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Java generics - why is “extends T” allowed but not “implements T”?
...lass 'implements' or 'extends'. The constraint possibilities are 'extends' and 'super' - that is, is this class to operate with assignable to that other one (extends), or is this class assignable from that one (super).
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Easiest way to copy a single file from host to Vagrant guest?
...ou ask for the easiest way, I suggest using vagrant-scp. It adds a scp command to vagrant, so you can copy files to your VM like you would normally do with scp.
Install via:
vagrant plugin install vagrant-scp
Use it like so:
vagrant scp <some_local_file_or_dir> [vm_name]:<somewhere_on_...
What is the best way to determine the number of days in a month with JavaScript?
...ve been using this function but I'd like to know what's the most efficient and accurate way to get it.
15 Answers
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Select TreeView Node on right click before displaying ContextMenu
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Depending on the way the tree was populated, the sender and the e.Source values may vary.
One of the possible solutions is to use e.OriginalSource and find TreeViewItem using the VisualTreeHelper:
private void OnPreviewMouseRightButtonDown(object sender, MouseButtonEventArgs e)
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“Unable to find remote helper for 'https'” during git clone
...led when you compile git can cause this.
If you install (lib)curl-devel, and then rebuild/install git, this should solve the problem:
$ yum install curl-devel
$ # cd to wherever the source for git is
$ cd /usr/local/src/git-1.7.9
$ ./configure
$ make
$ make install
This worked for me on Cento...
Convert string to symbol-able in ruby
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@Zack .to_s and .humanize should do the job unless you need to preserve full capitalization.
– Tyler Diaz
Sep 18 '15 at 10:00
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How to access pandas groupby dataframe by key
... answered Feb 6 '13 at 17:00
Andy HaydenAndy Hayden
262k7373 gold badges527527 silver badges485485 bronze badges
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raw vs. html_safe vs. h to unescape html
...s declared on a helper, just like h, so it can only be used on controllers and views.
"SafeBuffers and Rails 3.0" is a nice explanation on how the SafeBuffers (the class that does the html_safe magic) work.
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How to set JVM parameters for Junit Unit Tests?
...ionality for a webstart app that will only run with sufficient heap-space, and will be run internally on Win 7 64-bit machines - so redesigning the tests isn't a practical suggestion.)
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How to convert std::string to LPCSTR?
...: pointer to null terminated char string of char (often a buffer is passed and used as an 'output' param)
LPCWSTR: pointer to null terminated string of const wchar_t
LPWSTR: pointer to null terminated string of wchar_t (often a buffer is passed and used as an 'output' param)
To "convert" a std::s...