regex_for_smart_searching.js

.factory('smartRegExp', [function(){
			
			return { 
				get : function(searchTerm){
					
					searchTerm = searchTerm || '';
					
					var quoteMatch = searchTerm.match(/^"(.*)"$/);
					
					var regExp;
					
					if (quoteMatch) {
						//This supports DataTable "full string matching" in its smart search
						//Only match what is between the leading and trailing ", match in its entirety:
						regExp = new RegExp(quoteMatch[1]
							.toLowerCase(), 'gi');
						
					} else {
						
						// Replacing the data table https://datatables.net/reference/option/search.smart
						// https://stackoverflow.com/a/23452217/1175496
						// Build Regexp with logicial OR; any series of whitespaces
						//Adding
						regExp = new RegExp(searchTerm
							.toLowerCase()
							.replace(/\s+/g, "|")
							//Replace double quotes ; assume they haven't yet finished a quoteMatch with a trailing double-quote;
							//Doubtful sheet names ever contain a double-quote character; they're not looking for it:
							.replace(/\"/g, ''), 'gi');
					}
					
					
					return regExp;
				}
				
			}
		}])