TrainSignManage/WebFrame/bower_components/moment/src/lib/locale/locales.js

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import isArray from '../utils/is-array';
import hasOwnProp from '../utils/has-own-prop';
import isUndefined from '../utils/is-undefined';
import compareArrays from '../utils/compare-arrays';
import { deprecateSimple } from '../utils/deprecate';
import { mergeConfigs } from './set';
import { Locale } from './constructor';
import keys from '../utils/keys';

import { baseConfig } from './base-config';

// internal storage for locale config files
var locales = {};
var localeFamilies = {};
var globalLocale;

function normalizeLocale(key) {
    return key ? key.toLowerCase().replace('_', '-') : key;
}

// pick the locale from the array
// try ['en-au', 'en-gb'] as 'en-au', 'en-gb', 'en', as in move through the list trying each
// substring from most specific to least, but move to the next array item if it's a more specific variant than the current root
function chooseLocale(names) {
    var i = 0, j, next, locale, split;

    while (i < names.length) {
        split = normalizeLocale(names[i]).split('-');
        j = split.length;
        next = normalizeLocale(names[i + 1]);
        next = next ? next.split('-') : null;
        while (j > 0) {
            locale = loadLocale(split.slice(0, j).join('-'));
            if (locale) {
                return locale;
            }
            if (next && next.length >= j && compareArrays(split, next, true) >= j - 1) {
                //the next array item is better than a shallower substring of this one
                break;
            }
            j--;
        }
        i++;
    }
    return null;
}

function loadLocale(name) {
    var oldLocale = null;
    // TODO: Find a better way to register and load all the locales in Node
    if (!locales[name] && (typeof module !== 'undefined') &&
            module && module.exports) {
        try {
            oldLocale = globalLocale._abbr;
            var aliasedRequire = require;
            aliasedRequire('./locale/' + name);
            getSetGlobalLocale(oldLocale);
        } catch (e) {}
    }
    return locales[name];