function computeWeekdaysParse()

in charts/shared/moment.js [1807:1857]
45 lines of code
4 McCabe index (conditional complexity)

function computeWeekdaysParse() {
    function cmpLenRev(a, b) {
        return b.length - a.length;
    }

    var minPieces = [],
        shortPieces = [],
        longPieces = [],
        mixedPieces = [],
        i,
        mom,
        minp,
        shortp,
        longp;
    for (i = 0; i < 7; i++) {
        // make the regex if we don't have it already
        mom = createUTC([2000, 1]).day(i);
        minp = regexEscape(this.weekdaysMin(mom, ''));
        shortp = regexEscape(this.weekdaysShort(mom, ''));
        longp = regexEscape(this.weekdays(mom, ''));
        minPieces.push(minp);
        shortPieces.push(shortp);
        longPieces.push(longp);
        mixedPieces.push(minp);
        mixedPieces.push(shortp);
        mixedPieces.push(longp);
    }
    // Sorting makes sure if one weekday (or abbr) is a prefix of another it
    // will match the longer piece.
    minPieces.sort(cmpLenRev);
    shortPieces.sort(cmpLenRev);
    longPieces.sort(cmpLenRev);
    mixedPieces.sort(cmpLenRev);

    this._weekdaysRegex = new RegExp('^(' + mixedPieces.join('|') + ')', 'i');
    this._weekdaysShortRegex = this._weekdaysRegex;
    this._weekdaysMinRegex = this._weekdaysRegex;

    this._weekdaysStrictRegex = new RegExp(
        '^(' + longPieces.join('|') + ')',
        'i'
    );
    this._weekdaysShortStrictRegex = new RegExp(
        '^(' + shortPieces.join('|') + ')',
        'i'
    );
    this._weekdaysMinStrictRegex = new RegExp(
        '^(' + minPieces.join('|') + ')',
        'i'
    );
}