
EURJPY Trade

A Computer Person Journey
A lambda is a way to define a block and its parameter with special syntax.
greet1 = -> { puts “Hello world.” }
greet2 = lambda { puts “Hello world !” }
greet1.call
greet2.call
greet_with_param = ->(name) { puts “Hello #{name}!” }
greet_with_param.call(“Joni”)
What happen to NZD pair.
Ubuntu/Debian : sudo apt install tlp
to start it : sudo tlp start
to show stat : sudo tlp stat
Long time no see wordpress ! been busy lately.
The spaceship operator is general comparison operator. The <=> operator compares 2 values and returning -1, 0, or 1 depending on whether the first value is less than, equal, or greater than the second.
Example in irb.
This operator is used on ruby range operation , objects must implement <=> and succ method to perform range operation. Lets test the a numeric value for these methods.
Keep learning ruby on 2021.
One book that help ruby spread outside Japan. The book use Ruby 1.6 but still relevant.