add study note file

diff --git a/.gitignore b/.gitignore
index 55d6ad1..14e7a6c 100644 (file)
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-\#*
\ No newline at end of file
+\#*
+temp/*
\ No newline at end of file

diff --git a/emacs.d/config.org b/emacs.d/config.org
index 1e38901..8e6bbe7 100644 (file)
--- a/emacs.d/config.org
+++ b/emacs.d/config.org
@@ -988,7 +988,7 @@ extend org-mode's easy templates, refer to [[http://coldnew.github.io/coldnew-em
   (add-to-list 'org-structure-template-alist
                '("E" "#+BEGIN_SRC emacs-lisp :tangle yes :results silent\n?\n#+END_SRC"))
   (add-to-list 'org-structure-template-alist
-               '("S" "#+BEGIN_SRC sh\n?\n#+END_SRC"))
+               '("S" "#+BEGIN_SRC sh :results output replace\n?\n#+END_SRC"))
   (add-to-list 'org-structure-template-alist
                '("p" "#+BEGIN_SRC plantuml :file uml.png \n?\n#+END_SRC"))
   (add-to-list 'org-structure-template-alist

diff --git a/study-note.org b/study-note.org
new file mode 100644 (file)
index 0000000..4caf549
--- /dev/null
+++ b/study-note.org
@@ -0,0 +1,86 @@
+#+TITLE: Study Note
+#+AUTHOR: Peng Li
+#+EMAIL: seudut@gmail.com
+#+DATE: 2016-08-18
+
+* Programming Languages
+** gnuplog
+
+1. normal
+#+BEGIN_SRC gnuplot :exports code :file ./temp/sin.png
+  reset
+  plot sin(x)/x
+#+END_SRC
+
+#+RESULTS:
+[[file:./temp/sin.png]]
+
+2. plot with data file
+#+BEGIN_SRC 
+
+#+END_SRC
+
+
+* Perl One Line Command
+#+BEGIN_SRC sh :exports both :results output replace
+  perl --help
+#+END_SRC
+
+#+RESULTS:
+#+begin_example
+
+Usage: perl [switches] [--] [programfile] [arguments]
+  -0[octal]         specify record separator (\0, if no argument)
+  -a                autosplit mode with -n or -p (splits $_ into @F)
+  -C[number/list]   enables the listed Unicode features
+  -c                check syntax only (runs BEGIN and CHECK blocks)
+  -d[:debugger]     run program under debugger
+  -D[number/list]   set debugging flags (argument is a bit mask or alphabets)
+  -e program        one line of program (several -e's allowed, omit programfile)
+  -E program        like -e, but enables all optional features
+  -f                don't do $sitelib/sitecustomize.pl at startup
+  -F/pattern/       split() pattern for -a switch (//'s are optional)
+  -i[extension]     edit <> files in place (makes backup if extension supplied)
+  -Idirectory       specify @INC/#include directory (several -I's allowed)
+  -l[octal]         enable line ending processing, specifies line terminator
+  -[mM][-]module    execute "use/no module..." before executing program
+  -n                assume "while (<>) { ... }" loop around program
+  -p                assume loop like -n but print line also, like sed
+  -s                enable rudimentary parsing for switches after programfile
+  -S                look for programfile using PATH environment variable
+  -t                enable tainting warnings
+  -T                enable tainting checks
+  -u                dump core after parsing program
+  -U                allow unsafe operations
+  -v                print version, patchlevel and license
+  -V[:variable]     print configuration summary (or a single Config.pm variable)
+  -w                enable many useful warnings
+  -W                enable all warnings
+  -x[directory]     ignore text before #!perl line (optionally cd to directory)
+  -X                disable all warnings
+  
+Run 'perldoc perl' for more help with Perl.
+
+#+end_example
+
+1. Used as =grep=
+#+BEGIN_SRC sh
+  perl -ne 'print if /expression/' xxx.log;
+#+END_SRC
+
+Or 
+#+BEGIN_SRC sh
+  perl -wnl -e '/keyword/ and print;' xxx.log
+#+END_SRC
+
+
+2. Used as =awk=
+#+BEGIN_SRC sh
+  perl -ne 'print "$1\n" if /aaa=(\d+)\s.*/' xxx.log;
+#+END_SRC
+
+3.
+#+BEGIN_SRC sh
+  perl -pe 'some code' < input.txt > output.txt
+#+END_SRC
+