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How do I use extern to share variables between source files?
I know that global variables in C sometimes have the extern keyword. What is an extern variable? What is the declaration like? What is its scope?
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HashMap to return default value for non-found keys?
Is it possible to have a HashMap return a default value for all keys that are not found in the set?
14 Answers
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How to connect to Mysql Server inside VirtualBox Vagrant?
I mounted a new VirtualBox Machine with Vagrant, and inside that VM I installed Mysql Server. How can I connect to that server outside the vm? I already forward the port 3306 of the Vagrantfile , but when I try to connect to the mysql server, it`s resposts with the error:
'reading initial communica...
How can I tell how many objects I've stored in an S3 bucket?
Unless I'm missing something, it seems that none of the APIs I've looked at will tell you how many objects are in an S3 bucket / folder(prefix). Is there any way to get a count?
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The name 'InitializeComponent' does not exist in the current context
...roject in Visual Studio 2010 SP1 and select "WPF Application" and tries to build the generated application, I get the error
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Remove/Add Line Breaks after Specific String using Sublime Text
Using Sublime Text 2 - Is it possible to insert a line break /text return after a specific String in a text file e.g. by using the Find ‣ Replace tool?
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How to remove multiple indexes from a list at the same time? [duplicate]
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You need to do this in a loop, there is no built-in operation to remove a number of indexes at once.
Your example is actually a contiguous sequence of indexes, so you can do this:
del my_list[2:6]
which removes the slice starting at 2 and ending just before 6.
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How does Python 2 compare string and int? Why do lists compare as greater than numbers, and tuples g
The following snippet is annotated with the output ( as seen on ideone.com ):
2 Answers
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How to access a dictionary element in a Django template?
I would like to print out the number of votes that each choice got. I have this code in a template:
8 Answers
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Alternate output format for psql
I am using PostgreSQL 8.4 on Ubuntu. I have a table with columns c1 through cN . The columns are wide enough that selecting all columns causes a row of query results to wrap multiple times. Consequently, the output is hard to read.
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