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Adding a new value to an existing ENUM Type
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NOTE if you're using PostgreSQL 9.1 or later, and you are ok with making changes outside of a transaction, see this answer for a simpler approach.
I had the same problem few days ago and found this post. So my answer can be helpful for someone who is looking for solut...
Create a “with” block on several context managers? [duplicate]
...ects you acquire via context manager, for instance A lock, a db connection and an ip socket.
You can acquire them by:
5 Ans...
How to add Action Bar from support library into PreferenceActivity?
...tivity class for creating activities with Action Bar on older versions of Android.
8 Answers
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Best way to check for nullable bool in a condition expression (if …)
I was wondering what was the most clean and understandable syntax for doing condition checks on nullable bools.
12 Answers...
Install Node.js on Ubuntu
...ll the software-properties-common
package for the add-apt-repository command to work: sudo apt-get
install software-properties-common
As of Node.js v0.10.0, the nodejs package from Chris Lea's repo
includes both npm and nodejs-dev.
Don't give sudo apt-get install nodejs npm just sudo ap...
Code formatting shortcuts in Android Studio for Operation Systems
I have started developing with Android Studio . In Eclipse I was using Ctrl + Shift + F , but in Android Studio it does not work. It will be different.
...
How to link to part of the same document in Markdown?
I am writing a large Markdown document and would like to place a table of contents of sorts at the beginning that will provide links to various locations in the document. How can I do this?
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How to show first commit by 'git log'?
...’s initial commit, gitk, some initially separate tools, git-gui, gitweb, and git-p4). In this case, we know that e83c516 is the one we are probably interested in. It is both the earliest commit and a root commit.
It is not so simple in the general case.
Imagine that libfoo has been in developmen...
Is gcc std::unordered_map implementation slow? If so - why?
... performance critical software in C++. There we need a concurrent hash map and implemented one. So we wrote a benchmark to figure out, how much slower our concurrent hash map is compared with std::unordered_map .
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How to return 2 values from a Java method?
...sider creating a class that represents the result that you want to return, and return an instance of that class. Give the class a meaningful name. The benefits of this approach over using an array are type safety and it will make your program much easier to understand.
Note: A generic Pair class, a...