Mixing
String editing issues in FSharp F#
I'm quite new to the F# language and functional first approach, as I have only been working with Object Oriented languages.
Im trying to create a simple Word Guesser Console Application.
The feature i'm working on is to be able to guess for multiple characters at once
I have a hard time piecing together a nice way to do this, as i want to take a functional approach, and always end up having issues with immutable arrays and such.
Here is what I have come up with:
Im trying to replace/reveal the chars on the indexes of the given word, which corresponds the guess and return the resulting string
Any Leads?
Kindly Regards Kalrin
string replace build f#
asked Jan 2 at 20:25
KalrinKalrin
277
add a comment |
I'm quite new to the F# language and functional first approach, as I have only been working with Object Oriented languages.
Im trying to create a simple Word Guesser Console Application.
The feature i'm working on is to be able to guess for multiple characters at once
I have a hard time piecing together a nice way to do this, as i want to take a functional approach, and always end up having issues with immutable arrays and such.
Here is what I have come up with:
Im trying to replace/reveal the chars on the indexes of the given word, which corresponds the guess and return the resulting string
Any Leads?
Kindly Regards Kalrin
string replace build f#
asked Jan 2 at 20:25
KalrinKalrin
277
1
Why not build and return a newhiddenWordrather than trying to mutate the passed one? That would be my first step towards a more functional approach.
– ChiefTwoPencils
Jan 2 at 20:42
Thats what i'm thinking, but I really don't know how to approach that. I have tried googling a lot and watched a couple of f# tutorials, but cannot seem to wrap my head around this.
– Kalrin
Jan 2 at 20:51
If you don't find any help before, I'll write something up for you when I get off work.
– ChiefTwoPencils
Jan 2 at 20:53
Thanks! I would very much appreciate it. I will try to figure it out in the meantime too.
– Kalrin
Jan 2 at 21:01
OOP on .Net -> we use the method Substring from the string class instead of a loop. Moreover you code probably raise an exception at run time if hiddenword is shorter than startIndex ..... fsharpforfunandprofit.com/learning-fsharp and you should read all of this to get a good idea how F#/FP works fsharpforfunandprofit.com/series/thinking-functionally.html
– Jeff_hk
Jan 3 at 11:05
add a comment |
I'm quite new to the F# language and functional first approach, as I have only been working with Object Oriented languages.
Im trying to create a simple Word Guesser Console Application.
The feature i'm working on is to be able to guess for multiple characters at once
I have a hard time piecing together a nice way to do this, as i want to take a functional approach, and always end up having issues with immutable arrays and such.
Here is what I have come up with:
Im trying to replace/reveal the chars on the indexes of the given word, which corresponds the guess and return the resulting string
Any Leads?
Kindly Regards Kalrin
string replace build f#
asked Jan 2 at 20:25
KalrinKalrin
277
I'm quite new to the F# language and functional first approach, as I have only been working with Object Oriented languages.
Im trying to create a simple Word Guesser Console Application.
The feature i'm working on is to be able to guess for multiple characters at once
I have a hard time piecing together a nice way to do this, as i want to take a functional approach, and always end up having issues with immutable arrays and such.
Here is what I have come up with:
Im trying to replace/reveal the chars on the indexes of the given word, which corresponds the guess and return the resulting string
Any Leads?
Kindly Regards Kalrin
string replace build f#
string replace build f#
asked Jan 2 at 20:25
KalrinKalrin
277
asked Jan 2 at 20:25
KalrinKalrin
277
asked Jan 2 at 20:25
KalrinKalrin
277
asked Jan 2 at 20:25
KalrinKalrin
277
asked Jan 2 at 20:25
KalrinKalrin
277
277
1
Why not build and return a newhiddenWordrather than trying to mutate the passed one? That would be my first step towards a more functional approach.
– ChiefTwoPencils
Jan 2 at 20:42
Thats what i'm thinking, but I really don't know how to approach that. I have tried googling a lot and watched a couple of f# tutorials, but cannot seem to wrap my head around this.
– Kalrin
Jan 2 at 20:51
If you don't find any help before, I'll write something up for you when I get off work.
– ChiefTwoPencils
Jan 2 at 20:53
Thanks! I would very much appreciate it. I will try to figure it out in the meantime too.
– Kalrin
Jan 2 at 21:01
OOP on .Net -> we use the method Substring from the string class instead of a loop. Moreover you code probably raise an exception at run time if hiddenword is shorter than startIndex ..... fsharpforfunandprofit.com/learning-fsharp and you should read all of this to get a good idea how F#/FP works fsharpforfunandprofit.com/series/thinking-functionally.html
– Jeff_hk
Jan 3 at 11:05
add a comment |
1
Why not build and return a newhiddenWordrather than trying to mutate the passed one? That would be my first step towards a more functional approach.
– ChiefTwoPencils
Jan 2 at 20:42
Thats what i'm thinking, but I really don't know how to approach that. I have tried googling a lot and watched a couple of f# tutorials, but cannot seem to wrap my head around this.
