavaScript files that make up twitter-cldr-js can be automatically generated for each language via a set of Rake tasks.

  • Build js files in the current directory: bundle exec rake twitter_cldr:js:compile

  • Build js files into a given directory: bundle exec rake twitter_cldr:js:compile OUTPUT_DIR=/path/to/output/dir

  • Build only the specified locales: bundle exec rake twitter_cldr:js:compile OUTPUT_DIR=/path/to/output/dir LOCALES=ar,he,ko,ja

  • Rebuild the js files internally in the gem: bundle exec rake twitter_cldr:js:update

Requirements

twitter-cldr-js requires Rails 3.1 or later. To run the JavaScript test suite, you'll need Node and the jasmine-node NPM package.

Running Tests

  1. Install node (eg. brew install node, sudo apt-get install node, etc)
  2. Install jasmine-node: npm install jasmine-node -g
  3. Run bundle install
  4. Run bundle exec rake

Authors

Links

License

Copyright 2015 Twitter, Inc.

Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0

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Python
77
star
73

twitter.github.io

HTML
74
star
74

diffusion-rl

Python
68
star
75

go-bindata

Go
68
star
76

birdwatch

67
star
77

cloudhopper-commons

Cloudhopper Commons
Java
57
star
78

.github

Twitter GitHub Organization-wide files
49
star
79

twitter-cldr-npm

TwitterCldr npm package
JavaScript
49
star
80

bazel-multiversion

Bazel rules to resolve, fetch and manage 3rdparty JVM dependencies with support for multiple parallel versions of the same dependency. Powered by Coursier.
Scala
47
star
81

libwatchman

A C interface to watchman
C
45
star
82

sslconfig

Twitter's OpenSSL Configuration
43
star
83

ios-twitter-apache-thrift

A thrift encoding and decoding library for Swift
Swift
42
star
84

gatekeeper-service

GateKeeper is a service built to automate the manual steps involved in onboarding, offboarding, and lost asset scenarios.
Python
36
star
85

dodo

The Twitter OSS Project Builder
Shell
35
star
86

repo-scaffolding

Tools for creating repos based on open source standards and best practices
34
star
87

iago2

A load generator, built for engineers
Scala
25
star
88

caladrius

Performance modelling system for Distributed Stream Processing Systems (DSPS) such as Apache Heron and Apache Storm
Python
22
star
89

ossdecks

Repository for Twitter Open Source Decks
10
star
90

curation-style-guide

Document Repository for Twitter's Curation Style Guide
10
star
91

analytics-infra-governance

Description of the process for how to commit, review, and release code to the Scalding OSS family (Scalding, Summingbird, Algebird, Bijection, Storehaus, etc)
9
star
92

gpl-commitment

Twitter's GPL Cooperation Commitment
5
star
93

second-control-probability-distributions

4
star
94

google-tag-manager-event-tag

Smarty
3
star
95

google-tag-manager-base-tag

Smarty
2
star