I have a variable that can be either empty, number or text. I like to find only empty one. But the following codes using .length returned null for 0 number, though it returned 1 for "0" string . .toString.length even didn't work. Any suggestion? Thank you!
function test() {
// criteria can be either empty, number or text. How can I check whether the critieria is empty?
// In the example below, critiera_2.length returned null, not 1.
criteria_1 = "";
Logger.log(criteria_1.length);
criteria_2 = 0;
Logger.log(criteria_2.length);
criteria_3 = "0";
Logger.log(criteria_3.length);
criteria_4 = "X";
Logger.log(criteria_4.length);
criteria_1 = "";
Logger.log(criteria_1.toString.length);
criteria_2 = 0;
Logger.log(criteria_2.toString.length);
criteria_3 = "0";
Logger.log(criteria_3.toString.length);
criteria_4 = "X";
Logger.log(criteria_4.toString.length);
}
criteria_1 = "";
console.log(criteria_1.toString() == ''); // output: trueconst test = x => console.log(x.toString()==='');
test(""); // true
test(0); // false
test("0"); // false
test("X"); // falseIt's turned out that you don't even need toString() it could be just x===''
To check for an empty string, a simple approach would be to use === operator
if (criteria_1 === "") {
//...
}