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function array_udiff_uassoc (arr1) {
    // Returns the entries of arr1 that have values which are not present in any of the others arguments but do additional checks whether the keys are equal. Keys and elements are compared by user supplied functions.  
    // 
    // version: 1109.2015
    // discuss at: http://phpjs.org/functions/array_udiff_uassoc    // +   original by: Brett Zamir (http://brett-zamir.me)
    // *     example 1: $array1 = {a: 'green', b: 'brown', c: 'blue', 0: 'red'}
    // *     example 1: $array2 = {a: 'GREEN', B: 'brown', 0: 'yellow', 1: 'red'}
    // *     example 1: array_udiff_uassoc($array1, $array2, function (f_string1, f_string2){var string1 = (f_string1+'').toLowerCase(); var string2 = (f_string2+'').toLowerCase(); if (string1 > string2) return 1; if (string1 == string2) return 0; return -1;}, function (f_string1, f_string2){var string1 = (f_string1+'').toLowerCase(); var string2 = (f_string2+'').toLowerCase(); if (string1 > string2) return 1; if (string1 == string2) return 0; return -1;});
    // *     returns 1: {0: 'red', c: 'blue'}    var retArr = {},
        arglm1 = arguments.length - 1,
        arglm2 = arglm1 - 1,
        cb = arguments[arglm1],
        cb0 = arguments[arglm2],        k1 = '',
        i = 1,
        k = '',
        arr = {};
     cb = (typeof cb === 'string') ? this.window[cb] : (Object.prototype.toString.call(cb) === '[object Array]') ? this.window[cb[0]][cb[1]] : cb;
    cb0 = (typeof cb0 === 'string') ? this.window[cb0] : (Object.prototype.toString.call(cb0) === '[object Array]') ? this.window[cb0[0]][cb0[1]] : cb0;
 
    arr1keys: for (k1 in arr1) {
        for (i = 1; i < arglm2; i++) {            arr = arguments[i];
            for (k in arr) {
                if (cb0(arr[k], arr1[k1]) === 0 && cb(k, k1) === 0) {
                    // If it reaches here, it was found in at least one array, so try next value
                    continue arr1keys;                }
            }
            retArr[k1] = arr1[k1];
        }
    } 
    return retArr;
}

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$array1 = {a: 'green', b: 'brown', c: 'blue', 0: 'red'}
$array2 = {a: 'GREEN', B: 'brown', 0: 'yellow', 1: 'red'}
array_udiff_uassoc($array1, $array2, function (f_string1, f_string2){var string1 = (f_string1+'').toLowerCase(); var string2 = (f_string2+'').toLowerCase(); if (string1 > string2) return 1; if (string1 == string2) return 0; return -1;}, function (f_string1, f_string2){var string1 = (f_string1+'').toLowerCase(); var string2 = (f_string2+'').toLowerCase(); if (string1 > string2) return 1; if (string1 == string2) return 0; return -1;});

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{0: 'red', c: 'blue'}