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Groups > comp.lang.javascript > #18000 > unrolled thread
| Started by | Thomas Li <cooooooder@gmail.com> |
|---|---|
| First post | 2013-01-07 02:02 -0800 |
| Last post | 2013-01-07 21:49 -0800 |
| Articles | 3 — 2 participants |
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Function definition expression has a length property? Thomas Li <cooooooder@gmail.com> - 2013-01-07 02:02 -0800
Re: Function definition expression has a length property? Stefan Weiss <krewecherl@gmail.com> - 2013-01-07 11:26 +0100
Re: Function definition expression has a length property? Thomas Li <cooooooder@gmail.com> - 2013-01-07 21:49 -0800
| From | Thomas Li <cooooooder@gmail.com> |
|---|---|
| Date | 2013-01-07 02:02 -0800 |
| Subject | Function definition expression has a length property? |
| Message-ID | <91b7a4ff-8eb7-4ef2-ac97-4e046024d5f0@googlegroups.com> |
Why function definition expression has a "length" property and its value is always 1?
like:
var square = function(x){return x*x;};
square.length
log value from IE9 javascript console:
>> var square = function(x){return x*x;};
>> square(12)
144
>> square.length
1
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| From | Stefan Weiss <krewecherl@gmail.com> |
|---|---|
| Date | 2013-01-07 11:26 +0100 |
| Message-ID | <kce7s4$h9o$2@news.albasani.net> |
| In reply to | #18000 |
On 2013-01-07 11:02, Thomas Li wrote: > Why function definition expression has a "length" property and its value is always 1? Not just function expressions, every function object has a length property. Its value is the number of parameters in the function definition. - stefan
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| From | Thomas Li <cooooooder@gmail.com> |
|---|---|
| Date | 2013-01-07 21:49 -0800 |
| Message-ID | <850330a4-b85e-41e3-b56c-fd0c53b3ee2a@googlegroups.com> |
| In reply to | #18002 |
On Monday, January 7, 2013 6:26:12 PM UTC+8, Stefan Weiss wrote: > On 2013-01-07 11:02, Thomas Li wrote: > > > Why function definition expression has a "length" property and its value is always 1? > > > > Not just function expressions, every function object has a length > > property. Its value is the number of parameters in the function definition. > > > > - stefan Thanks, stefan :)
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