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Re: splitting strings [message #42425]

Sat, 05 February 2005 07:21

KM
Messages: 29
Registered: October 2004

Junior Member

On Fri, 4 Feb 2005, Benjamin Hornberger wrote:
> Benjamin Hornberger wrote:
>> Hi all,
>>
>> I would like to split a string by whitespace characters, while
>> anything between quotes should be recognized as one elements
>> (even if it contains whitespace). Let's say I have the string
>>
>> 'cat dog "ground hog" bird'
>>
>> I want to split it into ['cat', 'dog', 'ground hog', 'bird'].
>
> Ok, here we go. Found on http://php.net/split and translated to
> IDL with some modifications. Any comments are welcome.

Looks like it works. It is loopy, but I doubt you need much speed,
unless you have a lot of strings. That being said, I got this
working before you posted that with your 2nd example. The 2nd
example breaks the code, but works with some minor modifications.
The following is not very robust.

str = 'cat dog "ground hog" "bird"'
str2 = strsplit(str,/extract) ; split on whitespace
split = STREGEX(str2,'"') ; find all "'s
split_loc = where( split gt 0, n )-1 ; use only the 2st half
str3 = str2
str3[ split_loc ] = str3[split_loc]+" "+str3[split_loc+1] ; patch
str3[ split_loc+1 ] = "rem" ; remove the 2nd half of the bad split
str3 = str3[ where( str3 NE 'rem' ) ]

Also, unrelated to the above:
IDL> print, stregex(str,'".*( ).*',/subexpr)
prints both the location of the " and the space.

So I'm pretty sure there is a way to do this without loops...

-k.

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[Message index]

		Re: splitting strings By: KM on Sat, 05 February 2005 07:21
		Re: splitting strings By: Benjamin Hornberger on Fri, 04 February 2005 12:06
		Re: splitting strings By: David Fanning on Thu, 03 February 2005 13:04
		Re: splitting strings By: Benjamin Hornberger on Thu, 03 February 2005 12:53
		Re: splitting strings By: David Fanning on Thu, 03 February 2005 12:48

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