javascript - Filter [empty] array object - Stack Overflow

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I'm deleting some array object in traditional way: delete subDirectories[index]. So, just after that this object is changing to [empty] one. Now, how to filter that, undefined, bool, NaN nothing works. I'm working with Vue.js and this contains an vuex action. Can anybody help?

I'm deleting some array object in traditional way: delete subDirectories[index]. So, just after that this object is changing to [empty] one. Now, how to filter that, undefined, bool, NaN nothing works. I'm working with Vue.js and this contains an vuex action. Can anybody help?

• javascript
• arrays
• json

Share Improve this question Follow asked Feb 6, 2018 at 0:45 LukasLukas 7,7442020 gold badges7979 silver badges127127 bronze badges 5

• check this stackoverflow./questions/281264/… – Gaurang Dave Commented Feb 6, 2018 at 0:47
• I don't understand what you are saying. Are you sure this is javascript? – keithlee96 Commented Feb 6, 2018 at 0:48
• @keithlee96 I've added the console log screen. – Lukas Commented Feb 6, 2018 at 0:49
• @GaurangDave tried this, and just like above, none of them doesn't work :( – Lukas Commented Feb 6, 2018 at 0:49
• @Lukas Can you share the JS code (operation you are performing)? – Gaurang Dave Commented Feb 6, 2018 at 1:10

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1 Answer 1

Sorted by: Reset to default 6

If you want to delete all null, undefined, (or any false-like) values in an array, you can just do:

var arr = [1,3,5, null, False];
var res = arr.filter(val=>val);
console.log(res); // [1,3,5]

Alternatively, you can explicitly remove null and undefined:

var res = arr.filter(val => (val!==undefined) && (val!==null));
console.log(res); // [1,3,5]

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