(guile.info.gz) SRFI-13 Prefixes/Suffixes

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 39.11.8 Prefixes/Suffixes
 -------------------------
 
 Using these procedures you can determine whether a given string is a
 prefix or suffix of another string or how long a common prefix/suffix
 is.
 
  -- Scheme Procedure: string-prefix-length s1 s2 [start1 end1 start2
           end2]
  -- Scheme Procedure: string-prefix-length-ci s1 s2 [start1 end1 start2
           end2]
  -- Scheme Procedure: string-suffix-length s1 s2 [start1 end1 start2
           end2]
  -- Scheme Procedure: string-suffix-length-ci s1 s2 [start1 end1 start2
           end2]
      Return the length of the longest common prefix/suffix of the two
      strings. `string-prefix-length-ci' and `string-suffix-length-ci'
      are the case-insensitive variants.
 
  -- Scheme Procedure: string-prefix? s1 s2 [start1 end1 start2 end2]
  -- Scheme Procedure: string-prefix-ci? s1 s2 [start1 end1 start2 end2]
  -- Scheme Procedure: string-suffix? s1 s2 [start1 end1 start2 end2]
  -- Scheme Procedure: string-suffix-ci? s1 s2 [start1 end1 start2 end2]
      Is S1 a prefix/suffix of S2. `string-prefix-ci?' and
      `string-suffix-ci?' are the case-insensitive variants.
 

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