"remove undefined from array" Code Answer's

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remove undefined from array javascript

By Enchanting ElandEnchanting Eland on Sep 27, 2020
var data = [42, 21, undefined, 50, 40, undefined, 9];

data = data.filter(function( element ) {
   return element !== undefined;
});

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1

remove null from array javascript

By Bored BatBored Bat on Jun 19, 2020
let array = [0, 1, null, 2, 3];

function removeNull(array) {
return array.filter(x => x !== null)
};

Source: edabit.com

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4

js remove undefined from array

By GitPauloGitPaulo on Jun 01, 2021
const a = [3,,null, false, undefined, 1];

// Remove falsey
a.filter(Boolean);
 
// Remove specific (undefined)
a.filter(e => e !== undefined);

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2

Javascript remove empty elements from array

By GrepperGrepper on Jul 25, 2019
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);

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6

remove empty values from array javascript

By Proud PorcupineProud Porcupine on Dec 22, 2019
var array = [0, 1, null, 2, "", 3, undefined, 3,,,,,, 4,, 4,, 5,, 6,,,,];

var filtered = array.filter(function (el) {
  return el != null;
});

console.log(filtered);

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4

remove undefined from array

By Vivacious VendaceVivacious Vendace on Jan 29, 2021
//? to use Array.prototype.filter here might be obvious. 
//So to remove only undefined values we could call

var data = [42, 21, undefined, 50, 40, undefined, 9];

data = data.filter(function( element ) {
   return element !== undefined;
});

//If we want to filter out all the falsy values (such as 0 or null),
//we can use return !!element; instead. But we can do it slighty more elegant,
//by just passing the Boolean constructor function,
//respectively the Number constructor function to .filter:

data = data.filter( Number );

//That would do the job in this instance,
//to generally remove any falsy value,
//we would call
data = data.filter( Boolean );
//Since the Boolean() constructor returns true on truthy values
//and false on any falsy value, this is a very neat option.

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2

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