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How much size “Null” value takes in SQL Server
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@Martin Smith: I didn't know that. That makes things more complicated because if I understand it correctly it means that making a column nullable doesn't increase the storage space required (because the null bitmap is always present) unless that column is also in an index and t...
How to create a bash script to check the SSH connection?
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An even more concise form of #1: ssh -q user@downhost exit | echo $? pipe the connection result into echo
– philn5d
Nov 30 '18 at 21:22
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Where did the name `atoi` come from?
...toi as meaning Ascii to Integer.
So even if there isn't any documentation more official than man pages indicating that atoi means Ascii to Integer (I suspect there is and I just haven't been able to locate it), it's been Ascii to Integer by convention at least since 1971.
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PHP best way to MD5 multi-dimensional array?
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Return 0 if field is null in MySQL
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How to rollback just one step using rake db:migrate
...rations where n is the number of recent migrations you want to rollback.
More references here.
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How can I format patch with what I stash away
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Private vs Public in Cache-Control
... the logo in this page) cache-control: public might be better, because the more people that cache it, the less bandwidth you'll need. If it's something that is related to the connected user (for example, the HTML in this page includes my username, so it won't be useful to anyone else) cache-control:...
The way to check a HDFS directory's size?
...dfs dfs -du [-s] [-h] URI [URI …]
You can also run hadoop fs -help for more info and specifics.
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How do I paste multi-line bash codes into terminal and run it all at once?
... a solution to this question and I think this is the easiest approach, and more flexible/forgiving...
If you'd like to paste multiple lines from a website/text editor/etc., into bash, regardless of whether it's commands per line or a function or entire script... simply start with a ( and end with a...