List/String Conversion - Guile Reference Manual

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5.5.5.4 List/String conversion

When processing strings, it is often convenient to first convert them into a list representation by using the procedure string->list, work with the resulting list, and then convert it back into a string. These procedures are useful for similar tasks.

— Scheme Procedure: string->list str [start [end]]
— C Function: scm_substring_to_list (str, start, end)
— C Function: scm_string_to_list (str)

Convert the string str into a list of characters.

— Scheme Procedure: string-split str chr
— C Function: scm_string_split (str, chr)

Split the string str into the a list of the substrings delimited by appearances of the character chr. Note that an empty substring between separator characters will result in an empty string in the result list.
          (string-split "root:x:0:0:root:/root:/bin/bash" #\:)
          =>
          ("root" "x" "0" "0" "root" "/root" "/bin/bash")
          
          (string-split "::" #\:)
          =>
          ("" "" "")
          
          (string-split "" #\:)
          =>
          ("")
     