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[elm/en] Fixes #2584 (#2610)

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Roman Frołow 2016-12-27 13:06:36 +01:00 committed by ven
parent 9453efb845
commit e5ff868d15
1 changed files with 10 additions and 10 deletions
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@ -51,18 +51,18 @@ not False -- True
["the", "quick", "brown", "fox"] ["the", "quick", "brown", "fox"]
[1, 2, 3, 4, 5] [1, 2, 3, 4, 5]
-- The second example can also be written with two dots. -- The second example can also be written with two dots.
[1..5] List.range 1 5
-- Append lists just like strings. -- Append lists just like strings.
[1..5] ++ [6..10] == [1..10] -- True List.range 1 5 ++ List.range 6 10 == List.range 1 10 -- True
-- To add one item, use "cons". -- To add one item, use "cons".
0 :: [1..5] -- [0, 1, 2, 3, 4, 5] 0 :: List.range 1 5 -- [0, 1, 2, 3, 4, 5]
-- The head and tail of a list are returned as a Maybe. Instead of checking -- The head and tail of a list are returned as a Maybe. Instead of checking
-- every value to see if it's null, you deal with missing values explicitly. -- every value to see if it's null, you deal with missing values explicitly.
List.head [1..5] -- Just 1 List.head (List.range 1 5) -- Just 1
List.tail [1..5] -- Just [2, 3, 4, 5] List.tail (List.range 1 5) -- Just [2, 3, 4, 5]
List.head [] -- Nothing List.head [] -- Nothing
-- List.functionName means the function lives in the List module. -- List.functionName means the function lives in the List module.
@ -150,10 +150,10 @@ answer =
42 42
-- Pass functions as arguments to other functions. -- Pass functions as arguments to other functions.
List.map double [1..4] -- [2, 4, 6, 8] List.map double (List.range 1 4) -- [2, 4, 6, 8]
-- Or write an anonymous function. -- Or write an anonymous function.
List.map (\a -> a * 2) [1..4] -- [2, 4, 6, 8] List.map (\a -> a * 2) (List.range 1 4) -- [2, 4, 6, 8]
-- You can pattern match in function definitions when there's only one case. -- You can pattern match in function definitions when there's only one case.
-- This function takes one tuple rather than two arguments. -- This function takes one tuple rather than two arguments.
@ -180,7 +180,7 @@ fib n =
else else
fib (n - 1) + fib (n - 2) fib (n - 1) + fib (n - 2)
List.map fib [0..8] -- [1, 1, 2, 3, 5, 8, 13, 21, 34] List.map fib (List.range 0 8) -- [1, 1, 2, 3, 5, 8, 13, 21, 34]
-- Another recursive function (use List.length in real code). -- Another recursive function (use List.length in real code).
listLength aList = listLength aList =
@ -335,10 +335,10 @@ $ elm repl
-- Packages are identified by GitHub username and repo name. -- Packages are identified by GitHub username and repo name.
-- Install a new package, and record it in elm-package.json. -- Install a new package, and record it in elm-package.json.
$ elm package install evancz/elm-html $ elm package install elm-lang/html
-- See what changed between versions of a package. -- See what changed between versions of a package.
$ elm package diff evancz/elm-html 3.0.0 4.0.2 $ elm package diff elm-lang/html 1.1.0 2.0.0
-- Elm's package manager enforces semantic versioning, so minor version bumps -- Elm's package manager enforces semantic versioning, so minor version bumps
-- will never break your build! -- will never break your build!
``` ```