Why is the length of an array 0 after a assign a key/value pair? (JS)

Question

var array = new Array()
array.name = 'peter'
console.log(array.length) //returns 0
console.log(array.name) //returns peter

I would've expected the length to be 1 and not 0. Can anyone explain what is going on here?

You are mixing object and array syntax. Expect the unexpected. — jmargolisvt, May 29 '20 at 15:54
for set the array value to an array you must use index as a property like this: `array[0] = 'peter'`. — Amir, May 29 '20 at 15:55

score 2 · Accepted Answer · answered May 29 '20 at 15:54

2

You need to push value to array.

array.push({name:'peter'});

answered May 29 '20 at 15:54

Nonik

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score 1 · Answer 2 · answered May 29 '20 at 15:54

1

That merely add a property name to instance of that array object. To actually add item to the array to increase its size, you need to push item into it. Something like, array.push('peter').

answered May 29 '20 at 15:54

noobius

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Why is the length of an array 0 after a assign a key/value pair? (JS)

2 Answers2