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How can I declare and use Boolean variables in a shell script?
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Revised Answer (Feb 12, 2014)
the_world_is_flat=true
# ...do something interesting...
if [ "$the_world_is_flat" = true ] ; then
echo 'Be careful not to fall off!'
fi
Original Answer
Caveats: https://stackoverflow.com/a/21210966/89391
the_wor...
Ruby: Easiest Way to Filter Hash Keys?
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edited Nov 29 '18 at 14:45
Jason Swett
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Cast List to List
...ou can convert a List<Apple> to an IEnumerable<IFruit> in .NET 4 / C# 4 due to covariance, but if you want a List<IFruit> you'd have to create a new list. For example:
// In .NET 4, using the covariance of IEnumerable<T>
List<IFruit> fruit = apples.ToList<IFruit>...
How to get root view controller?
...er = appDelegate.window!.rootViewController as! YourViewController
Swift 4 & 4.2
let viewController = UIApplication.shared.keyWindow!.rootViewController as! YourViewController
Swift 5 & 5.1 & 5.2
let viewController = UIApplication.shared.windows.first!.rootViewController as! YourVi...
Firebase Storage How to store and Retrieve images [closed]
...mend that you use this for storing images, instead of storing them as base64 encoded data in the JSON database.
You certainly can! Depending on how big your images are, you have a couple options:
1. For smaller images (under 10mb)
We have an example project that does that here: https://github.co...
In Functional Programming, what is a functor?
... opposed to the layers existing only in the mind of the programmer. In 1994 when this work was published, it was a big deal.
For a wild example of ML functors in action, you could see the paper ML Module Mania, which contains a publishable (i.e., scary) example of functors at work. For a brillian...
How to change progress bar's progress color in Android
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294
I'm sorry that it's not the answer, but what's driving the requirement setting it from code ?
An...
Set HTML5 doctype with XSLT
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147
I think this is currently only supported by writing the doctype out as text:
<?xml version=...
VBA - how to conditionally skip a for loop iteration
... BrianBrian
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4
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Simple example of threading in C++
...dited Jul 5 '18 at 6:20
user276648
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answered Jun 27 '12 at 15:31
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