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Why use ICollection and not IEnumerable or List on many-many/one-many relationships?
...specific standpoint, lazy loading comes in to play with choosing the type. By default, navigation properties in Entity Framework come with change tracking and are proxies. In order for the dynamic proxy to be created as a navigation property, the virtual type must implement ICollection.
A naviga...
Shell script - remove first and last quote (") from a variable
...t from a larger script. It removes the quotes from the string that is held by a variable. I am doing it using sed, but is it efficient? If not, then what is the efficient way?
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Cron jobs and random times, within given hours
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You can make the arithmetic assignments more readable by dropping the dollar sign and moving the double parens to the left (e.g. ((maxdelay = 14 * 60)) or ((delay = $RANDOM % maxdelay))). The sleep argument still needs to be the way you have it (although you could add spaces, if...
How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
... in /dev is useless, since you already have the name in /sys/class/tty (as by default udev creates the /dev/DEVNAME node). What you are interested about is any "symbolic" link in /dev that points to such device. This is much much harder to find.
– xryl669
May 3...
How do you close/hide the Android soft keyboard using Java?
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To help clarify this madness, I'd like to begin by apologizing on behalf of all Android users for Google's downright ridiculous treatment of the soft keyboard. The reason there are so many answers, each different, for the same simple question is that this API, like many ot...
Difference between HEAD and master
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master is a reference to the end of a branch. By convention (and by default) this is usually the main integration branch, but it doesn't have to be.
HEAD is actually a special type of reference that points to another reference. It may point to master or it may not (it w...
SQL SELECT speed int vs varchar
...e space usage of different date types:
int fields occupy between 2 and 8 bytes, with 4 being usually more than enough ( -2147483648 to +2147483647 )
character types occupy 4 bytes plus the actual strings.
share
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List of installed gems?
Is there a Ruby method I can call to get the list of installed gems?
11 Answers
11
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ByteBuffer.allocate() vs. ByteBuffer.allocateDirect()
... far as the operating
system is concerned, are contiguous
sequences of bytes. It's no surprise
then that only byte buffers are
eligible to participate in I/O
operations. Also recall that the
operating system will directly access
the address space of the process, in
this case the JVM...
OS X Terminal Colors [closed]
...diting .bash_profile, start a Terminal and force the changes to take place by executing:
source ~/.bash_profile
Then go to Terminal > Preferences, click on the Profiles tab and then the Text subtab and check Display ANSI Colors.
Verified on Sierra (May 2017).
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