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What's the difference between HEAD, working tree and index, in Git?
Can someone tell me the difference between HEAD, working tree and index, in Git?
5 Answers
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Turn a simple socket into an SSL socket
I wrote simple C programs, which are using sockets ('client' and 'server').
(UNIX/Linux usage)
4 Answers
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Equivalent C++ to Python generator pattern
I've got some example Python code that I need to mimic in C++. I do not require any specific solution (such as co-routine based yield solutions, although they would be acceptable answers as well), I simply need to reproduce the semantics in some manner.
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What's the complete range for Chinese characters in Unicode?
U+4E00..U+9FFF is part of the complete set,but not all
6 Answers
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mongoDB/mongoose: unique if not null
I was wondering if there is way to force a unique collection entry but only if entry is not null .
e
Sample schema:
4 Answ...
How to validate phone numbers using regex
I'm trying to put together a comprehensive regex to validate phone numbers. Ideally it would handle international formats, but it must handle US formats, including the following:
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How to create a density plot in matplotlib?
In R I can create the desired output by doing:
5 Answers
5
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Sending POST data in Android
I'm experienced with PHP, JavaScript and a lot of other scripting languages, but I don't have a lot of experience with Java or Android.
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Is there a REAL performance difference between INT and VARCHAR primary keys?
Is there a measurable performance difference between using INT vs. VARCHAR as a primary key in MySQL? I'd like to use VARCHAR as the primary key for reference lists (think US States, Country Codes) and a coworker won't budge on the INT AUTO_INCREMENT as a primary key for all tables.
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How to store a list in a column of a database table
So, per Mehrdad's answer to a related question , I get it that a "proper" database table column doesn't store a list. Rather, you should create another table that effectively holds the elements of said list and then link to it directly or through a junction table. However, the type of list I wa...