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Easiest way to flip a boolean value?
I just want to flip a boolean based on what it already is. If it's true - make it false. If it's false - make it true.
13 A...
Is there a limit on how much JSON can hold?
I am using jquery, JSON, and AJAX for a comment system. I am curious, is there a size limit on what you can send through/store with JSON? Like if a user types a large amount and I send it through JSON is there some sort of maximum limit?
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Why are arrays covariant but generics are invariant?
...rsions of Java and C# did not include generics (a.k.a. parametric polymorphism).
In such a setting, making arrays invariant rules out useful polymorphic programs.
For example, consider writing a function to shuffle an array, or a function that tests two arrays for equality using the Object.eq...
What are the file limits in Git (number and size)?
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This message from Linus himself can help you with some other limits
[...] CVS, ie it really ends up being pretty much oriented to a "one file
at a time" model.
Which is nice in that you can have a million files, and ...
When should you not use virtual destructors?
Is there ever a good reason to not declare a virtual destructor for a class? When should you specifically avoid writing one?
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Express.js: how to get remote client address
...headers['x-forwarded-for'] || req.connection.remoteAddress;
If the proxy isn't 'yours', I wouldn't trust the 'x-forwarded-for' header, because it can be spoofed.
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Arguments or parameters? [duplicate]
... things passed as parameters.
void foo(int bar) { ... }
foo(baz);
In this example, bar is a parameter for foo. baz is an argument passed to foo.
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What is the difference between a shim and a polyfill?
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A shim is any piece of code that performs interception of an API call and provides a layer of abstraction. It isn't necessarily restricted to a web application or HTML5/CSS3.
A polyfill is a type of shim that retrofits legacy browse...
What are DDL and DML?
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More information see here: MySQL What is DDL, DML and DCL?, the original is as follows:
DDL
DDL is short name of Data Definition Language, which deals with
database schemas and descriptions, of how the data should reside in
the database.
CREA...
How can I make a weak protocol reference in 'pure' Swift (without @objc)
weak references don't seem to work in Swift unless a protocol is declared as @objc , which I don't want in a pure Swift app.
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