javascript - How to convert an array of UTC dates into milliseconds using JS/Jquery -

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i'm having array of dates:

var ticks = []; ticks = [tue jan 01 2013 00:00:00 gmt-0800 (pst), fri feb 01 2013 00:00:00 gmt-0800 (pst), fri mar 01 2013 00:00:00 gmt-0800 (pst), mon apr 01 2013 00:00:00 gmt-0700 (pdt), wed may 01 2013 00:00:00 gmt-0700 (pdt), sat jun 01 2013 00:00:00 gmt-0700 (pdt), mon jul 01 2013 00:00:00 gmt-0700 (pdt), thu aug 01 2013 00:00:00 gmt-0700 (pdt), sun sep 01 2013 00:00:00 gmt-0700 (pdt)].

how can convert above array of dates millisecond format: below:

[1390000000000, 1395000000000, 1400000000000, 1405000000000, 1410000000000, 1415000000000]

(ps: need format have function takes format display x-axis)

any ideas on how can achieved? thanks!!!!

you map new array date objects:

ticks.map(function ( value ) {     return value.gettime(); });

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