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How to create GUID / UUID?
...browsers, how "random" and seeded the built-in random number generator is, etc.
55 Answers
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Redis strings vs Redis hashes to represent JSON: efficiency?
...ws you to store more complicated Objects (with multiple layers of nesting, etc.) Option 3 is used when you really care about not polluting the main key namespace (i.e. you don't want there to be a lot of keys in your database and you don't care about things like TTL, key sharding, or whatever).
If...
Understanding slice notation
...','t','h']
>>> p[2:4] # Take two items off the front
['t','h']
# etc.
The first rule of slice assignment is that since slicing returns a list, slice assignment requires a list (or other iterable):
>>> p[2:3]
['t']
>>> p[2:3] = ['T']
>>> p
['P','y','T','h','o...
What's the difference between deadlock and livelock?
...eadlock: situation where nobody progress, doing nothing (sleeping, waiting etc..). CPU usage will be low;
Livelock: situation where nobody progress, but CPU is spent on the lock mechanism and not on your calculation;
Starvation: situation where one procress never gets the chance to run; by pure ba...
Javascript object Vs JSON
...t Literal notation is where the key contains a special character (if, :, - etc). It is worth noting that a key in JSON must be enclosed in double quotes.
If I convert the above object to JSON using var jSonString = JSON.stringify(testObject);, what is the difference between the 2 (JS obj and JSON...
How to pass parameters correctly?
...::forward may be called only once. I've seen people putting it into loops, etc. and since this answer will be seen by a lot of beginners, there should IMHO be a fat "Warning!"-label to help them avoid this trap.
– Daniel Frey
Mar 25 '13 at 6:17
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What does if __name__ == “__main__”: do?
...add non-trivial system overhead to create and destroy the extra processes, etc.
– Mr Fooz
Feb 19 '19 at 16:16
4
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valueOf() vs. toString() in Javascript
...on object of one of the primitive types (ie. Number(), Boolean(), String() etc.)
Conversion To A Primitive
When attempting to convert non-primitive types to primitives to be operated upon, the abstract operation ToPrimitive is called with an optional "hint" of 'number', or 'string'. If the hint ...
What is the purpose of the -m switch?
...m more is possible, like working with modules which are part of a package, etc. That's what the rest of PEP 338 is about. Read it for more info.
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Java 8: Lambda-Streams, Filter by Method with Exception
...t; R collect(Collector<? super T, A, R> collector) throws X;
// etc
}
class StreamAdapter<T, X extends Throwable> implements ThrowingStream<T, X> {
private static class AdapterException extends RuntimeException {
public AdapterException(Throwable cause) {
...