Snippets tagged Option
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Nullable to Option
it's allways a pain to work with F#'s Option values outside of F# - there you've got the Nullable-class this is a short snippet to convert Nullable<'a> to 'a option
2 people like this
Like the snippet!Posted: 15 years ago by Carsten König
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Option.concat
Everyone else has a concat, so why not Option.
2 people like this
Like the snippet!Posted: 12 years ago by Simon Cousins
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Why printing None prints
When printing None via printfn (or any of the other print functions for that matter), the result is
4 people like this. This example shows why.
Like the snippet!Posted: 12 years ago by Dave Fancher
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Simple example how to use option type
For tutorial, example how to use option type.
3 people like this
Like the snippet!Posted: 12 years ago by Tuomas Hietanen
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Working from options
Adding together Option types
5 people like this
Like the snippet!Posted: 11 years ago by mavnn
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Optional TryParse
Wrap TryParse in an option.
5 people like this
Like the snippet!Posted: 10 years ago by Craig Boucher
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Active pattern to define default values
This active pattern allows you to specify default values for option arguments in the signature of your function, so you can remove unnecessary calls to defaultArg. It also save you having to define a new name for the defaulted value.
22 people like this
Like the snippet!Posted: 15 years ago by Kurt Schelfthout
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Option.either
I think the following function is useful allowing you to do an Option.map + defaultArg in one go (plus defaultArg argument order is a little annoying). Might need a better name.
3 people like this
Like the snippet!Posted: 12 years ago by David Grenier
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Initialization of 2D array that may fail
A function to initialize 2D array that supports failures - if the initializer fails to produce value for any of the array locations, the construction is stopped and the function returns 'None'
3 people like this
Like the snippet!Posted: 12 years ago by Tomas Petricek
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Safely unbox to an option
An extra primitive that can be used to safely unbox to Some
8 people like this. Useful for use with options where only a single type match is needed and a function is only applied if successful.
Like the snippet!Posted: 11 years ago by 7sharp9
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Option.getOrDefault
Safe get for the Option type
0 people like this
Like the snippet!Posted: 10 years ago by let rec
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Helpful Tools for Mixing C# and F#
Extension methods which greatly simplify using Option<'t> from C# code.
5 people like this
Like the snippet!Posted: 9 years ago by Paulmichael Blasucci