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Test if a variable is set in bash when using “set -o nounset”
...sh
$ /bin/bash --version | head -1
GNU bash, version 4.1.2(1)-release (x86_64-redhat-linux-gnu)
$ set -o nounset
If you want a non-interactive script to print an error and exit if a variable is null or not set:
$ [[ "${HOME:?}" ]]
$ [[ "${IAMUNBOUND:?}" ]]
bash: IAMUNBOUND: parameter null or not...
Static link of shared library function in gcc
... of the binary you want make portable, for example: nmap
./cde_2011-08-15_64bit nmap
The program will read all of libs linked to nmap and its dependencias and it will save all of them in a folder called cde-package/ (in the same directory that you are).
Finally, you can compress the folder and ...
Google Maps API v3: How do I dynamically change the marker icon?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How to select rows that have current day's timestamp?
...E()
I guess using DATE still uses INDEX.
see the execution plan on the DEMO
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Find index of last occurrence of a substring in a string
....
Example
The following example shows the usage of rindex() method.
Live Demo
!/usr/bin/python
str1 = "this is string example....wow!!!";
str2 = "is";
print str1.rindex(str2)
print str1.index(str2)
When we run above program, it produces following result −
5
2
Ref: Python String rindex() ...
How to track down log4net problems
...going on on the inside. For example, I've got a console appender and a database appender in my project. I made a few changes to the database and the code, and now the database appender doesn't work anymore. I'll figure out why eventually, but it would help a lot if I could see what's going on inside...
Show an image preview before upload
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Bootstrap full-width text-input within inline-form
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Build unsigned APK file with Android Studio
...w in Explorer.
If you need more details please visit and check the live demo http://javaant.com/how-to-make-apk-file-in-android-studio/#.VwzedZN96Hs
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Can I run multiple versions of Google Chrome on the same machine? (Mac or Windows)
...tically unpacks the files and duplicates the profile from a pre-configured base directory.
By default:
The Chrome binaries are placed in subfolders of C:\Chrome\.
The User profiles are created in C:\Chrome\User Data\.
The user profiles will be duplicated from the directory as specified in the sFo...