:: String -> [String] -package:express package:base

Splits the argument into a list of lines stripped of their terminating \n characters. The \n terminator is optional in a final non-empty line of the argument string. For example:

>>> lines ""           -- empty input contains no lines
[]

>>> lines "\n"         -- single empty line
[""]

>>> lines "one"        -- single unterminated line
["one"]

>>> lines "one\n"      -- single non-empty line
["one"]

>>> lines "one\n\n"    -- second line is empty
["one",""]

>>> lines "one\ntwo"   -- second line is unterminated
["one","two"]

>>> lines "one\ntwo\n" -- two non-empty lines
["one","two"]

When the argument string is empty, or ends in a \n character, it can be recovered by passing the result of lines to the unlines function. Otherwise, unlines appends the missing terminating \n. This makes unlines . lines idempotent:

(unlines . lines) . (unlines . lines) = (unlines . lines)

words breaks a string up into a list of words, which were delimited by white space (as defined by isSpace). This function trims any white spaces at the beginning and at the end.

>>> words "Lorem ipsum\ndolor"
["Lorem","ipsum","dolor"]

>>> words " foo bar "
["foo","bar"]

Given a string of concatenated strings, separate each by removing a layer of quoting and/or escaping of certain characters. These characters are: any whitespace, single quote, double quote, and the backslash character. The backslash character always escapes (i.e., passes through without further consideration) the character which follows. Characters can also be escaped in blocks by quoting (i.e., surrounding the blocks with matching pairs of either single- or double-quotes which are not themselves escaped). Any whitespace which appears outside of either of the quoting and escaping mechanisms, is interpreted as having been added by this special concatenation process to designate where the boundaries are between the original, un-concatenated list of strings. These added whitespace characters are removed from the output.

unescapeArgs "hello\\ \\\"world\\\"\n" == ["hello \"world\""]

Like showLitString (expand escape characters using Haskell escape conventions), but * break the string into multiple lines * wrap the entire thing in double quotes Example: showMultiLineString "hellongoodbyenblah" returns [""hello\n\", "\goodbyen\", "\blah""]