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Programmatically go back to the previous fragment in the backstack
...agmentManager().popBackStack() methods (there are several to choose from)
http://developer.android.com/reference/android/app/FragmentManager.html#popBackStack()
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What is the difference between C, C99, ANSI C and GNU C?
...arthematic library functions)
GNU C: GNU is a unix like operating system (www.gnu.org) & somewhere GNU's project needs C programming language based on ANSI C standard. GNU use GCC (GNU Compiler Collection) compiler to compile the code. It has C library function which defines system calls such a...
Is Random class thread safe?
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It is thread safe, although it wasn't always.
See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6362070 for more details.
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Can Flask have optional URL parameters?
...;userId>/<username>')
def show(userId, username=None):
pass
https://flask.palletsprojects.com/en/1.1.x/quickstart/#unique-urls-redirection-behavior
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Center a column using Twitter Bootstrap 3
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You can also use text-center to center text (and inline elements).
Demo: http://bootply.com/91632
EDIT - As mentioned in the comments, center-block works on column contents and display:block elements, but won't work on the column itself (col-* divs) because Bootstrap uses float.
Update 2018
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How to get box-shadow on left & right sides only
...px -4px rgba(31, 73, 125, 0.8), -12px 0 8px -4px rgba(31, 73, 125, 0.8);
http://jsfiddle.net/YJDdp/
Edit
Add 2 more box-shadows for the top and bottom up front to mask out the that bleeds through.
box-shadow: 0 9px 0px 0px white, 0 -9px 0px 0px white, 12px 0 15px -4px rgba(31, 73, 125, 0.8), -1...
Counting DISTINCT over multiple columns
...umentOutputItems;
This feature is mentioned in the MySQL documentation:
http://dev.mysql.com/doc/refman/5.7/en/group-by-functions.html#function_count-distinct
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How to get the insert ID in JDBC?
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This blog post nicely isolates three main SQL Server "last ID" options:
http://msjawahar.wordpress.com/2008/01/25/how-to-find-the-last-identity-value-inserted-in-the-sql-server/ - haven't needed the other two yet.
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Access data in package subdirectory
...the package setup file to point it your data resources, as per this link:
http://docs.python.org/distutils/setupscript.html#installing-package-data
You can then re-find and use those files using pkg_resources, as per this link:
http://peak.telecommunity.com/DevCenter/PkgResources#basic-resource-...
Reactjs: Unexpected token '
...e that JSX code to javascript or use the in-browser transformator
Look at http://facebook.github.io/react/docs/getting-started.html and take note of the <script> tags, you need those included for JSX to work in the browser.
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