diff options
Diffstat (limited to 'fsharp.html.markdown')
| -rw-r--r-- | fsharp.html.markdown | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/fsharp.html.markdown b/fsharp.html.markdown index bbf477ba..064a9fdd 100644 --- a/fsharp.html.markdown +++ b/fsharp.html.markdown @@ -14,7 +14,7 @@ The syntax of F# is different from C-style languages: * Curly braces are not used to delimit blocks of code. Instead, indentation is used (like Python). * Whitespace is used to separate parameters rather than commas. -If you want to try out the code below, you can go to [tryfsharp.org](http://www.tryfsharp.org/Create) and paste it into an interactive REPL. +If you want to try out the code below, you can go to [https://try.fsharp.org](https://try.fsharp.org) and paste it into an interactive REPL. ```csharp @@ -34,7 +34,7 @@ let myFloat = 3.14 let myString = "hello" // note that no types needed // ------ Lists ------ -let twoToFive = [2; 3; 4; 5] // Square brackets create a list with +let twoToFive = [2; 3; 4; 5] // Square brackets create a list with // semicolon delimiters. let oneToFive = 1 :: twoToFive // :: creates list with new 1st element // The result is [1; 2; 3; 4; 5] @@ -53,7 +53,8 @@ add 2 3 // Now run the function. // to define a multiline function, just use indents. No semicolons needed. let evens list = - let isEven x = x % 2 = 0 // Define "isEven" as a sub function + let isEven x = x % 2 = 0 // Define "isEven" as a sub function. Note + // that equality operator is single char "=". List.filter isEven list // List.filter is a library function // with two parameters: a boolean function // and a list to work on @@ -193,7 +194,7 @@ module ListExamples = | [] -> printfn "the list is empty" | [first] -> printfn "the list has one element %A " first | [first; second] -> printfn "list is %A and %A" first second - | _ -> printfn "the list has more than two elements" + | first :: _ -> printfn "the list has more than two elements, first element %A" first listMatcher [1; 2; 3; 4] listMatcher [1; 2] @@ -306,7 +307,7 @@ module DataTypeExamples = // ------------------------------------ // Union types (aka variants) have a set of choices - // Only case can be valid at a time. + // Only one case can be valid at a time. // ------------------------------------ // Use "type" with bar/pipe to define a union type |