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Why do some functions have underscores “__” before and after the function name?
...for Python Code:
Descriptive: Naming Styles
The following special forms using leading or trailing underscores are
recognized (these can generally be combined with any case convention):
_single_leading_underscore: weak "internal use" indicator. E.g. from M import * does not import ...
Difference between a theta join, equijoin and natural join
...ct differences are fine, I want to show how the relational algebra is transformed to SQL and what the actual value of the 3 concepts is.
The key concept in your question is the idea of a join. To understand a join you need to understand a Cartesian Product (the example is based on SQL where the eq...
REST API Authentication
...ild an API for the application to facilitate interaction with from any platform (Web App, Mobile App). What I'm not understanding is that when using the REST API, how do we authenticate the user.
...
How do I print the elements of a C++ vector in GDB?
...elements of an array starting at pointer P is:
print P@N
Or, in a short form (for a standard .gdbinit):
p P@N
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Why do you need to create a cursor when querying a sqlite database?
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Equivalent of varchar(max) in MySQL?
...data page an overflow page is allocated and the previous page points to it forming a linked list. Unlike TEXT, NTEXT, and BLOB the varchar(max) column type supports all the same query semantics as other column types.
So varchar(MAX) really means varchar(AS_MUCH_AS_I_WANT_TO_STUFF_IN_HERE_JUST_KEEP_G...
Different floating point result with optimization enabled - compiler bug?
.../Redhat 5 and CentOS/Redhat 6. I compiled many my programs under these platforms, I am worry about that will cause unexpected bugs inside my programs.
– Bear
Sep 22 '11 at 16:16
...
NodeJS: Saving a base64-encoded image to disk
...
this is my full solution which would read any base64 image format and save it in the proper format in the database:
// Save base64 image to disk
try
{
// Decoding base-64 image
// Source: http://stackoverflow.com/questions/20267939/nodejs-write-base64-ima...
What does iota of std::iota stand for?
...rom the law, till all be fulfilled.
The OED gives “iote” as another form of “jot”, which (like “iota”) descends from the Greek word “ἰῶτα”, which is the Greek name for the letter in question. Why did Featley change “iote” to “iota”? Sadly, I don't have a copy of Clav...
`levels
...;-`(factor(x), y))
It's kind of beautiful that this pure-functional transformation (up until the very end, where the assignment happens) is equivalent to what an assignment would be in an imperative language. If I remember correctly this construct in functional languages is called a lens.
But the...