Re: String Deletion
- To: mathgroup at smc.vnet.net
- Subject: [mg121507] Re: String Deletion
- From: "Oleksandr Rasputinov" <oleksandr_rasputinov at hmamail.com>
- Date: Sun, 18 Sep 2011 04:09:40 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <j51sst$pfv$1@smc.vnet.net>
On Sat, 17 Sep 2011 11:30:53 +0100, Don <donabc at comcast.net> wrote:
> Given a simple list of strings:
>
> list = List["Z:XBREG","Z:XBREH","Z:XBREI","Z:ZZ6P","Z:ZZ6Q","aye"]
>
> how does one delete all the strings with a colon (:) anywhere in the
> string?
>
> DeleteCases[list, ___:___] looks very logical and should work,
> but of course it doesn't .
>
> Also, there is a StringCases function which would seem
> to correspond with the Cases function. There is a
> DeleteCases function but no string counterpart, namely,
> DeleteString function. Any reason for this?
>
> Thanks in advance.
>
___:___ is not a particularly meaningful pattern. Its FullForm makes this
clear:
Optional[BlankNullSequence[],BlankNullSequence[]]
To achieve what you want, you could try something like the following:
In[1] :=
list = {"Z:XBREG", "Z:XBREH", "Z:XBREI", "Z:ZZ6P", "Z:ZZ6Q", "aye"};
In[2] :=
Select[list, StringFreeQ[#, ":"] &]
Out[2] =
{"aye"}