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What is an existential type?
...versal type ∀X they're saying: You can plug in whatever type you want, I don't need to know anything about the type to do my job, I'll only refer to it opaquely as X.
When someone defines an existential type ∃X they're saying: I'll use whatever type I want here; you wont know anything about the...
How do I get the MAX row with a GROUP BY in LINQ query?
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I like this - do you know if it is as efficient as the other answers?
– noelicus
Aug 25 '16 at 7:57
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Python coding standards/best practices [closed]
In python do you generally use PEP 8 -- Style Guide for Python Code as your coding standards/guidelines? Are there any other formalized standards that you prefer?
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How to send an object from one Android Activity to another using Intents?
...serialization, but it's way faster (and I mean way, WAY faster).
From the docs, a simple example for how to implement is:
// simple class that just has one member property as an example
public class MyParcelable implements Parcelable {
private int mData;
/* everything below here is for im...
Why do people put code like “throw 1; ” and “for(;;);” in front of json responses? [du
...the ECMAScript Fifth Edition standard and Object.defineProperty) currently does not work on Object.prototype or Array.prototype.
But as well as protecting past browsers, it may be that extensions to JavaScript cause more potential leaks of a similar kind in future, and in that case chaff should pro...
How do I combine two data frames?
...data = data1.append(data2, ignore_index=True)
to keep their indexes just dont use the ignore_index keyword ...
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One line ftp server in python
Is it possible to have a one line command in python to do a simple ftp server? I'd like to be able to do this as quick and temporary way to transfer files to a linux box without having to install a ftp server. Preferably a way using built in python libraries so there's nothing extra to install.
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Deep null checking, is there a better way?
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Without the dot it becomes syntactically ambiguous with the conditional (A?B:C) operator. We try to avoid lexical constructs that require us to "look ahead" arbitrarily far in the token stream. (Though, unfortunately, there already are s...
How to find if a given key exists in a C++ std::map
I'm trying to check if a given key is in a map and somewhat can't do it:
14 Answers
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How do I empty an array in JavaScript?
... code will set the variable A to a new empty array. This is perfect if you don't have references to the original array A anywhere else because this actually creates a brand new (empty) array. You should be careful with this method because if you have referenced this array from another variable or pr...