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What are the differences between Deferred, Promise and Future in JavaScript?
...scripts that have networks of dependencies, and providing user feedback to form data in a non-blocking manner.
Indeed, compare the pure callback form of doing something after loading CodeMirror in JS mode asynchronously (apologies, I've not used jQuery in a while):
/* assume getScript has signatu...
What is the right way to override a setter method in Ruby on Rails?
...Rails 4.2 due to this change: github.com/rails/rails/commit/… Previously form helpers would call the untypecast value of the field and not call your custom getter. Now they call your method, and so will produce confusing results in your forms depending on how you're overriding the value.
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400 vs 422 response to POST of data
...ng on. Let's say I have a end point that allows POST'ing purchases in JSON format. It looks like this:
9 Answers
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Simple C example of doing an HTTP POST and consuming the response
...reak style) so that's why those lines have \r\n at the end.
A URL has the form of http://host:port/path?query_string
There are two main ways of submitting a request to a website:
GET: The query string is optional but, if specified, must be reasonably short. Because of this the header could just ...
What is the difference between statically typed and dynamically typed languages?
...hat type each variable is (e.g.: Java, C, C++); other languages offer some form of type inference, the capability of the type system to deduce the type of a variable (e.g.: OCaml, Haskell, Scala, Kotlin)
The main advantage here is that all kinds of checking can be done by the compiler, and therefor...
Are (non-void) self-closing tags valid in HTML5?
...HTML failed before HTML 5 was even on the horizon, and you can't have long form empty elements because browser error correction that predated XHTML would do things like treating </br> as <br> so <br></br> would be a double line break. (and backwards compatibility with real wo...
How many bytes does one Unicode character take?
... useful in computing systems we need to choose a representation for this information. Those are the various unicode encodings, such as utf-8, utf-16le, utf-32 etc. They are distinguished largely by the size of of their codeunits. UTF-32 is the simplest encoding, it has a codeunit that is 32bits, whi...
Citing the author of a blockquote using Markdown syntax
...people or organization) or an URL reference, or a reference in abbreviated form as per the conventions used for the addition of citation metadata.
– Zelphir Kaltstahl
Oct 31 '15 at 16:29
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Validate that a string is a positive integer
...r 9,007,199,254,740,992; for instance, 1234567890123456789 will fail). The former is an easy fix, the latter two not so much.
Regular Expression
The other approach is to test the characters of the string via a regular expression, if your goal is to just allow (say) an optional + followed by either...
Applicatives compose, monads don't
... Is it true, that for any monads m and n you can always write a monad transformer mt, and operate in n (m t) using mt n t? So you can always compose monads, it is just more complicated, using transformers?
– ron
Jun 19 '12 at 11:11
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