Matching and deleting items in list of tuples

Posted by Sappe on Stack Overflow See other posts from Stack Overflow or by Sappe
Published on 2010-04-06T22:16:55Z Indexed on 2010/04/06 22:53 UTC
Read the original article Hit count: 148

Filed under:

erlang

|

lists

|

delete

|

pattern-matching

I have a list of tuples, say [{x, a, y}, {x, b, y}].

Is there a built-in function (or can I use a combination of BIFs) to delete all tuples matching {x, _, y}, as in match and delete based on the first and third term in the tuples, ignoring the second?

© Stack Overflow or respective owner

Related posts about erlang

Starting an Erlang slave node in escript fails when using custom Erlang in Ubuntu 10.4

as seen on Stack Overflow - Search for 'Stack Overflow'
I have the following escript: #!/usr/bin/env escript %%! -name [email protected] main(_) -> NodeName = test, Host = '127.0.0.1', Args = "", {ok, _Node} = slave:start_link(Host, NodeName, Args), io:format("Node started successfully!"). When running it on Ubuntu 10.04… >>> More
How to setup Erlang + Emacs with erlang.el?

as seen on Stack Overflow - Search for 'Stack Overflow'
I have downloaded and installed Erlang and EmacsW32. But how do I use erlang.el in Emacs? Where do I place it or install it? I have read Erlang/OTP R13B04 documentation and Erlang mode for Emacs documentation but I haven't found any information about how to set up it. >>> More
How do I install LFE on Ubuntu Karmic?

as seen on Stack Overflow - Search for 'Stack Overflow'
Erlang was already installed: $dpkg -l|grep erlang ii erlang 1:13.b.3-dfsg-2ubuntu2 Concurrent, real-time, distributed function ii erlang-appmon 1:13.b.3-dfsg-2ubuntu2 Erlang/OTP application monitor ii erlang-asn1 … >>> More
How to switch between the upper and lower pane in emacs?

as seen on Super User - Search for 'Super User'
I am using the erlang mode in Aquamacs. The mode, by default, creates a new pane and buffer "*erlang*" when I hit C-C C-K to compile an erlang file. (as seen in the attached screen shot) What is the easiest way to switch between these two panes? I do not think "C-x b" is applicable in this case… >>> More
Erlang: Mnesia or Mysql ?

as seen on Stack Overflow - Search for 'Stack Overflow'
What DMBS do you use with Erlang ? and Why ? >>> More

Related posts about lists

Global Address List, Multiple All Address Lists in CN=Address Lists Container

as seen on Server Fault - Search for 'Server Fault'
When my colleges (that was way before my time here) updated Exchange 2000 to 2003 a English All Address Lists appeared in addition to the German variant. The English All Address Lists have German titled GAL below it. This has just been a cosmetic problem for the last few years. Now as we are in the… >>> More
Lists inside lists don't validate with w3c?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi everybody, I've got some lists inside lists to make some fancy drop-down menus. e.g <ul> <li>something <ul> <li>sub menu</li> </ul> </li> </ul> Problem is, w3c doesn't like it. Is there a way to make this validate… >>> More
Why are listener lists Lists?

as seen on Stack Overflow - Search for 'Stack Overflow'
Why are listener lists (e.g. in Java those that use addXxxListener() and removeXxxListener() to register and unregister listeners) called lists, and usually implemented as Lists? Wouldn't a Set be a better fit, since in the case of listeners there's No matter in which order they get called (although… >>> More
Updating Lists of Lists in Tapestry4 using textfields and a single submit button

as seen on Stack Overflow - Search for 'Stack Overflow'
In Tapestry 4 I am trying it iterate over a list of lists (technically a list of objects who have a list of strings as a data field). I am currently doing this by using 'nested' for components. (This is pseudo code) <span jwcid="Form"> <span jwcid="@For" source="ognl:Javaclass.TopLevelList"… >>> More
jQuery.each for lists and non-lists

as seen on Stack Overflow - Search for 'Stack Overflow'
I've a jQuery.each(data, foo), where data is either a string or a list of strings. I'd like to know if there's an existing utility function to convert the string to a list, or otherwise perform foo on just the string. So instead of the easy route: if (!$.isArray(data)) { foo(0, data); // can't… >>> More