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Rails: What's a good way to validate links (URLs)?
... Rails. I was thinking of using a regular expression, but am not sure if this is the best practice.
21 Answers
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How do I check whether a file exists without exceptions?
How do I check if a file exists or not, without using the try statement?
39 Answers
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ActiveRecord OR query
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answered Sep 3 '10 at 22:08
Dan McNevinDan McNevin
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Adding elements to object
I need to populate a json file, now I have something like this:
17 Answers
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UIActivityViewController crashing on iOS 8 iPads
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On iPad the activity view controller will be displayed as a popover using the new UIPopoverPresentationController, it requires that you specify an anchor point for the presentation of the popover using one of the three following properties:
barButtonItem
sourceView
sou...
When should one use RxJava Observable and when simple Callback on Android?
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For simple networking stuff, the advantages of RxJava over Callback is very limited. The simple getUserPhoto example:
RxJava:
api.getUserPhoto(photoId)
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Action1<Photo>() {
@Override
public void ca...
Naming Classes - How to avoid calling everything a “Manager”? [closed]
...t contain no state and are generally procedural and static. An alternative is Coordinator.
You could get particularly purple prosey with the names and go for things like Minder, Overseer, Supervisor, Administrator, and Master, but as I said I prefer keeping it like the framework names you're used t...
Access is denied when attaching a database
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Run SQL Server Management Studio as an Administrator. (right click-> run as administrator) that took care of all the weirdness in my case.
SQL SRV EXPRESS 2008 R2. Windows 7
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Canary release strategy vs. Blue/Green
My understanding of a canary release is that it's a partial release to a subset of production nodes with sticky sessions turned on. That way you can control and minimize the number of users/customers that get impacted if you end up releasing a bad bug.
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How can I color Python logging output?
...ng module, which I eventually did after a couple of tries and errors.
Here is what I end up with:
BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)
#The background is set with 40 plus the number of the color, and the foreground with 30
#These are the sequences need to get colored o...