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Groups > comp.lang.javascript > #22840
| Newsgroups | comp.lang.javascript |
|---|---|
| Date | 2014-01-28 05:57 -0800 |
| Message-ID | <b3e79681-ee2f-45bb-bcac-39505315bfde@googlegroups.com> (permalink) |
| Subject | I thought I understood JavaScript till they asked me this on a job interview |
| From | Alon Melanker <melankeril@gmail.com> |
function damn() {
this.x = 4;
var y = 3;
setTimeout(function() {alert(this.x); alert(y)}, 100);
this.aa = function() {
alert(this.x);
};
}
aaa = new damn();
aaa.aa();
What would be the output?!
The correct answer should be 4 undefined and 3.
I answered 4 4 3.
The question is why this.x inside setTimeout does not alert 4?
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I thought I understood JavaScript till they asked me this on a job interview Alon Melanker <melankeril@gmail.com> - 2014-01-28 05:57 -0800
Re: I thought I understood JavaScript till they asked me this on a job interview Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-01-28 15:58 +0100
Re: I thought I understood JavaScript till they asked me this on a job interview Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2014-01-28 16:38 +0100
Re: I thought I understood JavaScript till they asked me this on a job interview "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2014-01-28 17:25 +0100
Re: I thought I understood JavaScript till they asked me this on a job interview Christoph Michael Becker <cmbecker69@arcor.de> - 2014-01-28 19:00 +0100
Re: I thought I understood JavaScript till they asked me this on a job interview Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2014-01-29 10:22 +0100
Re: I thought I understood JavaScript till they asked me this on a job interview Christoph Michael Becker <cmbecker69@arcor.de> - 2014-01-29 17:34 +0100
Re: I thought I understood JavaScript till they asked me this on a job interview Jim T. <x@y.z> - 2014-01-29 12:45 -0500
Re: I thought I understood JavaScript till they asked me this on a job interview Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2014-01-30 09:09 +0100
Re: I thought I understood JavaScript till they asked me this on a job interview Alon Melanker <melankeril@gmail.com> - 2014-01-29 01:52 -0800
setTimeout() (was: I thought I understood JavaScript till they asked me this on a job interview) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-01-29 12:59 +0100
Re: I thought I understood JavaScript till they asked me this on a job interview Bjoern Hoehrmann <bjoern@hoehrmann.de> - 2014-01-29 14:30 +0100
Re: I thought I understood JavaScript till they asked me this on a job interview Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-01-29 15:39 +0100
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