When I push new value into array, variable return an integer [duplicate]

Question

I try to push a new value into my array. But when I execute my code an integer is show instead my new array.

var foo = ["Hello"].push(" word");
console.log(foo)

The .push() function returns the updated length of the array, and that's of course a number. — Pointy
– Pointy, Commented Feb 14, 2019 at 15:30
developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… — Roland Starke
– Roland Starke, Commented Feb 14, 2019 at 15:30

Damien · Accepted Answer · 2019-02-14 15:33:15Z

2

You should use concat in this context to achieve your goal.

var foo = ["Hello"].concat(" word");
console.log(foo)

answered Feb 14, 2019 at 15:33

Damien

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Comments

Shidersz · Accepted Answer · 2019-02-14 15:32:38Z

2

That is because you are storing the value that push returns on the variable foo:

The push() method adds one or more elements to the end of an array and returns the new length of the array.

You can do it this way:

var arr = ["hello"];
arr.push(" word");
console.log(arr);

answered Feb 14, 2019 at 15:32

Shidersz

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