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What exactly is the meaning of an API? [closed]
I've searched for the definition of an API in a programming language and I am still finding it hard to understand.
13 Answe...
When is null or undefined used in JavaScript? [duplicate]
I am really confused as to when JavaScript returns null or undefined . Also different browsers seem to be returning these differently.
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When should we implement Serializable interface?
...at's this "serialization" thing all about?:
It lets you take an object or group of
objects, put them on a disk or send
them through a wire or wireless
transport mechanism, then later,
perhaps on another computer, reverse
the process: resurrect the original
object(s). The basic mechan...
Running Bash commands in Python
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Don't use os.system. It has been deprecated in favor of subprocess. From the docs: "This module intends to replace several older modules and functions: os.system, os.spawn".
Like in your case:
bashCommand = "cwm --rdf test.rdf --ntriples > test.nt"
import subprocess
pro...
Determine the type of an object?
Is there a simple way to determine if a variable is a list, dictionary, or something else? I am getting an object back that may be either type and I need to be able to tell the difference.
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What is the best place for storing uploaded images, SQL database or disk file system? [closed]
... (This is another question, how to resize the images on the server side before storing. Maybe someone can please drop a .NET resource for that in the comment or so).
I wonder now what the best place for storing uploaded images is.
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What is a database transaction?
Can someone provide a straightforward (but not simpler than possible) explanation of a transaction as applied to computing (even if copied from Wikipedia)?
...
JavaScript unit test tools for TDD
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Karma or Protractor
Karma is a JavaScript test-runner built with Node.js and meant for unit testing.
The Protractor is for end-to-end testing and uses Selenium Web Driver to drive tests.
Both have been made by the Angular team. You...
XPath to find elements that does not have an id or class
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Pretty straightforward:
//tr[not(@id) and not(@class)]
That will give you all tr elements lacking both id and class attributes. If you want all tr elements lacking one of the two, use or instead of and:
//tr[not(@id) or not(@class)]
Wh...
What is a Maven artifact?
...An artifact is a file, usually a JAR, that gets deployed to a Maven repository.
A Maven build produces one or more artifacts, such as a compiled JAR and a "sources" JAR.
Each artifact has a group ID (usually a reversed domain name, like com.example.foo), an artifact ID (just a name), and a version...