Arrays

Array assignement

a=["Hello", "this", "is", "an", "array"]

a=%w(Hello this is an array) #Better

Array join

a=[1, 2, 3]
puts a.join("+")

a=[1, 2, 3]
puts a*?+ #Better

Try to set your array as $*

a=[]
6.times do |i|
 a << i
end

6.times do |i|
 $* << i
end

Array shift

a=[1,2,3]
a.shift

a=[1,2,3]
a[1..-1]  # Better

Change compact

a=[1, nil, 2, nil, nil, 3]
a.compact

a-[nil] #Better

Uniq

a.uniq

a|[]

# Arrays