| Re: Concatenate elements of string array [message #16643 is a reply to message #16635] |
Tue, 10 August 1999 00:00   |
kluegel
Messages: 11
Registered: February 1999
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Junior Member |
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In article <7oo5ds$c9c@post.gsfc.nasa.gov>,
fireman@mcst.gsfc.nasa.gov (Gwyn Fireman) wrote:
> IDL> string_array=['one ','string ','split ','into ','many ','array
elements']
> IDL> help,string_array & print,string_array
> STRING_ARRAY STRING = Array[6]
> one string split into many array elements
> IDL> byte_array=byte(string_array)
> IDL> byte_array=reform(byte_array,n_elements(byte_array))
> IDL> byte_array=byte_array[where(byte_array ne 0)]
> IDL> one_string=string(byte_array)
> IDL> help,one_string & print,one_string
> ONE_STRING STRING = 'one string split into many array
elements'
> one string split into many array elements
Clever. Reminiscent of APL.
Playing with your approach, I see the BYTE(string_array) produces a 2D
array where one dimension is the number of characters in the longest
string of the original 1D array. So a nasty case would be an array of
strings where one string was very long and all the others were short.
This would make the intermediate 2D array very big.
Another limitation is that we must make a rule that no strings may
contain any nul characters.
Something tells me this is all the better that can be done with
array-based approaches. But just in case... Any other ideas out there?
-- Tom Kluegel
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