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Difference between Covariance & Contra-variance
...and I rephrased following examples.
What does “consistency” mean? The idea is to design type-safe type hierarchies with highly substitutable types. The key to get this consistency is sub type based conformance, if you work in a statically typed language. (We'll discuss the Liskov Substitution P...
What is the difference between the kernel space and the user space?
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@roottraveller: I'm not sure what gave you that idea, but no, not at all. At the same time, a user-space process will normally have some (more or less hidden) kernel-space memory, so (for example) your process will have a user-space stack, and a kernel-space stack that's u...
Replacing spaces with underscores in JavaScript?
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You didn't see anyone do it as it's a terrible idea. Check out this other SO question for more.
– user9016207
May 15 '18 at 19:05
add a comment
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Exporting APK from eclipse (ADT) silently crashes
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No idea why but this also worked for me on Ubuntu Linux (Dell XPS13 running Project Sputnik distro with latest ADT Bundle). Problem started without any changes or warning, one day it worked the next it didn't. Increase to heap s...
Why would one use the Publish/Subscribe pattern (in JS/jQuery)?
...lication. You can reuse it in different applications, so it’s not a good idea to couple it with the View of a single application, where you want to show it, because usually in the different applications you have different views. So it’s a good idea to use publish/subscribe for the Model-View com...
AngularJS : automatically detect change in model
...tting up (potentially multiple) ng-change hooks on input controls a better idea?
– Alec
Mar 15 '13 at 3:42
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Case objects vs Enumerations in Scala
... patterns.
To start, let's make sure we are working from the same basic idea of what an enumeration is. Let's define an enumeration mostly in terms of the Enum provided as of Java 5 (1.5):
It contains a naturally ordered closed set of named members
There is a fixed number of members
Membe...
Regex to test if string begins with http:// or https://
...ut did work without ^)
Didn't need to escape the // though might be a good idea.
Here's the full RegularExpressionValidator if you need it:
<asp:RegularExpressionValidator ID="revURLHeaderEdit" runat="server"
ControlToValidate="txtURLHeaderEdit"
ValidationExpression="[Hh][Tt][Tt][Pp]...
What's the best way of scraping data from a website? [closed]
...jax before Jesse James Garrett named it ajax, before XMLHTTPRequest was an idea. Before jQuery, before json. I'm in my mid-30's, that's apparently considered ancient for this business.
I've written large scale crawling/scraping systems twice, once for a large team at a media company (in Perl) and r...
how to remove the dotted line around the clicked a element in html
...tline to be transparent still harms the accessibility of your website. The idea is that it provides a visual indicator that an element is focused. If you make it non-visible, that indicator is lost. More info here: outlinenone.com
– ktbee
Oct 27 '19 at 14:41
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