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What is the difference between concurrency, parallelism and asynchronous methods?
...y an asynchronous method call is normally used for a process that needs to do work away from the current application and we don't want to wait and block our application awaiting the response.
For example, getting data from a database could take time but we don't want to block our UI waiting for th...
Loading/Downloading image from URL on Swift
...k(with: url, completionHandler: completion).resume()
}
Create a method to download the image (start the task)
func downloadImage(from url: URL) {
print("Download Started")
getData(from: url) { data, response, error in
guard let data = data, error == nil else { return }
print...
Converting from longitude\latitude to Cartesian coordinates
...
I have recently done something similar to this using the
"Haversine Formula" on WGS-84 data, which is a derivative of the "Law of Haversines" with very satisfying results.
Yes, WGS-84 assumes the Earth is an ellipsoid, but I believe you ...
How can I check for an empty/undefined/null string in JavaScript?
...
If you just want to check whether there's any value, you can do
if (strValue) {
//do something
}
If you need to check specifically for an empty string over null, I would think checking against "" is your best bet, using the === operator (so that you know that it is, in fact, a ...
What does mvn install in maven exactly do
I just started using Maven and I was told to do mvn install in a specific directory.
7 Answers
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Callback on CSS transition
... answered Jan 18 '10 at 16:51
Doug NeinerDoug Neiner
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...
How to do Mercurial's 'hg remove' for all missing files?
...
one word of warning... don't freak out when it dumps a whole bunch of crap to the screen... (like I did)
– Richard B
Oct 6 '13 at 11:12
...
The current branch is not configured for pull No value for key branch.master.merge found in configur
...ocal master branch is not set up to track remote master branch.
You could do git pull origin master to tell git the explicit branch you want to pull or you add this to your .git/config:
[branch "master"]
remote = origin
merge = refs/heads/master
When you push to master for the first time, ad...
node and Error: EMFILE, too many open files
...
For when graceful-fs doesn't work... or you just want to understand where the leak is coming from. Follow this process.
(e.g. graceful-fs isn't gonna fix your wagon if your issue is with sockets.)
From My Blog Article: http://www.blakerobertson....
GetHashCode Guidelines in C#
... is mostly, it is a valid guideline, but perhaps not a valid rule. It also doesn't tell the whole story.
The point being made is that for mutable types, you cannot base the hash code on the mutable data because two equal objects must return the same hash code and the hash code has to be valid for t...