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How to reorder data.table columns (without copying)
I'd like to reorder columns in my data.table x , given a character vector of column names, neworder :
2 Answers
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Find the files that have been changed in last 24 hours
...sub-directories:
find /directory_path -mtime -1 -ls
Should be to your liking
The - before 1 is important - it means anything changed one day or less ago.
A + before 1 would instead mean anything changed at least one day ago, while having nothing before the 1 would have meant it was changed exact...
How to get first and last day of the week in JavaScript
... = new Date(); object. I need to get first and last day of the current week. I need both variants for Sunday and Monday as a start and end day of the week. I am little bit confuse now with a code. Can your help me?
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How to profile a bash shell script slow startup?
My bash shell takes up to 3-4 seconds to start up, while if I start it with --norc it runs immediately.
7 Answers
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How to overload the operator++ in two different ways for postfix a++ and prefix ++a?
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Should look like this:
class Number
{
public:
Number& operator++ () // prefix ++
{
// Do work on this. (increment your object here)
return *this;
}
// You want to m...
What is the JavaScript convention for no operation?
What is the JavaScript convention for no operation? Like a Python pass command.
6 Answers
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Remove empty array elements
...(), which conveniently handles all this for you:
print_r(array_filter($linksArray));
Keep in mind that if no callback is supplied, all entries of array equal to FALSE (see converting to boolean) will be removed. So if you need to preserve elements that are i.e. exact string '0', you will need a c...
UITableViewCell subview disappears when cell is selected
...colors (depends on the product). The user can also select other options (like hard drive capacity, ...).
20 Answers
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Multi-line tooltips in Java?
...f you wrap the tooltip in <html> and </html> tags, you can break lines with <br> tags. See http://www.jguru.com/faq/view.jsp?EID=10653 for examples and discussion.
Or you can use the JMultiLineToolTip class that can be found many places on the net, including
https://github.com...
How to save traceback / sys.exc_info() values in a variable?
I want to save the name of the error and the traceback details into a variable. Here's is my attempt.
5 Answers
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