Maiar's Vault

How do you interpolate strings in Elixir? You use #{} in strings to add in elixir  iex> IO.puts "Hello #{:world}" 

What are booleans in Elixir? Booleans are actually Elixir atoms

What are boolean values in Elixir? The two boolean values are: iex> true true iex> false false

How many ways can I write numbers in Elixir? You can write them in: Decimal Binary Octal Hexadecimal iex> 1.0 1.0 iex> 10 10 iex> 0b1010 10 iex> 0o777 511 iex> 0x1F 31

Where can I ask questions about Elixir? You can ask on: IRC: #elixir-lang at freenode IRC Slack: https://elixir-slackin.herokuapp.com/ Elixir Forum: https://elixirforum.com/ Stackoverflow: https://stackoverflow.com/questions/tagged/elixir

How do I run a elixir script? Type in a file: IO.puts "Hello World!" Then execute: $ elixir simple.exs

How do I print output in Elixir? IO.puts "Hello World!"

Elixir data types: iex> 1 # integer iex> 1.0 # float iex> true # boolean iex> :atom # atom / symbol iex> "elixir" # string iex> [1, 2, 3] # list iex> {1, 2, 3} # tuple iex> sum = fn ( a , b ) -> a + b end # tuple iex> kw_list = [{:one, 1}, {:two, 2}] # keyword list iex> map = %{:a => 1, 2 => :b} # map

How do you get UTF-8 in Elixir? All the strings in Elixir are already UTF-8

How do I find the version of elixir is installed? Type: $ elixir -v

How do I install Elixir on a Mac? The easiest was is to use brew $ brew install elixir  Reference:  https://elixir-lang.org/install.html#mac-os-x

type: $ iex

If you haven't used rsync yet you should. It's a great tool for mirroring http://www.samba.org/rsync/

In vi to page up and down type Ctrl-b aka (^b) Ctrl-f aka (^f)

Global Search and Replace : The magic command is :line1,line2s/old_string/new_string/g The /g is optional, it means 'do the replace everytime'.If not specified, vi will replace only the first occurrence in each line. Special ^XX characters To search for a ^XX character, you must use Ctrl - v ( ^v ) in order to disable interpretation of the Ctrl commands. A useful example: Windows (MS-DOS) text files use RETURN/LINEFEED to end every line; Mac uses only RETURN; and Unix/Linux uses only NEWLINE (which is the same as the linefeed in DOS). To use the linux programming style: \r\n = chr(13)chr(10) = MS-DOS \r = chr(13) = Mac \n = chr(10) = Linux/Unix So when displaying an msdos ascii file with vi (or with any other text editor), you will find each and every line ended by a ^M (it's character 13, aka \r, aka ENTER). When displaying a mac as

The end of file character is different on different operating systems so the end of line aka eof is: Control-D on Unix Control-Z on Windows

Timestamps can be confusing and difficult to work with in oracle. It took me a little time to figure out but the following SQL will give you SELECT (CAST(SYS_EXTRACT_UTC(systimestamp) AS DATE) - TO_DATE('19700101', 'YYYYMMDD')) * 86400 seconds , current_timestamp FROM dual the UTC time in seconds from the epoch, as a floating point number. 60 * 60 * 24 for 60 seconds * 60 minutes * 24 hours = 86400

Here is some code for looping through days http://datetime.perl.org/index.cgi?FAQSampleCalculations http://datetime.perl.org/index.cgi?FAQBasicUsage #!/bin/env perl use DateTime; my $start_dt = DateTime->new(year => 2009, month => 4, day => 27); my $end_dt = DateTime->new(year => 2009, month => 5, day => 18); my $weeks = 0; for (my $dt = $start_dt->clone(); $dt <= $end_dt; $dt->add(days => 1) ) { print $dt->date('')."\n"; $weeks++; }

In vi to page up and down type Ctrl-b (^b) Ctrl-f (^f)

Just use my web page that I setup to escape single quotes in bash http://www.stevemorin.com/utils/bashEscape.html

$ sbcl --eval '(progn (print *posix-argv*)(quit))' two three