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What does .SD stand for in data.table in R
.SD looks useful but I do not really know what I am doing with it. What does it stand for? Why is there a preceding period (full stop). What is happening when I use it?
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Access Denied for User 'root'@'localhost' (using password: YES) - No Privileges?
I am continuously receiving this error.
20 Answers
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ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
Why am I getting this database error when I update a table?
14 Answers
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Rails 3 migrations: Adding reference column?
If I create a new rails 3 migration with (for example)
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Get String in YYYYMMDD format from JS date object?
I'm trying to use JS to turn a date object into a string in YYYYMMDD format. Is there an easier way than concatenating Date.getYear() , Date.getMonth() , and Date.getDay() ?
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Git push error: Unable to unlink old (Permission denied)
In the remote server I have a post-receive hook set up in order to make a git checkout of my repository:
14 Answers
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Auto line-wrapping in SVG text
I would like to display a <text> in SVG what would auto-line-wrap to the container <rect> the same way as HTML text fills <div> elements. Is there a way to do it? I don't want to position lines sparately by using <tspan> s.
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What's the difference between and , and ?
What's the difference between <b> and <strong> , <i> and <em> in HTML/XHTML? When should you use each?
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How to print the ld(linker) search path
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You can do this by executing the following command:
ld --verbose | grep SEARCH_DIR | tr -s ' ;' \\012
gcc passes a few extra -L paths to the linker, which you can list with the following command:
gcc -print-search-dirs | sed '/^lib/b 1;d;:1;s,/[^/....
How many levels of pointers can we have?
How many pointers ( * ) are allowed in a single variable?
14 Answers
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