RS notes

src/awk.gmo

@@ -4,6 +4,11 @@ an awk-ward (or not really) language.
 
 some notes in process.
 
+# resources
+
+=> https://www.gnu.org/software/gawk/manual/html_node/index.html gawk user's guide
+=> https://www.tutorialspoint.com/awk/index.htm awk tutorial: tutorialspoint
+
 # some built-in variables
 
 * FS: input field separator (by default, space)
@@ -21,7 +26,6 @@ $0 represents the entire input record, and $n the nth field in the current recor
 
 # some built-in functions
 
-
 => https://www.tutorialspoint.com/awk/awk_built_in_functions.htm awk tutorial: built-in functions
 => https://www.tutorialspoint.com/awk/awk_miscellaneous_functions.htm miscellaneous functions
 => https://www.tutorialspoint.com/awk/awk_string_functions.htm string functions
@@ -49,10 +53,10 @@ the index of the first character is 1!
 * system: execute the specified command and returns its exit status
 * delete: delete an element from an array, or an array
 
-## gawk only
+# gawk
 
-=> https://www.gnu.org/software/gawk/manual/html_node/Bitwise-Functions.html bit-manipulation functions
 => https://www.gnu.org/software/gawk/manual/html_node/index.html gawk user's guide
+=> https://www.gnu.org/software/gawk/manual/html_node/Bitwise-Functions.html bit-manipulation functions
 
 note: to run in compatibility mode, without gnu extensions, use the -c or --traditional flag:
 
@@ -62,6 +66,21 @@ $ awk -c
 
 # other notes
 
+* apparently counters/accumulators don't need to be initialized at 0
+* boolean values are 0 or 1
+
+## record separation
+
+records separated by empty lines can be extracted with:
+
+```
+RS = ""
+```
+
+without modifying FS, fields will be separated by any whitespace, including newlines.
+
+gawk allows regexp in RS, traditional awk will only accept one character.
+
 ## loop through the elements of an array
 
 ```