analytics.js
function lowercase(arr) {
  var ret = new Array(arr.length);

  for (var i = 0; i < arr.length; ++i) {
    ret[i] = String(arr[i]).toLowerCase();
  }

  return ret;
}
function lowercase(arr) {
  var ret = new Array(arr.length);

  for (var i = 0; i < arr.length; ++i) {
    ret[i] = String(arr[i]).toLowerCase();
  }

  return ret;
}
function lowercase ( arr ) { var ret = new Array ( arr . length ) ; for ( var i = 0 ; i < arr . length ; ++ i ) { ret [ i ] = String ( arr [ i ] ) . toLowerCase ( ) ; } return ret ; }
Lowercase the given `arr`.

@api private
@param {Array} arr
@return {Array}
Lowercase the given arr .