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What is Java String interning?
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http://docs.oracle.com/javase/7/docs/api/java/lang/String.html#intern()
Basically doing String.intern() on a series of strings will ensure that all strings having same contents share same memory. So if you have list of names...
Create an index on a huge MySQL production table without table locking
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[2017] Update: MySQL 5.6 has support for online index updates
https://dev.mysql.com/doc/refman/8.0/en/innodb-online-ddl-operations.html#online-ddl-index-syntax-notes
In MySQL 5.6 and higher, the table remains available for read and write operations while the index is being created o...
How to clone a case class instance and change just one field in Scala?
...It turns out it is just a few lines of code in the scalaz library:
/** http://stackoverflow.com/a/5597750/329496 */
case class Lens[A, B](get: A => B, set: (A, B) => A) extends ((A) => B) with Immutable {
def apply(whole: A): B = get(whole)
def mod(a: A, f: B => B) = set(a...
How can I get a side-by-side diff when I do “git diff”?
...variables.
configuring the external diff tool via git config
See also:
https://git-scm.com/book/en/v2/Customizing-Git-Git-Configuration
git diff --help
http://www.pixelbeat.org/programming/diffs/
When doing a git diff, Git checks both the settings of above environment variables and its .gitcon...
GLib compile error (ffi.h), but libffi is installed
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Check your GCC version and note this entry in the Debian Bug Archive: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=523869
It was the final solution to my particular issue (it looked exactly like what you report, but couldn't be solved with the solution above)... my problem had nothing to ...
Installing specific laravel version with composer create-project
...way of installing Laravel is via composer command. From the laravel docs ( http://laravel.com/docs/quick ), it shows that we can install it with this:
...
What does “%.*s” mean in printf?
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See: http://www.cplusplus.com/reference/clibrary/cstdio/printf/
.* The precision is not specified in the format string, but as an additional integer value argument preceding the argument that has to be formatted.
s String of c...
Notepad++ htmltidy - unable to find libtidy.dll
...re is no link on the downloads page and making a educated stab at a URL of http://notepad-plus-plus.org/download/v5.9.html returns a 404).
There is a 'dll' link on the HTML Tidy SourceForge page (http://tidy.sourceforge.net/) dated 2006; but it returns a DNS error.
Google did return a hit on a sit...
How to use ADB Shell when Multiple Devices are connected? Fails with “error: more than one device an
...mand to specify the device, for example:
adb -s 7f1c864e shell
See also http://developer.android.com/tools/help/adb.html#directingcommands
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A JRE or JDK must be available in order to run Eclipse. No JVM was found after searching the followi
...ing in JDK's JRE installation. After I reinstalled the standalone JRE from http://java.com, overwriting the old one, the GlassFish installer continued and also Eclipse was able to start flawlessly without those two lines in eclipse.ini.
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