– Kalrin
Jan 2 at 20:51
If you don't find any help before, I'll write something up for you when I get off work.
– ChiefTwoPencils
Jan 2 at 20:53
Thanks! I would very much appreciate it. I will try to figure it out in the meantime too.
– Kalrin
Jan 2 at 21:01
OOP on .Net -> we use the method Substring from the string class instead of a loop. Moreover you code probably raise an exception at run time if hiddenword is shorter than startIndex ..... fsharpforfunandprofit.com/learning-fsharp and you should read all of this to get a good idea how F#/FP works fsharpforfunandprofit.com/series/thinking-functionally.html
– Jeff_hk
Jan 3 at 11:05
1
1
Why not build and return a new
hiddenWord rather than trying to mutate the passed one? That would be my first step towards a more functional approach.– ChiefTwoPencils
Jan 2 at 20:42
Why not build and return a new
hiddenWord rather than trying to mutate the passed one? That would be my first step towards a more functional approach.– ChiefTwoPencils
Jan 2 at 20:42
Thats what i'm thinking, but I really don't know how to approach that. I have tried googling a lot and watched a couple of f# tutorials, but cannot seem to wrap my head around this.
– Kalrin
Jan 2 at 20:51
Thats what i'm thinking, but I really don't know how to approach that. I have tried googling a lot and watched a couple of f# tutorials, but cannot seem to wrap my head around this.
– Kalrin
Jan 2 at 20:51
If you don't find any help before, I'll write something up for you when I get off work.
– ChiefTwoPencils
Jan 2 at 20:53
If you don't find any help before, I'll write something up for you when I get off work.
– ChiefTwoPencils
Jan 2 at 20:53
Thanks! I would very much appreciate it. I will try to figure it out in the meantime too.
– Kalrin
Jan 2 at 21:01
Thanks! I would very much appreciate it. I will try to figure it out in the meantime too.
– Kalrin
Jan 2 at 21:01
OOP on .Net -> we use the method Substring from the string class instead of a loop. Moreover you code probably raise an exception at run time if hiddenword is shorter than startIndex ..... fsharpforfunandprofit.com/learning-fsharp and you should read all of this to get a good idea how F#/FP works fsharpforfunandprofit.com/series/thinking-functionally.html
– Jeff_hk
Jan 3 at 11:05
OOP on .Net -> we use the method Substring from the string class instead of a loop. Moreover you code probably raise an exception at run time if hiddenword is shorter than startIndex ..... fsharpforfunandprofit.com/learning-fsharp and you should read all of this to get a good idea how F#/FP works fsharpforfunandprofit.com/series/thinking-functionally.html
– Jeff_hk
Jan 3 at 11:05
add a comment |
1 Answer
1
active
oldest
votes
A functional way easy to get would be to use a match but to regenerate a new string.
You may also want to use a Some/None (which will give you an option string as a result of your function if you look at its signature, this is a functional way to write it but if you need an empty chain, you can also return one). Please refer to the bible for F# fsharpforfunandprofit.com
A few comments:
- OOP in .Net (let's say C#) : You would use Substring method instead of your for loop
- Be careful, Substirng can return an exception (if you put your mouse on it, it tells you so in the messagebox) and to avoid any issue at run time (as we usually do not work with exceptions in F# - cf Railway programming on fsharpforfunandprofit), you need a second match to check the length.
https://fsharpforfunandprofit.com/posts/the-option-type/
let stringContains (word:string) (hidden:string) (guess:string) =
match word.IndexOf(guess) with
| -1 -> None
| ind -> match (hidden.Length < ind) with
| true -> Some (guess)
| false -> Some (hidden.Substring(0, ind) + guess)
answered Jan 3 at 10:53
Jeff_hkJeff_hk
222210
@Kalrin - Is it what you epxected?
– Jeff_hk
Jan 8 at 1:25
add a comment |
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A functional way easy to get would be to use a match but to regenerate a new string.
You may also want to use a Some/None (which will give you an option string as a result of your function if you look at its signature, this is a functional way to write it but if you need an empty chain, you can also return one). Please refer to the bible for F# fsharpforfunandprofit.com
A few comments:
- OOP in .Net (let's say C#) : You would use Substring method instead of your for loop
- Be careful, Substirng can return an exception (if you put your mouse on it, it tells you so in the messagebox) and to avoid any issue at run time (as we usually do not work with exceptions in F# - cf Railway programming on fsharpforfunandprofit), you need a second match to check the length.
https://fsharpforfunandprofit.com/posts/the-option-type/
let stringContains (word:string) (hidden:string) (guess:string) =
match word.IndexOf(guess) with
| -1 -> None
| ind -> match (hidden.Length < ind) with
| true -> Some (guess)
| false -> Some (hidden.Substring(0, ind) + guess)
answered Jan 3 at 10:53
Jeff_hkJeff_hk
222210
@Kalrin - Is it what you epxected?
