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How to center horizontally div inside parent div

... I am assuming the parent div has no width or a wide width, and the child div has a smaller width. The following will set the margin for the top and bottom to zero, and the sides to automatically fit. This centers the div. div#child { margin: 0 auto; } ...
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MySQL Query - Records between Today and Last 30 Days

...') FROM mytable WHERE create_date BETWEEN CURDATE() - INTERVAL 30 DAY AND CURDATE() Also note that CURDATE() returns only the DATE portion of the date, so if you store create_date as a DATETIME with the time portion filled, this query will not select the today's records. In this case, you'll...
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How to get screen width without (minus) scrollbar?

I have an element and need it's width without(!) vertical scrollbar. 8 Answers 8 ...
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What's the need of array with zero elements?

...n the Linux kernel code I found the following thing which I can not understand. 5 Answers ...
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What is __declspec and when do I need to use it?

... seen instances of __declspec in the code that I am reading. What is it? And when would I need to use this construct? 6 A...
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Sass and combined child selector

I've just discovered Sass, and I've been so excited about it. 2 Answers 2 ...
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What is the difference between NaN and None?

I am reading two columns of a csv file using pandas readcsv() and then assigning the values to a dictionary. The columns contain strings of numbers and letters. Occasionally there are cases where a cell is empty. In my opinion, the value read to that dictionary entry should be None but instead ...
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What are the special dollar sign shell variables?

...shell (not subshell). $_ most recent parameter (or the abs path of the command to start the current shell immediately after startup). $IFS is the (input) field separator. $? is the most recent foreground pipeline exit status. $! is the PID of the most recent background command. $0 is the name of the...
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In tmux can I resize a pane to an absolute value

... The -x and -y options for resize-pane were introduced in tmux 1.8. – Chris Johnsen Apr 23 '13 at 6:10 ...
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Android: What's the difference between Activity.runOnUiThread and View.post?

What's the difference between Activity.runOnUiThread and View.post , could someone, please, explain? 4 Answers ...