rexcfnghk

List.iteri (addOne >> printfn "Current index: %i Current element: %A") ['a'..'e']

rexcfnghk

List.iteri ((+) 1 >> printfn "Current index: %i Current element: %A") ['a'..'e']

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type ValidationResult<'a> =
    | Success of 'a
    | Error of string

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open FsCheck
open FsCheck.Xunit
open Swensen.Unquote

[<Property>]
let ``tryConvertToChar converts successfully for one-character string`` () =
    let validStringArb =
        Arb.generate<char>
        |> Gen.map string
        |> Arb.fromGen

rexcfnghk

// val tryConvertToChar: s: string -> ValidationResult<char>
let tryConvertToChar (s: string) =
    Success 'a'

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open System

// val tryConvertToChar: s: string -> ValidationResult<char>
let tryConvertToChar (s: string) =
    match Char.TryParse s with
    | true, c -> Success c
    | false, _ -> Error "Input string is not a character"

rexcfnghk

[<Property>]
let ``tryConvertToChar returns the same char from the one-character string`` () =
    let validStringArb = 
        Arb.generate<char>
        |> Gen.map string
        |> Arb.fromGen

    Prop.forAll validStringArb <| fun s -> 
        let cV = tryConvertToChar s
        test <@ match cV with Success c -> sprintf "%c" c = s | Error _ -> false @>

rexcfnghk

[<Property>]
let ``tryConvertToChar returns error for strings with length > 2 `` () =
    let stringLengthLargerThan2Arb =
        Arb.generate<string>
        |> Gen.suchThat (fun s -> String.length s >= 2)
        |> Arb.fromGen

    Prop.forAll stringLengthLargerThan2Arb <| fun s ->
        test <@ match tryConvertToChar s with Success _ -> false | Error _ -> true @>

rexcfnghk

const http = require('http');

var i = 0,
    urls = [ 'http://www.google.com', 'http://www.yahoo.com' ],
    urlLength = urls.length;

for (; i < urlLength; i++) {
    http.get(urls[i], function() { console.log('i: ' + i); });
}

rexcfnghk

const http = require('http');

var i = 0,
    urls = [ 'http://www.google.com', 'http://www.yahoo.com' ],
    urlLength = urls.length;

for (; i < urlLength; i++) {
    var innerI = i;
    http.get(urls[i], function() { console.log('i: ' + innerI); });
}