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Understanding generators in Python
...generators.
Instead of creating a function which returns a list of values, one can write a generator which generates the values on the fly. This means that no list needs to be constructed, meaning that the resulting code is more memory efficient. In this way one can even describe data streams which ...
What's the difference between the Dependency Injection and Service Locator patterns?
...iven its dependencies. It neither knows, nor cares where they come from. One important result of this is that the DI example is much easier to unit test -- because you can pass it mock implementations of its dependent objects. You could combine the two -- and inject the service locator (or a fact...
How can I remove the extension of a filename in a shell script?
... The problem with this answer is it assumes input string has ONLY one dot ... @chepner below has a much better solution ... name=${filename%.*}
– Scott Stensland
Apr 30 '16 at 12:24
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How to record webcam and audio using webRTC and a server-based Peer connection
...ial, showing the different capabilities of the recording endpoint.
kurento-one2one-recording: How to record a one-to-one communication in the media server.
kurento-hello-world-repository: use an external repository to record the file.
Disclaimer: I'm part of the team that develops Kurento.
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How should I choose an authentication library for CodeIgniter? [closed]
I see there are a few . Which ones are maintained and easy to use? What are their pros and cons?
11 Answers
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convert a list of objects from one type to another using lambda expression
I have a foreach loop reading a list of objects of one type and producing a list of objects of a different type. I was told that a lambda expression can achieve the same result.
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How to sort List of objects by some property
...t to sort in a particular order, but might equally easily want a different one) it's better to implement Comparator<T>. This particular situation could go either way, to be honest... but I'd probably stick with the more flexible Comparator<T> option.
EDIT: Sample implementation:
publi...
How to use Namespaces in Swift?
...nce is that Swift therefore is not namespaced in the slightest. In turning one of my apps from Objective-C to Swift, I created an embedded framework because it was so easy and cool to do. Importing the framework, however, imports all the Swift stuff in the framework - so presto, once again there is ...
What is TypeScript and why would I use it in place of JavaScript? [closed]
...t which primarily provides optional static typing, classes and interfaces. One of the big benefits is to enable IDEs to provide a richer environment for spotting common errors as you type the code.
To get an idea of what I mean, watch Microsoft's introductory video on the language.
For a large Jav...
Rename all files in directory from $filename_h to $filename_half?
...commands.
for file in *_h.png
do
mv "$file" "${file/_h.png/_half.png}"
done
Do not add #!/bin/sh
For those that need that one-liner:
for file in *.png; do mv "$file" "${file/_h.png/_half.png}"; done
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