29 lines
559 B
JavaScript
29 lines
559 B
JavaScript
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/**
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* Join `arr` with the trailing `str` defaulting to "and",
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* and `sep` string defaulting to ", ".
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*
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* @param {Array} arr
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* @param {String} str
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* @param {String} sep
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* @return {String}
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* @api public
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*/
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module.exports = function(arr, str, sep){
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str = str || 'and';
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sep = sep || ', ';
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if (arr.length < 2) return arr[0] || '';
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var oxford = str.slice(0, 2) === sep;
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if (!oxford) {
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str = ' ' + str;
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} else if (arr.length == 2) {
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str = str.slice(1);
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}
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return arr.slice(0, -1).join(sep) + str + ' ' + arr[arr.length - 1];
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};
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