Code coverage report for array/join.js

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define(['./filter'], function(filter) {
 
    function isValidString(val) {
        return (val != null && val !== '');
    }
 
    /**
     * Joins strings with the specified separator inserted between each value.
     * Null values and empty strings will be excluded.
     * @version 0.1.0 (2012/08/24)
     */
    function join(items, separator) {
        separator = separator || '';
        return filter(items, isValidString).join(separator);
    }
 
    return join;
});