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!!()

Forums: Javascript
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jiangdy
 
Reply Thu 5 Dec, 2013 07:40 am
why use two ! in the following code ? why use them ?

!!( typeof document !== "undefined" && document && document.getElementById )
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Type: Question • Score: 0 • Views: 600 • Replies: 1
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trying2learn
 
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Reply Thu 5 Dec, 2013 07:47 am
@jiangdy,
You are fos.
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