disregard empty field in array
var colors=["red","blue",,null,undefined,,"green"];
//remove null and undefined elements from colors
var realColors = colors.filter(function (e) {return e != null;});
console.log(realColors);disregard empty field in array
var colors=["red","blue",,null,undefined,,"green"];
//remove null and undefined elements from colors
var realColors = colors.filter(function (e) {return e != null;});
console.log(realColors);check array empty or not in javascript
// To safely test if the array referenced by variable “array” isn’t empty:
if (array && array.length) {
// not empty
} else {
// empty
}
// Note that if “array” is assigned to some other object that isn’t an array, the code will still execute the “else” part.
// A possible improvement to check that the object is specifically an empty array might be this:
if (array && array.constructor === Array && array.length === 0) {
// strictly an empty array
} else {
// either null, or not an array or not an empty array
}Copyright © 2021 Codeinu
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