Hi all, I'm looking at some Haskell code that has things like: var' <- function and also functions with names like: function' = ..... What does the tick mean?? Cheers, Erik -- ----------------------------------------------------------------- Erik de Castro Lopo ----------------------------------------------------------------- "Do I do everything in C++ and teach a course in advanced swearing?" -- David Beazley at IPC8, on choosing a language for teaching
On 2009 Jan 4, at 0:52, Erik de Castro Lopo wrote:
function' = .....
What does the tick mean??
By convention it signals a variant of the function without the tick. Semantically it doesn't mean anything special; you can use ' in an identifier as long as it's not the first character. -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH
Brandon S. Allbery KF8NH wrote:
By convention it signals a variant of the function without the tick. Semantically it doesn't mean anything special; you can use ' in an identifier as long as it's not the first character.
Thanks Brandon. Thats what I guessed but I couldn't find a good google search term to confirm that. Cheers, Erik -- ----------------------------------------------------------------- Erik de Castro Lopo ----------------------------------------------------------------- "If you already know what recursion is, just remember the answer. Otherwise, find someone who is standing closer to Douglas Hofstadter; then ask him or her what recursion is." -- http://www.cabochon.com/~stevey/blog-rants/godel-escher-blog.html
On Sun, Jan 4, 2009 at 6:55 AM, Brandon S. Allbery KF8NH
On 2009 Jan 4, at 0:52, Erik de Castro Lopo wrote:
function' = .....
What does the tick mean??
By convention it signals a variant of the function without the tick...
The tick is often used to signal a more strict variant of the function without the tick. See foldl and foldl' for example: http://haskell.org/ghc/docs/latest/html/libraries/base/Data-List.html#v:fold... regards, Bas
participants (3)
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Bas van Dijk -
Brandon S. Allbery KF8NH -
Erik de Castro Lopo