lib/freeze.js
function subArrayJoin(a, separator, from, to) {
    return a.slice(from, to + 1).join(separator);
}
function subArrayJoin(a, separator, from, to) {
    return a.slice(from, to + 1).join(separator);
}
function subArrayJoin ( a , separator , from , to ) { return a . slice ( from , to + 1 ) . join ( separator ) ; }
Join part of array.

@param {Array} a Array to join.
@param {String} separator Separator to use in join.
@param {Number} from Join start index.
@param {Number} to Join finish index.
@returns {String} Joined array string.
Join part of array .