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What is the parameter “next” used for in Express?
...on in the app. The next() function is not a part of the Node.js or Express API, but is the third argument that is passed to the middleware function. The next() function could be named anything, but by convention it is always named “next”.
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What does it mean to “program to an interface”?
...als of an object or data structure. Use the Abstract Program Interface, or API, to interact with your data. In Java or C# that means using public properties and methods instead of raw field access. For C that means using functions instead of raw pointers.
EDIT: And with databases it means using vie...
How should one use std::optional?
...I should use it or how I should use it.
Consider when you are writing an API and you want to express that "not having a return" value is not an error. For example, you need to read data from a socket, and when a data block is complete, you parse it and return it:
class YourBlock { /* block header...
Best practices: throwing exceptions from properties
...Forms and WPF for example) - dealing with exceptions in such contexts can rapidly become problematic.
Property getters are automatically evaluated by debuggers when you watch or inspect an object. An exception here can be confusing and slow down your debugging efforts. It's also undesirable to perfo...
Git cherry pick vs rebase
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git-rebase uses the same api as the cherry-picking does in the codebase, iirc
– alternative
Dec 28 '12 at 17:47
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Difference between sh and bash
...#!/bin/bash.
Analogy:
Shell is like an interface or specifications or API.
sh is a class which implements the Shell interface.
Bash is a subclass of the sh.
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Big O, how do you calculate/approximate it?
...oop, as function calls can do > O(1) work themselves. In the C standard APIs for instance, bsearch is inherently O(log n), strlen is O(n), and qsort is O(n log n) (technically it has no guarantees, and quicksort itself has a worst case complexity of O(n²), but assuming your libc author isn't a m...
Difference between static and shared libraries?
...pecifically, equivalent caller-facing functionality in semantic use of the API (application programming interface: function signatures and variables including types), but implementation-side functionality may differ in more than perf.: e.g. function always logs to file -> also log to TCP server:p...
How to save CSS changes of Styles panel of Chrome Developer Tools?
... extension listening for any changes and saving them. That's if there's an API or process we can hook on... haven't looked it up yet.
– Carles Alcolea
Mar 27 '19 at 10:58
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Using PUT method in HTML form
... @DaBlick: But not for XMLHttpRequests? If so then relying on the fetch API should be more standardized.
– hakre
Jan 10 '19 at 14:37
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