Monthly Archives: July 2016
MySQL: NULL value comparison issue
As a PHP developer I was surprised when query like this: SELECT IF(‘Bonus’ <> NULL, 1, 0) returned 0 Any arithmetic comparison with NULL does not return true or false, but returns NULL instead As an alternative guys propose <=> operator called NULL – safe equal to operator. So my query will look like this: SELECT IF(!(‘Bonus’ <=> […]
background-attachment CSS property
Recently I came into and issue. I checked background size on Chrome devtools and it looked okay: But then when I looked on the iPhone gadget: background looked horribly, it was zoomed: After a small search I found explanation (http://caniuse.com/ – feat=background-attachment) . By the fact that mobile browser does not support background-attachment: fixed property. So Chrome devtools(51.0.2704.106 […]
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I am going to write interesting and useful posts only here. Hopefully I will cope with this!