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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...
Why do you need to create a cursor when querying a sqlite database?
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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
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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...
API Keys vs HTTP Authentication vs OAuth in a RESTful API
...how to go about securing the API, I found a few different opinions on what form to use. I've seen some resources say HTTP-Auth is the way to go, while others prefer API keys, and even others (including the questions I found here on SO) swear by OAuth.
...
Regex to validate date format dd/mm/yyyy
...ded in his answer and also here and it seems to work.
Edit February 14th 2019: I've removed a comma that was in the regex which allowed dates like 29-0,-11
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What does principal end of an association means in 1:1 relationship in Entity framework
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Detecting that the browser has no mouse and is touch-only
...ght after he's made the effort to pinpoint your now crowded UI?
In bullet form, quoting stucox at https://github.com/Modernizr/Modernizr/issues/869#issuecomment-15264101
We want to detect the presence of a mouse
Ae probably can't detect before an event is fired
As such, what we're detect...