How to pass a double value into a JavaScript array

Question

How to pass double values into a JavaScript array:

var a = 15,2;
var tab = [a];

In fact, I'm trying to do not change a's value directly, but I need to deal it implicitly. (in my app the a's value is generated dynamically so I can't explicitly change its comma)

This table should have only one cell, but it's taking two cells.

Any brilliant idea, please?

JavaScript numeric constants use . as the fraction separator, not ,. — Pointy
– Pointy, Commented Mar 12, 2014 at 14:37
That's not a double. The decimal point should be a dot (.): 15.2. — Daniël Knippers
– Daniël Knippers, Commented Mar 12, 2014 at 14:37
BTW, I don't see how it take two cells : this is a syntax error. — Denys Séguret
– Denys Séguret, Commented Mar 12, 2014 at 14:38
It's taking two cells? What are you talking about? var a = 15,2; is a syntax error. — freakish
– freakish, Commented Mar 12, 2014 at 14:38

2 revs, 2 users 75% · Accepted Answer · 2014-03-12 14:42:41Z

3

Number literals use a dot (.) as the decimal point:

var a = 15.2;
//        ^------ dot (.), not comma (,)
var tab = [a];

edited Mar 12, 2014 at 14:42

community wiki

2 revs, 2 users 75%
dystroy

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8 Comments

ABCmo Over a year ago

In fact, I'm trying to do not change a's value directly, but I need to deal it implicitly.

Denys Séguret Over a year ago

What do you mean? This doesn't change a's value from anything : your code doesn't even compile.

ABCmo Over a year ago

in my app the a's value is generated dynamically so I can't explicitly change its comma.

Denys Séguret Over a year ago

Well, you can't have var a = 15,2; in your code, apart in a string.

epascarello Over a year ago

well than you have a problem @ABCmo.

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