– Jeff_hk
Jan 8 at 1:25
add a comment |
A functional way easy to get would be to use a match but to regenerate a new string.
You may also want to use a Some/None (which will give you an option string as a result of your function if you look at its signature, this is a functional way to write it but if you need an empty chain, you can also return one). Please refer to the bible for F# fsharpforfunandprofit.com
A few comments:
- OOP in .Net (let's say C#) : You would use Substring method instead of your for loop
- Be careful, Substirng can return an exception (if you put your mouse on it, it tells you so in the messagebox) and to avoid any issue at run time (as we usually do not work with exceptions in F# - cf Railway programming on fsharpforfunandprofit), you need a second match to check the length.
https://fsharpforfunandprofit.com/posts/the-option-type/
let stringContains (word:string) (hidden:string) (guess:string) =
match word.IndexOf(guess) with
| -1 -> None
| ind -> match (hidden.Length < ind) with
| true -> Some (guess)
| false -> Some (hidden.Substring(0, ind) + guess)
answered Jan 3 at 10:53
Jeff_hkJeff_hk
222210
@Kalrin - Is it what you epxected?
– Jeff_hk
Jan 8 at 1:25
add a comment |
A functional way easy to get would be to use a match but to regenerate a new string.
You may also want to use a Some/None (which will give you an option string as a result of your function if you look at its signature, this is a functional way to write it but if you need an empty chain, you can also return one). Please refer to the bible for F# fsharpforfunandprofit.com
A few comments:
- OOP in .Net (let's say C#) : You would use Substring method instead of your for loop
- Be careful, Substirng can return an exception (if you put your mouse on it, it tells you so in the messagebox) and to avoid any issue at run time (as we usually do not work with exceptions in F# - cf Railway programming on fsharpforfunandprofit), you need a second match to check the length.
https://fsharpforfunandprofit.com/posts/the-option-type/
let stringContains (word:string) (hidden:string) (guess:string) =
match word.IndexOf(guess) with
| -1 -> None
| ind -> match (hidden.Length < ind) with
| true -> Some (guess)
| false -> Some (hidden.Substring(0, ind) + guess)
answered Jan 3 at 10:53
Jeff_hkJeff_hk
222210
A functional way easy to get would be to use a match but to regenerate a new string.
You may also want to use a Some/None (which will give you an option string as a result of your function if you look at its signature, this is a functional way to write it but if you need an empty chain, you can also return one). Please refer to the bible for F# fsharpforfunandprofit.com
A few comments:
- OOP in .Net (let's say C#) : You would use Substring method instead of your for loop
- Be careful, Substirng can return an exception (if you put your mouse on it, it tells you so in the messagebox) and to avoid any issue at run time (as we usually do not work with exceptions in F# - cf Railway programming on fsharpforfunandprofit), you need a second match to check the length.
https://fsharpforfunandprofit.com/posts/the-option-type/
let stringContains (word:string) (hidden:string) (guess:string) =
match word.IndexOf(guess) with
| -1 -> None
| ind -> match (hidden.Length < ind) with
| true -> Some (guess)
| false -> Some (hidden.Substring(0, ind) + guess)
answered Jan 3 at 10:53
Jeff_hkJeff_hk
222210
edited Jan 4 at 2:21
answered Jan 3 at 10:53
Jeff_hkJeff_hk
222210
answered Jan 3 at 10:53
Jeff_hkJeff_hk
222210
answered Jan 3 at 10:53
Jeff_hkJeff_hk
222210
222210
@Kalrin - Is it what you epxected?
– Jeff_hk
Jan 8 at 1:25
add a comment |
@Kalrin - Is it what you epxected?
– Jeff_hk
Jan 8 at 1:25
@Kalrin - Is it what you epxected?
– Jeff_hk
Jan 8 at 1:25
@Kalrin - Is it what you epxected?
– Jeff_hk
Jan 8 at 1:25
add a comment |
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1
Why not build and return a new
hiddenWordrather than trying to mutate the passed one? That would be my first step towards a more functional approach.– ChiefTwoPencils
Jan 2 at 20:42
Thats what i'm thinking, but I really don't know how to approach that. I have tried googling a lot and watched a couple of f# tutorials, but cannot seem to wrap my head around this.
– Kalrin
Jan 2 at 20:51
If you don't find any help before, I'll write something up for you when I get off work.
– ChiefTwoPencils
Jan 2 at 20:53
Thanks! I would very much appreciate it. I will try to figure it out in the meantime too.
– Kalrin
Jan 2 at 21:01
OOP on .Net -> we use the method Substring from the string class instead of a loop. Moreover you code probably raise an exception at run time if hiddenword is shorter than startIndex ..... fsharpforfunandprofit.com/learning-fsharp and you should read all of this to get a good idea how F#/FP works fsharpforfunandprofit.com/series/thinking-functionally.html
– Jeff_hk
Jan 3 at 11:05