new "$_ZL_FZF_SORT" to sort directories by alphabet in fzf

Author: skywind3000

README.md

@@ -458,6 +458,7 @@ As you see, z.lua is the fastest one and requires less resource.
 
 ## History
 
+- 1.5.6 (2019-02-20): new `$_ZL_FZF_SORT` to sort directories by alphabet in fzf
 - 1.5.5 (2019-02-20): `$_ZL_FZF_FLAG` can be used to override fzf flags, default to "+s -e".
 - 1.5.4 (2019-02-19): fixed: file/path existence detection fails on read-only fs (closed [#49](https://github.com/skywind3000/z.lua/issues/49) by [@contrun](https://github.com/contrun)).
 - 1.5.3 (2019-02-17): new `$_ZL_FZF_FLAG` for passing additional flags to fzf, add `-e` argument to fzf.

z.lua

@@ -4,7 +4,7 @@
 -- z.lua - a cd command that learns, by skywind 2018, 2019
 -- Licensed under MIT license.
 --
--- Version 1.5.5, Last Modified: 2019/02/20 12:07
+-- Version 1.5.6, Last Modified: 2019/02/20 20:20
 --
 -- * 10x faster than fasd and autojump, 3x faster than z.sh
 -- * available for posix shells: bash, zsh, sh, ash, dash, busybox
@@ -1463,6 +1463,9 @@ function z_cd(patterns)
 			tmpname = os.environ('TMP', '') .. '\\zlua_' .. tmpname .. '.txt'
 			cmd = 'type "' .. tmpname .. '" | ' .. cmd
 		end
+		if os.environ('_ZL_FZF_SORT', false) then
+			table.sort(M, function (a, b) return a.name > b.name end)
+		end
 		PRINT_MODE = tmpname
 		z_print(M, true, false)
 		retval = os.call(cmd)