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/*
YUI 3.17.2 (build 9c3c78e)
Copyright 2014 Yahoo! Inc. All rights reserved.
Licensed under the BSD License.
http://yuilibrary.com/license/
*/
YUI.add('arraysort', function (Y, NAME) {
/*jshint expr:true, onevar:false */
/**
Provides comparator functions useful for sorting arrays.
@module arraysort
**/
var LANG = Y.Lang,
ISVALUE = LANG.isValue,
ISSTRING = LANG.isString;
/**
Provides comparator functions useful for sorting arrays.
@class ArraySort
@static
**/
var ArraySort = Y.ArraySort = {
// -- Public Methods -------------------------------------------------------
/**
Comparator function for simple case-insensitive sorting of an array of
strings.
@method compare
@param a {Object} First sort argument.
@param b {Object} Second sort argument.
@param desc {Boolean} `true` if sort direction is descending, `false` if
sort direction is ascending.
@return {Boolean} -1 when a < b. 0 when a == b. 1 when a > b.
@static
*/
compare: function(a, b, desc) {
if(!ISVALUE(a)) {
if(!ISVALUE(b)) {
return 0;
}
else {
return 1;
}
}
else if(!ISVALUE(b)) {
return -1;
}
if(ISSTRING(a)) {
a = a.toLowerCase();
}
if(ISSTRING(b)) {
b = b.toLowerCase();
}
if(a < b) {
return (desc) ? 1 : -1;
}
else if (a > b) {
return (desc) ? -1 : 1;
}
else {
return 0;
}
},
/**
Performs a natural-order comparison of two strings or numbers (or a string
and a number). This ensures that a value like 'foo2' will be sorted before
'foo10', whereas a standard ASCII sort would sort 'foo10' first.
@example
var items = ['item10', 'item2', 'item1', 10, '1', 2];
items.sort(Y.ArraySort.naturalCompare);
console.log(items); // => ['1', 2, 10, 'item1', 'item2', 'item10']
@method naturalCompare
@param {Number|String} a First value to compare.
@param {Number|String} b Second value to compare.
@param {Object} [options] Options.
@param {Boolean} [options.caseSensitive=false] If `true`, a
case-sensitive comparison will be performed. By default the
comparison is case-insensitive.
@param {Boolean} [options.descending=false] If `true`, the sort order
will be reversed so that larger values are sorted before smaller
values.
@return {Number} `0` if the two items are equal, a negative number if _a_
should be sorted before _b_, or a positive number if _b_ should be
sorted before _a_.
@static
@since 3.11.0
**/
naturalCompare: function (a, b, options) {
// Coerce `a` and `b` to strings.
a += '';
b += '';
// Convert `a` and `b` to lowercase unless `options.caseSensitive` is
// truthy.
if (!options || !options.caseSensitive) {
a = a.toLowerCase();
b = b.toLowerCase();
}
// Split `a` and `b` into alpha parts and numeric parts.
var aParts = ArraySort._splitAlphaNum(a),
bParts = ArraySort._splitAlphaNum(b),
length = Math.min(aParts.length, bParts.length),
result = 0,
aPart,
bPart,
i;
// Compare each part of `a` with each part of `b`.
for (i = 0; i < length; i++) {
aPart = aParts[i];
bPart = bParts[i];
// If the two parts aren't equal, compare them and stop iterating.
if (aPart !== bPart) {
// First, try comparing them as numbers.
result = aPart - bPart;
// If that didn't work, compare them as strings. This falsiness
// check works because `result` can't be 0 (we checked for
// equality above) and NaN is falsy.
if (!result) {
result = aPart > bPart ? 1 : -1;
}
// At this point we know enough to be able to sort the two
// strings, so we don't need to compare any more parts.
break;
}
}
// If we get here and `result` is still 0, then sort the shorter string
// before the longer string.
result || (result = a.length - b.length);
// Return the result, flipping the order if `options.descending` is
// truthy.
return options && options.descending ? -result : result;
},
// -- Protected Methods ----------------------------------------------------
/**
Splits a string into an array of alpha character and digit character parts.
@example
Y.ArraySort._splitAlphaNum('abc123def456');
// => ['abc', '123', 'def', '456']
@method _splitAlphaNum
@param {String} string String to split.
@return {String[]} Array of alpha parts and digit parts.
@protected
@static
@since 3.11.0
**/
_splitAlphaNum: function (string) {
/*jshint boss:true */
var parts = [],
regex = /(\d+|\D+)/g,
match;
while (match = regex.exec(string)) { // assignment
parts.push(match[1]);
}
return parts;
}
};
}, '3.17.2', {"requires": ["yui-base"]});