Question

17

Array Length returns 0

rated 0 times [ 19] [ 2] / answers: 1 / hits: 68727 / 11 Years ago, sat, january 25, 2014, 12:00:00

Could anyone help explain why length is returning 0? Thank you VERY much in advance!

var errors = [];

errors[''] = Monday Morning slot already taken. Would you like to replace it?;

console.log(errors);

document.write(errors.length);

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lara

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answered 11 Years ago iselauniquef · Accepted Answer

Because that is not how you add an item since Arrays only accept numeric keys. You do it like this:

errors.push(blah);  /*or*/  errors[0] = blah;



//Now if you check the length:

errors.length;  //1

Also, if you are using it as an Object, '' ~~isn't a valid name~~ either.

*Correction: Looks like you can use (empty string) as a key.