1caf6ec14e3a0a6f010ec4b5fe5f90d366a64021
kent
  Thu Aug 8 11:30:36 2019 -0700
Updating a doc to describe operators as well as functions, and also rename some of the builtins.

diff --git src/lib/strex.doc src/lib/strex.doc
index cb69300..21c61fe 100644
--- src/lib/strex.doc
+++ src/lib/strex.doc
@@ -1,19 +1,23 @@
 The strex language is a small string expression evaluation language.  
-This document describes its built in functions:
+This document describes its built in functions and operators:
+
++  - returns the concatenation of the surrounding strings.  Will convert a number to a string
+
+[] - selects an element from a comma-separated value list.
 
 between(prefix, string, suffix) - returns the part of string found between prefix and suffix
    example:   between("abc", "01234abcHelloxyz56789", "xyz")  fetches just "Hello"
    If there are multiple places the prefix occurs, it will choose the first one, and the
    then the first place the suffix matches after that.  The biologist might think of it as
    a text oriented PCR, though the primer prefix and suffixes are not included in the output.
 
-split(string, splitter, index) - separates string with splitter character. Returns 0 based index.
+split(string, index)  - treats string as space separated, and returns word of given 0 based index
 
-spaced(string, index)  - treats string as space separated, and returns word of given 0 based index
+separate(string, splitter, index) - separates string with splitter character. Returns 0 based index.
 
 trim(string) - returns copy of string with leading and trailing spaces removed
 
 md5(string) - returns an MD5 sum digest/hash of string. Useful for creating IDs
 
 now() - returns current time and date in a really aweful unix ctime(2) format.  We will improve it.