If condition based to a null field

[utente]

Hi all,

I think that this question is very simple for an expert developer, but for me it generate a big confusion.

when i prepare an "if" [condition] inside a script based on an hypothetical field storen in a table of the system is better use:

1. if  ( filed == '' )    { ... }
2. if  ( field == null )    { ... } 
3. if  ( field === null )    { ... }

Best Regards

Vincenzo

[Deepak Ingale1]

Are you looking for valid field or field with valid value ( not null ? )

[arielgritti]

Hello

Maybe this can help you

You can use this if you are looking for a field's null value

I hope my answer has been useful

Ariel

PS: Please mark my answer correct or helpful if I have helped you. Thanks

[Deepak Ingale1 · Accepted solution]

So there are different ways to check if field value is null or undefined or false

1) If you want to look for undefined or null or nil or false, you can use JSUtil.nil(recordReference.fieldName)

2) If you are looking for null / nil check only, you can also use gs.nil() method

3) Already pointed in this thread 🙂

Hope above reply assist you now and in future !!!

[Inactive User14]

Hi, nil() is good, ok but i write this simple function JS code. Enjoy.

//

// " ! " always returns false!

//

var fEmpty = function (vEmpty) {

if (typeof vEmpty === 'string') { vEmpty = vEmpty.trim(); } //remove spaces

if (!vEmpty) { return false }

else { return true }}

// Test

xx = new Array();

xx[0] = "";

xx[1] = null;

xx[2] = undefined;

xx[3] = NaN;

xx[4] = 0;

xx[5] = " ";

//xx[6]=

vfalse=false;

xx[7] = " ss ";

xx[8] = 12;

xx[9] = "aaa";

arr = ['a', 'b'];

function Student(n, a) {

this.name = n;

this.age = a; }

obj = new Student("RntPsc");

vtrue=true;

// Evidence

console.log(fEmpty(xx[0])); // false ""

console.log(fEmpty(xx[1])); // false null

console.log(fEmpty(xx[2])); // false undefined

console.log(fEmpty(xx[3])); // false NaN

console.log(fEmpty(xx[4])); // false 0

console.log(fEmpty(xx[5])); // false " "

console.log(fEmpty(xx[6])); // false xx[6] not defined

console.log(fEmpty(obj.age)); // false obj.age not defined

console.log(fEmpty(vfalse)); // false false

console.log("end true"); // end false

console.log(fEmpty(xx[7])); // true " ss "

console.log(fEmpty(xx[8])); // true 12

console.log(fEmpty(xx[9])); // true "aaa"

console.log(fEmpty(arr)); // true ['a', 'b']

console.log(fEmpty(obj.name));// true obj.name = "RntPsc"

console.log(fEmpty(vtrue)); // true true

console.log("end false"); // end true