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What does “Document-oriented” vs. Key-Value mean when talking about MongoDB vs Cassandra?
... opaque, the store doesn't know anything about them. This allows very fast read and write operations (a simple disk access) and I see this model as a kind of non volatile cache (i.e. well suited if you need fast accesses by key to long-lived data).
A document-oriented database extends the previous ...
How can prepared statements protect from SQL injection attacks?
... the effect is the same. PREPARE creates a fixed named statement that is already parsed (i.e. the statement is not going to change any more regardless of the input) while EXECUTE will run the named statement binding the parameters. Since PREPARE only has session duration, it really looks like it is...
Android: What's the difference between Activity.runOnUiThread and View.post?
What's the difference between Activity.runOnUiThread and View.post , could someone, please, explain?
4 Answers
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Is the 'override' keyword just a check for a overridden virtual method?
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* note: the output parameter is sometimes of different, but related type. Read about covariant and contravariant transformations if interested.
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Default value of a type at Runtime [duplicate]
... or generic type argument when all he has is a Type instance at runtime. I read his question the same as codeka.
– Josh
Mar 22 '10 at 6:19
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CSS z-index paradox flower
... some obvious mistake, but can't seem to figure it out). Either way, after reading your question I - as with every paradox - wondered why it's only an apparent impossibility, rather than a real one. Another few seconds me realize that in real life the leaves are rotated a bit, thus allowing such a t...
How do I squash two non-consecutive commits?
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Initially, I read it as "rebase D onto A, squash D into A, then rebase B onto DA". It's not clear from the answer that this can be done by reordering lines in a text editor.
– Victor Sergienko
May 31...
Where is a complete example of logging.config.dictConfig?
...e, beautiful YAML snippets in the python logging.config docs just can't be read directly. Bummer.
– JimB
May 17 '18 at 18:19
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When are you truly forced to use UUID as part of the design?
... MD5 hash functions respectively, to combine a namespace with a piece of already unique data to generate a UUID. This will, for example, allow you to produce a UUID from a URL. Collisions here are only possible if the underlying hash function also has a collision.
Version 1 UUIDs are the most commo...
How to watch for array changes?
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From reading all the answers here, I have assembled a simplified solution that does not require any external libraries.
It also illustrates much better the general idea for the approach:
function processQ() {
// ... this will...