Difference between revisions of "Cookbook"
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| + | == Haskell Cookbook == |
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| − | '''We need to start a GOOD (aka, not a PLEAC clone) Haskell cookbook.''' |
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| + | * [[Cookbook/Compilers and interpreters|Haskell compilers and interpreters]] |
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| + | * [[Cookbook/Numbers|Numbers]] |
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| + | * [[Cookbook/Lists and strings|Lists and strings]] |
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| + | * [[Cookbook/Other data structures|Other data structures]] |
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| + | * [[Cookbook/Dates And Time|Dates and time]] |
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| + | * [[Cookbook/Pattern matching|Pattern matching]] |
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| + | * [[Cookbook/Interactivity|Interactivity]] |
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| + | * [[Cookbook/Files|Files]] |
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| + | * [[Cookbook/Network programming|Network programming]] |
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| + | * [[Cookbook/XML|XML]] |
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| + | * [[Cookbook/Databases access|Databases access]] |
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| + | * [[Cookbook/Graphical user interfaces|Graphical user interfaces]] |
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| + | * [[Cookbook/PDF files|PDF files]] |
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| + | * [[Cookbook/FFI|FFI]] |
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| + | * [[Cookbook/Testing|Testing]] |
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| + | == Similar projects for other programming languages == |
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| − | == GHCi/Hugs == |
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| + | * [http://cl-cookbook.sourceforge.net/ Common Lisp Cookbook] |
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| − | === GHCi Interaction === |
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| + | * [http://pleac.sourceforge.net/ PLEAC] |
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| − | To start GHCi from a command prompt, simply type `ghci' |
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| + | * [http://www.zenspider.com/Languages/Ruby/Cookbook/index.html Ruby Cookbook] |
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| − | |||
| + | * [http://schemecookbook.org/Cookbook/WebHome Scheme Cookbook] |
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| − | $ ghci |
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| + | * [http://fssnip.net/ F# Snippets] |
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| − | ___ ___ _ |
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| + | [[Category:FAQ]] |
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| − | / _ \ /\ /\/ __(_) |
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| + | [[Category:How to]] |
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| − | / /_\// /_/ / / | | GHC Interactive, version 6.6, for Haskell 98. |
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| − | / /_\\/ __ / /___| | http://www.haskell.org/ghc/ |
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| − | \____/\/ /_/\____/|_| Type :? for help. |
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| − | |||
| − | Loading package base ... linking ... done. |
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| − | Prelude> |
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| − | |||
| − | [http://haskell.org/ghc/docs/latest/html/libraries/base/Prelude.html Prelude] is the "base" library of Haskell. |
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| − | |||
| − | To create variables at the GHCi prompt, use `let' |
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| − | <haskell> |
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| − | Prelude> let x = 5 |
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| − | Prelude> x |
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| − | 5 |
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| − | Prelude> let y = 3 |
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| − | Prelude> y |
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| − | 3 |
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| − | Prelude> x + y |
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| − | 8 |
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| − | </haskell> |
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| − | |||
| − | To check the type of an expression or function, use the command `:t' |
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| − | <haskell> |
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| − | Prelude> :t x |
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| − | x :: Integer |
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| − | </haskell> |
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| − | |||
| − | == Strings == |
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| − | === Output === |
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| − | Strings can be output in a number of different ways. |
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| − | |||
| − | <haskell> |
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| − | Prelude> putStr "Foo" |
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| − | FooPrelude> |
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| − | </haskell> |
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| − | As you can see, [http://haskell.org/ghc/docs/latest/html/libraries/base/Prelude.html#v%3AputStr putStr] does not include the newline character `\n'. We can either use putStr like this: |
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| − | <haskell> |
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| − | Prelude> putStr "Foo\n" |
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| − | Foo |
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| − | </haskell> |
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| − | Or use [http://haskell.org/ghc/docs/latest/html/libraries/base/Prelude.html#v%3AputStrLn putStrLn], which is already in the Standard Prelude |
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| − | <haskell> |
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| − | Prelude> putStrLn "Foo" |
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| − | Foo |
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| − | </haskell> |
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| − | |||
| − | === Concatenation === |
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| − | Concatenation of strings is done with the `++' operator. |
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| − | <haskell> |
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| − | Prelude> "foo" ++ "bar" |
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| − | "foobar" |
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| − | </haskell> |
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| − | == Numbers == |
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| − | |||
| − | |||
| − | == Dates and Time == |
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| − | Use `System.Time.getClockTime' to get a properly formatted date stamp. |
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| − | |||
| − | <haskell> |
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| − | Prelude> System.Time.getClockTime |
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| − | Wed Feb 21 20:05:35 CST 2007 |
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| − | </haskell> |
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| − | |||
| − | == Lists == |
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| − | Haskell has all of the general list manipulation functions. |
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| − | |||
| − | <haskell> |
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| − | Prelude> head [1,2,3] |
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| − | 1 |
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| − | |||
| − | Prelude> tail [1,2,3] |
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| − | [2,3] |
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| − | |||
| − | Prelude> length [1,2,3] |
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| − | 3 |
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| − | </haskell> |
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| − | |||
| − | == Pattern Matching == |
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| − | Haskell does implicit pattern matching. |
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| − | |||
| − | == Arrays == |
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| − | |||
| − | |||
| − | == Files == |
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| − | |||
| − | |||
| − | == Network Programming == |
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| − | |||
| − | |||
| − | == XML == |
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| − | |||
| − | |||
| − | == Databases == |
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| − | |||
| − | |||
| − | == FFI == |
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Latest revision as of 18:49, 26 May 2011
Haskell Cookbook
- Haskell compilers and interpreters
- Numbers
- Lists and strings
- Other data structures
- Dates and time
- Pattern matching
- Interactivity
- Files
- Network programming
- XML
- Databases access
- Graphical user interfaces
- PDF files
- FFI
- Testing